Past IABSE Webinars

Seismic Isolation: Concepts, Research and Applications

Duo-IABSE webinar: A Bridge between Academia and Profession

Register for this webinar (free): Click Here

Date and Time: May 13, 2022, 14:00 - 15:30 CET.

This Webinar is an IABSE Commission 1 initiative

Mederators: Salvatore C. Di Bernardo (US) and Maria Pina Limongelli (Italy). 

Speakers: Michael C. Constantinou (US) and Zhu Zhongyi (China).


Sponsor: Seismic PS.

Webinar Description: 


The Beijing Daxing International Airport features one of the largest airport and multimodal terminal. In addition to an unique architectural design the Terminal features one of the largest seismic base isolation system. This webinar will look at this case study to evaluate the effective application of a base isolation to a large heavily used building and will walk the audience through what are the key factors in determining the effectiveness of this or other similar concepts through a thorough illustration of research and applications. The Beijing Daxing International Airport Terminal, named by the Guardian as one of seven mega-structures wonders, was the winner of the 2021 IABSE Outstanding Structure Award.


Duo-IABSE webinars:


A bridge between academia and profession: The Duo-IABSE webinars is an initiative of TG1.9 of IABSE Commission 1, aimed to provide a forum for the presentation and discussion of hot topics related to bridge and structural engineering. An academic and a practitioner, experts on the theme, will be invited to present and discuss it from the perspective of the academia and of the profession. Questions from the public will provide the chance to further widen the forum.



What are the research fundamentals and the design features of a base isolation system?
With a footprint of approximately 1 square kilometer the Beijing Daxing International Airport Terminal is the world’s largest airport terminal, which also integrates a high-speed rail transit terminal. The Terminal is in a seismic area and its central area features the largest seismic-isolation system in the world. The seismic isolation system is designed to mitigate the damaging effects of earthquakes on structures through the introduction of flexibility and energy absorption capability within the structural system.  The seismic isolation system used in the Beijing Terminal reduces the impact of seismic events and, under certain conditions, reduces accelerations and protects non-structural systems. Base isolation is also used to reduce the structural thermal effects thus enabling the realization of a single concrete floor slab with an area of 180,000 square meters without expansion joints.

This webinar will introduce the audience to the concepts, contemporary research issues, and application of seismic isolation in an approach that centers on implementation out of the experience and practice of the presenters. Beyond the presentation of the Beijing Daxing Terminal structural concept, other selected applications of these technologies will be briefly discussed, together with the research that led to these implementations. .

Michael C. Constantinou is Samuel P. Capen Professor and SUNY Distinguished Professor at the University at Buffalo, New York, and is editor of the Journal of Earthquake Engineering and Structural Dynamics. He is the 2015 ASCE Nathan M. Newmark Medal recipient. His research concentrates on seismic protective systems, where he published over 300 papers, and has been involved as consultant or peer reviewer in over 100 structures worldwide.


Zhu Zhongyi is the Chief Structural Engineer of the Beijing Institute of Architectural Design. He is responsible, among many projects, for the design of the active reflector’s primary supporting structure of the Five-hundred-meter Aperture Spherical Radio Telescope (FAST) in the PRC, the FIFA World Cup Qatar 2022TM main venue Lusail Stadium in Qatar, and the terminal building of the Beijing Daxing International Airport.


WEBINAR: Full Scale Testing of a Stadium for 'Jumping Crowd Load'

January 27, 2022. 14.30 - 15.30 hrs CET. Organized by the Danish Group of IABSE.

Recorded video:


Torben Bilgrav Bangsgaard , Chief Consultant, Monitoring & Analyzes of Existing Structures, Rambøll Denmark
Expert in structural monitoring, dynamic loading and response of existing structures, digitalization and design and implementation of structural health monitoring systems. 
Claus Pedersen, Ph.d., Senior Chief Consultant, Monitoring & Analyzes of Existing Structures, Rambøll Denmark
Expert in load capacity assessment, rehabilitation and strengthening of existing bridges and other structures, including advanced modeling and analysis of both steel and concrete structures by means of numerical methods and probabilistic approaches.


Jan Vig Nielsen, Head of Department, Monitoring & Analyzes of Existing Structures, Rambøll Denmark



The tell-it-almost-all story of how the Standing terraces at Brøndby Stadium have been rehabilitated over the last three years to again allow for the full capacity of 4700 people to jump to fan songs during football matches – finally achieving the goal in October 2021. Vibration measurements in November 2018 up to 1.9G found that the terrace structures had insufficient capacity to sustain the dynamic loading from the spectators jumping to the beat of the fan drums, causing Brøndby IF (club and owner) to introduce restrictions on the use of the standing terraces and reduce the number of spectators allowed to 2750. The insufficient capacity (up to 135% utilization) was a consequence of the Danish design codes not including dynamic pedestrian loading up till 1999, and further an observed growth in correlated jumping over the last 15 years. 

Since Brøndby IF and Ramboll has in close collaboration investigated the best means to rehabilitate the terraces to again allow the full capacity. The resulting strengthening project has made innovative use of monitoring solutions (smart phones & GoPro cameras) to acquire vibration data from the terraces during matches, which has constituted the basis for establishing the design loads used for the strengthening structures in combination with current design codes. This has allowed for an optimized steel structure focused on joining the existing terrace elements to reduce the effective dynamic loading from the jumping supporters. To validate the solution prior to commencement large scale dynamic load testing was conducted in June 2021 with approx. 350 jumping supporters – a modern equivalent to the load testing carried out on Wembley in 1923.  


The recommencement of the “Sydsiden” standing terraces at full capacity took place in October 2021, only a week after the partial collapse of a standing terrace at the De Goffert Stadium in Nijmegen, Netherlands. This further highlights the importance of the Stadium owners executing proper operation and maintenance of their stadium structures with the professional engineering support on the load and safety requirements to existing structures subject to dynamic loading. The presentation will subsequently also be given at a physical DSBY-meeting in Ramboll’s head office in Copenhagen on the same date, Thursday January 27 17:00-19:00. 



Nov.-Dec.2021 Online Course (in German) provided by the Austrian Group of IABSE (registration required, with fees):


Under the guidance of Prof. Rainer Flesch, an online course on "Structurals Dynamics and Earthquake Engineering for Practical Use" will be offered by Austrian Standards in November and December 2021 (in German only). Other lecturers are: Prof. Peter Bauer, Werkraum Ingenieure ZT GmbH; Robert Veit -Egerer and Lukas Moschen, FCP/VCE ZT GmbH; Benedikt Tappauf, tappauf.consultans Gmbh; Branko Rusnov, engineering consultant for civil engineering; Michael Reiterer, REVOTEC ZT GmbH; Karoline Alten, Marian Ralbovsky and Alois Vorwagner, AIT Austrian Institute of Technology GmbH.

Content of the course:

The analysis and assessment of buildings and infrastructure structures subjected to structural dynamic loads is gaining importance with the increasing demands on structures as well as natural disasters. Additional loads due to wind or architectural trends towards slender or tall structures influence the building behavior and can lead to building defects and building damage if designed incorrectly. Earthquakes with significant destructive potential are fortunately rare in Austria. In most cases, the damage is minor, but there are regions with zone classification 4. In such areas, buildings may be destroyed or severely damaged.



16 November 2021: Webinar (in German), organised by the Austrian Group of IABSE


Topic: Linienkreuz U2xU5 – „Ein Mehrwert für Wien“

U2xU5 line interchange - "An added value for Vienna".

Time: 13-14 hrs (CET).

Recorded video:


Speaker: Dipl.-Ing. Martin Hrunek, Wiener Linien, Abteilungsleiter B67 – Ingenieurbau und Großprojekte/Management, Head of Department B67 - Civil Engineering and High-Volume Projects/Management.

Moderators: Alfred Strauss, Alois Vorwagner, Roman Geier and Efi Apostolidi


Mit der U-Bahnbaustelle U2xU5 startet das wichtigste Öffi-Projekt in Wien seit dem Spatenstich für die U1 vor fünfzig Jahren. Gleich zwei U-Bahn-Projekte werden dabei auf einmal realisiert. Die Bauarbeiten im Herzen Wiens sowie der Umbau von Bestandsbauwerken stellen dabei eine spannende Herausforderung bei der Umsetzung des Projektes dar, in die Herr Dipl.-Ing. Hrunek in diesem Webinar einen Einblick gewährt. Der Vortrag findet in Deutsch statt.


The U2xU5 underground construction site marks the start of the most important public transport project in Vienna since the groundbreaking ceremony for the U1 fifty years ago. Two underground projects are being realized at once. The construction work in the heart of Vienna and the conversion of existing buildings represent an exciting challenge in the implementation of the project, which Dipl.-Ing. Hrunek will provide an insight into in this webinar. The webinar will be held in German.


Duo-IABSE webinar: Bridge Collapses - Lessons Learnt

(A Bridge between Academia and Profession)


Date: 12 November (Friday), 2021, 15-16.30 hrs (CET).


Recorded video:



Camillo Nuti, full professor at Roma Tre University in Italy,  was a member of the technical commission appointed by the government after the collapse of the Polcevera Bridge, He followed in detail the investigations in the first month after the event. 


Jonathan McGormley, principal at Wiss, Janney, Elstner Associates in UShas been involved in multiple bridge failure investigations with an emphasis on fatigue and fracture issues.



Maria Pina Limongelli, Politecnico di Milano, Dept. of Architecture, Built Environment and Construc. Eng., PhD, Assoc. Prof.


Salvatore Di Bernardo,  is the president of Ciorba Group a US based transportation company with a specialty in bridge inspection, asset management and design .


Failures of structures are often tragic events, but they also represent opportunities to improve our understanding. The collapse of the Polcevera Bridge, Riccardo Morandi’s masterpiece, inaugurated in 1967, was a shock for Italian Engineering and an immeasurable tragedy that involved human losses as well as the substantial direct and indirect cost associated.


What can we learn from these tragedies?


The failure of a bridge often focuses the nation’s attention on the state of our existing bridges and triggers discussions on infrastructure: design, inspection and management, environmental impact. Investigations of bridge failures occurred in US in the last 40 years have shown that, interestingly, fatigue and brittle fracture have not led to the collapse of bridges that are often due to other causes. In Italy a strong impulse, at governmental as well as professional level, came from consciousness of the importance of knowledge of detection of deterioration of infrastructures and introduction of tools to deal with such items.

In this webinar the recent history of some catastrophic failures of bridges will be reviewed, to see what lessons can be learned and to assess the role that maintenance and inspection procedures may have played in these events.


Duo-IABSE webinars: a bridge between academia and profession


The Duo-IABSE webinars is an initiative of TG1.9 of IABSE Commission 1, aimed to provide a forum  for the presentation and discussion of hot topics related to bridge and structural engineering. An academic and a practitioner, experts on the theme, will be invited to present and discuss it from the perspective of the academia and of the profession. Questions from the public will provide the chance to further widen the forum.


IABSE Webinar: Second Generation Eurocodes

Date: 1 October (Friday), 2021, 14-15.30 hrs (CET).


Recorded video:


The Eurocodes are European standards specifying how structural design should be conducted within the European Union (EU). Their development started 1990 by the European Committee for Standardization (CEN) upon the request of the European   Commission. Eurocodes were taken officially in use 2006–2010 in each EU country. The second generation of the Eurocodes are currently under development by CEN/TC250 and planned to be in use 2026–2028. It is evident that Eurocodes have influenced huge number of engineers in EU countries, but as being a detailed and modern design standard, also influenced indirectly projects and developments elsewhere.  The webinar is targeted to give insight how the second generation of the Eurocodes are developed, managed and reviewed.




Prof. Steve Denton, UK, being elected to his third term 2018 Professor Steve Denton is long-standing Chairman of CEN/TC250. He is Visiting Professor of University of Bath and works as Head of Civil, Bridge and Ground Engineering in WSP in the UK. His experience covers engineering, strategic consultancy, research and construction. He has been advisor to multiple clients and government in the UK. Among his other engagements, Steve has been involved in developing national and international design standards on the past two decades.


Dr. Mariapia Angelino, UK is technical reviewer of all parts of the 2nd generation Eurocodes. She works as Associate in the WSP Bridges department in the UK. Mariapia got her Engineering Doctorate (EngD) Degree from University of Bristol on the research related to developing better design standards for the construction industry. In addition to her involvement in CEN/TC250 activities, she provides technical consultancy and research services in the field of development, implementation and application of standards and standardisation systems at national and international level. She led the consultancy work for Highways England to redevelop about 400 standards for the UK strategic road network, contributing to vision, strategy and implementation plans.


Dr. Risto Kiviluoma is Chair of the Finnish Group of IABSE. Starting from the ICT Conference 2008 Helsinki he has long experience on arranging and moderating international IABSE events in Finland. The conference was followed by the Workshops 2013, 2015 and 2017 related to the safety, failures and robustness of structures. Over the 28 years of professional carrier Risto has done his main research and consultancy activities in the field of wind engineering of bridges. He has also teach general bridge engineering in three occasions including the Professor of Practice term at Aalto University 2013–2018. Risto works as Technology Director, Bridges, WSP in Finland.

IABSE Webinar: Resilience-Based Management of Bridge Portfolios in Seismic Regions

Date: 9 July (Friday), 2021, 14-15 hrs (CET).


Recorded video:


Speaker: Prof. Anastasios Sextos, PhD, MASCE, FHEA, Professor of Earthquake Engineering, Head of Earthquake and Geotechnical Engineering Research Group, University of Bristol, UK.


Roadway infrastructure (primarily bridges, overpasses and junctions) form an interconnected and complex system of assets that is designed to facilitate the continuous provision of services essential to the functioning of society, especially in highly urbanized regions. Resilience of this system, namely its ability to withstand, adapt to, and rapidly recover after a disruptive event, is therefore vital for the safety, security and prosperity of our communities. This presentation focuses on two of the most important challenges towards holistic disaster risk mitigation and management: (a) quantification of roadway infrastructure resilience in a way that is meaningful and applicable for informed decision-making and (b) rigorous, yet computationally efficient, assessment of superstructure and its supporting subsoil as a holistic, dynamic and interacting system. The outcomes of several research projects will be critically reviewed focusing on the reliable consideration of epistemic and aleatoric uncertainties propagating from the hazard to the structural component level, the structure and the network level. RETIS-Risk is such a multi-disciplinary project that considers the above aspects of highway network resilience to seismic loading and establishes a comprehensive, multi-criterion framework for mitigating the overall loss experienced by the community after an earthquake event. Vulnerability of bridges and overpasses is assessed in detail considering dynamic soil-structure interaction (SSI) effects. Loss is decoupled into direct (i.e., arising from structural/geotechnical damage) and indirect, associated with the travel delays of the network users, as well as the wider socio-economic consequences in the affected area. Given the computational demand for large scale finite element modelling associated with dynamic SSI problems, recent advances in reduced order modelling will be presented next. This work relates to multi-objective optimization of Lumped Parameter Models (LMP) and permits consideration of frequency- and intensity-dependent SSI in the time domain. The talk will further present an application of the above computational scheme for the case of a large highway network in Greece and conclude with a spectrum of ideas for future research in the field of structural, earthquake and resilience engineering.


IABSE Webinar: Risk Management of Large Scale Projects

Date: 24 June, 2021, 13-14 hrs (CET).


Recorded video:


Extreme events are usually far away in our minds. If they occur, nevertheless, they often hit us unexpectedly. When single events with severe consequences for the environment and people occur, most people perceive them as extreme.

On the other hand, anyone hardly cares about a large number of smaller events over a longer period of time, whose combined impact is of similar magnitude.

Particularly in large construction projects, the occurrence of unexpected, extreme events, such as natural hazards, could result to e.g. the collapse of a bridge or a fire in a tunnel quite often and this causes a shock effect, also perceived by the public. Moreover, the overrun of costs and construction time, caused by unknown risks, could lead to fear and blame. In this presentation, Konrad Bergmeister shows a possible way on how such unknown risks, but also unknown opportunities can be countered. Based on scientific principles and extensive practical experience, he addresses a structured holistic opportunity-risk management for large projects. In his Life-Talk, the issue of the Corona Pandemic is also addressed from the perspective of risk-reward management.


Speaker: Konrad Bergmeister, Univ.-Prof. Dipl.-Ing. M. Sc. Ph. D. Dr. phil. Dr. techn. DDr.-Ing. e.h. Konrad Bergmeister is head of the Institute of Structural Engineering at the University of Natural Resources and Applied Life Sciences, in Vienna, Austria. He is editor of the Beton-Kalender and the journal Beton- und Stahlbetonbau. Until 2019, he was responsible for the planning and construction of the Brenner Base Tunnel, and before that he was chief engineer of the Brenner Motorway. Now, he is working again as a civil engineer, with the Bergmeister engineering office being active with competence in all classical engineering disciplines and in four different locations Brixen (IT), Munich (DE), Vienna (AT) and Zurich (CH).


IABSE Webinar: Concrete Plasticity – A Historical Perspective

Date: 10 June (Thursday), 2021, 14-15 hrs (CET).


Recorded video:


This webinar is being organised by the Danish Group of IABSE. The presentation shall review the development of limit analysis, from Galileo through Coulomb to the Mathematical Theory of Plasticity formulated by Hill and Hodge, Prager & Drucker and independently by Gvozdev. The application to structural concrete slabs was pioneered by Johansen and Gvozdev, and extended to walls (membranes), beam shear and punching shear by Nielsen and the Copenhagen Shear Group. Simultaneous and subsequent advances were – and are - made by research groups in a.o. Zurich, Cambridge, Toronto, Houston and Lausanne. The concept of yield lines, essential for the development of solutions, is introduced, and the distinction from the conventional notion of cracks shall be discussed. An overview of applications will be given, focusing on slab flexure, in-plane and beam shear, and punching shear.


Speaker: Mikael W. Braestrup obtained his Ph.D. in structural engineering from the Technical University of Denmark in 1970, and subsequently spent two years as a volunteer in charge of low-cost road construction in the Peruvian Andes. Prior to joining the consulting company Ramboll in 1979 Dr Braestrup was engaged in research and teaching in Copenhagen, Denmark, and Cambridge, U.K., principally working on the application of classical plasticity theory to structural concrete members subjected to shear. During the period 1992 - 2005, he worked in the Ramboll Department of Bridges, a major assignment being the preparation of the design basis, with the application of Eurocodes, to the 16 km Øresund Link road and rail strait crossing between Denmark and Sweden. Since 2005 he is attached to the Ramboll Energy division, department of Pipelines, on a part-time basis since 2015. Dr Braestrup has been an active member of IABSE since 1979, when he co-organised the Copenhagen Colloquium on ‘Plasticity in Reinforced Concrete’ and received the IABSE Prize in 1984, and went on to serve in several organising and editorial boards.


Moderator: Tina Vejrum, is the Chair of IABSE’s Danish National Group, Vice President of IABSE, and Vice President of the Major Bridges International Dept. At COWI, in Denmark. Her special competences include extensive line management and project management. She has been extensively engaged with IABSE in various committees and is also member of the SEI Editorial Board.


IABSE Webinar: The Chirajara Bridge Collapse

Date: 27 May (Thursday), 2021, 14-15 hrs (CET).


Recorded video:


On January 15, 2018 at 11:49, the west pylon B of the Chirajara Bridge, with its cantilevered cable-stayed superstructure, collapsed during construction of final parts of the bridge girder – just before closure at midspan. The crossing is located approximately 20km NW of Villavicencio, Colombia. The collapse led to the immediate and total destruction within seconds of the Pylon, together with the erected span of the bridge girder. Authorities reported nine fatalities resulting from the collapse. Shortly thereafter, the project insurer QBE Segures, Colombia commissioned an independent investigation into the collapse of the bridge, through loss adjusters ONC Adjusters, Bogotá, Colombia. An international team of bridge engineering experts was assembled to undertake the investigation. The investigation was completed in August, 2018. The causes of the failure and the sequence of successive and progressive failures of the individual structural components and thus the entire mechanism of the bridge collapse was identified and analyzed. Key findings and recommendations from the investigation, as well as lessons that may be extracted from this unfortunate event, will be presented.



Christos T. Georgakis is Professor of Structural Dynamics and Monitoring at Aarhus University, a position he formerly held at the Technical University of Denmark. Having worked briefly at the engineering consultancies Flint & Neill Partnership in London and later at Force Technology in Copenhagen, he went on to establish the specialist engineering consultancy Georgakis & Associates. His consultancy engagements have included Hong Kong’s Stonecutters Bridge, Scotland’s Queensferry Crossing, the Gordie Howe International Bridge and the Port Mann Bridge in Canada. His research focuses on structural dynamics, aerodynamics and vibration control, with several patented technologies in the fields of wind turbine vibration control and bridge cables ascribed to him. He is co-author of the well-known book Cable Supported Bridges, Concept and Design and he is an IABSE Fellow. On behalf of the bridge insurers, Professor Georgakis was tasked with assembling an international team of experts and leading the overall investigation of the cable-stayed Chirajara Bridge collapse in 2018.


Klaus H. Ostenfeld is honorary Professor in Bridge and Structural engineering at Aarhus University, and former President CEO for COWI, Consulting Engineers. He graduated 1966 with a M.Sc. degree from Danish Technical University. He majored in design of major bridges and has spent most of his 55-year carrier in the field of major bridge design and construction internationally. After a few years in a Danish consulting firm Klaus was employed by an American consultant in St Louis, MO. and Phoenix AZ. where he obtained his registration as Professional Engineer and after 3 years, he became employed in Paris in the French firm Europe Etudes for 4 years where he became project responsible for the design and construction of the advanced posttensioned shell structures for the Olympic Games in Montreal, Canada 1976. Since 1977 Klaus was engaged in the design of the huge Great Belt Project comprising the world record suspension span of 1.624 m and other world record bridges like the Normandy bridge steel superstructure in France and the Oresund Link before he became Group CEO for the COWI Group which he developed from 2000 to 5000 employees before his retirement. Klaus Is now honorary professor at Aarhus University and recognized international expert consultant with assignments in several countries. Klaus served as president for IABSE 1997-2001 and Chair of the IABSEFoundation 2004-2011 and is Honorary member and Fellow of IABSE as well as many other professional organizations including ASCE and VDI. Klaus has received numerous international awards and prizes. As professor Klaus has taken particular interest in educating in structural understanding and behavior including the analysis of the catastrophic failure of the Chirajara Bridge.


Webinar: Ultra-High-Performance-Concrete (UHPC)

Date: 30 April (Friday), 2021, 14-15 hrs (CET, GMT +1).

Speaker: Prof. Lukas Vrablik, Czech Republic; Moderator: Prof. Roman Lenner, South Africa.

Organised by the South African Group of IABSE.


Recorded video:


The topic of webinar will be practical use of Ultra-High-Performance-Concrete (UHPC) as the main material for superstructure of pedestrian bridges. Two practical examples of real pedestrian bridges will be presented – first is a segmental single span bridge (completely made by UHPC segments) and the second example is a cable stayed pedestrian bridge where the superstructure is composed of UHPC segments. Information about design (material and structural analysis, detailing and construction stages) will be described and presented.   


Moderator: Roman Lenner – Associate Professor at Stellenbosch University and IABSE National Chair of South Africa, Member of IABSE TG1.3 Work Group and Joint Committee for Structural Safety. Main research interests are structural reliability, bridge design and bridge traffic loading. Practical experience involves bridge design in USA and design review of tunnels in Germany along with working as a World Bank consultant for transportation projects in southern Africa.


Speaker: Lukas Vrablik – Associated professor CTU in Prague, Head of Department of Concrete and Masonry Structures; Technical director Valbek; Member of group for Eurocode and Model Code implementation; specialized for bridge design (long span bridges, arch bridges, pedestrian bridges), mathematical simulations of structure and material behaviour; monitoring of existing structures. Author or co-author of more than 100 publications and contributions to proceedings, 2 patents, 1 momograph.

Webinar: ​Parametric Structural Design with Isogeometric Analysis

Date: 9 April (Friday), 2021, 14-15 hrs (CET, GMT +1).

Speaker: Dr. Anna Bauer, Germany; Moderator: Prof. Jan Wium.

Organised by the South African group of IABSE.


Recorded video:


Isogeometric analysis (IGA) is a fairly new approach within finite element analysis. In contrast to classical approaches that require a replacement of the CAD model by a finite element model, IGA omits this step by using the same parametric description also for the analysis. The Ansatz functions used are usually Non-uniform Rational B-Splines (NURBS). The smooth basis functions and the seamless link to CAD provides a lot of possibilities in the design of structures. This talk will give a brief overview of IGA and the respective requirements and challenges. Furthermore, the potentials of the method within the parametric design of light-weight structures, such as bending-active structures with mounting processes and form finding of tensile membrane structures, are highlighted.


Speaker: Dr. Anna Bauer is a structural engineer at Mayr Ludescher Partner and recently finished her Ph.D. at the Chair of Structural Analysis of Prof. Dr.-Ing. K.-U. Bletzinger at the Technical University of Munich. She is exploring and developing the novel simulation approach of isogeometric analysis with CAD-integration for the design of lightweight structures. The applications are manifold but one main focus is the construction process of bending-active structures. She received her B.Sc. (2012) and M.Sc. (2015) in Civil Engineering at the Technical University of Munich. In 2018, she was awarded the IASS Hangai Prize for her paper on sliding cables with isogeometric analysis at the annual symposium.


Moderator: Prof. Jan Wium, responsible for the discipline in Construction Engineering and Management, at Stellenbosch Univeristy, South Africa. His research areas encompass construction risk, design management, modular construction and the use of technology in construction. He has served as an Editorial Board Member for IABSE's journal SEI, and as a governing body member in several committees within IABSE. He completed his PhD from EPFL, Lausanne, Switzerland.


Risk-based asset management and the potential of UHFB in railway bridge construction from the point of view of the infrastructure operator


Web meeting March 4th, 2021. 16: 00-17: 00. Speaker: Dipl.-Ing. Herbert Friedl, SBB AG - infrastructure, Head of Asset Management in Civil Engineering.


Language: German. Organised by Austrian Group of IABSE. 


Recorded video:


The Swiss Federal Railways -SBB- manage a remarkable infrastructure system with over 6,000 bridges, more than 17,000 retaining walls and over 400 tunnels. These structures alone represent a replacement value of around 30 billion Swiss francs. So far, decisions regarding building maintenance and future cost planning have mainly been used for the condition classes (grades) of the individual buildings.


As part of the further development of the asset management of civil engineering structures, a change from the condition-based approach to a risk-based approach is planned. Many additional parameters are taken into account. Evaluations of the probability of failure of structures, estimates of the volume of traffic on the lines and on the bridges, etc.


A risk-based model for railway bridges has been developed and can be used to identify top risks and differentiate at the network level. In 2017, the SBB realized a railway bridge which was built from reinforced UHFB.


The advantages of structures made of UHFB are lower life cycle costs and, thanks to the modular design with a high degree of prefabrication, enable shorter construction times and thus fewer operational restrictions. The bridge with a span of 6.0 m was equipped with a monitoring system in order to record the behavior of the structure as a result of train crossings. After three years of monitoring, the results confirm the correct behavior of the bridge and future structural maintenance will be carried out according to existing standards. This webinar will introduce the new risk-based approach to asset management and presents UHFB applications at SBB.


Webinar: Structural Analysis & Design Using Advanced Software: A Six-Story Building Application

February 22, 2021 Organised by the Philippine group of IABSE.


IABSE Webinar: "Incremental Launching - Multispan Steel Bridges”


Moderator: Rafael Martinez (Spain), Speaker: Javier Martinez (Spain).

Date: 4 February, 2021, 14-15 hrs (CET).

Recorded video:


Description: This webinar is an initiative by IABSE Task Group 4.14 (Commission 4) on Special Heavy Lifting Equipment, Chaired by Javier Martinez. This online presentation and Q&A session will review the different technologies and specific tools developed during the last few years for incremental launching multispan bridges showing different types of soiutions, depending on the geometry of the deck, and even regions. 


About the Speaker: Javier Martinez, born in Madrid, Spain, graduated as Naval Architect at the Polytechnic University of Madrid, and thereafter his interest was focused in the transport and installation of oversized pieces, as in offshore as in onshore sectors. In 1983, he founded the company LASTRA in Spain. LASTRA specialized in the engineering and final installation of heavy equipment which couldn’t be installed by a crane. He was involved in the design of new tools and concepts of skidding and lifting.  Around the end of the 80’s, vital civil projects were performed in the European Community, which gave rise to the Universal Exhibition at Sevilla, and the Olympic Games in Barcelona. LASTRA designed and implemented innovative solutions, transferring such knowledge and experience to other countries. In 1991, LASTRA was sold to the Australian Industrial Group BRAMBLES and later on to UK ALE. Both companies gave the financial support needed to continue with the development and new designs. In January 2020 ALE was sold to MAMMOET where J. Martinez is the Global Commercial Director.


About the Moderator: Rafael Martinez was born in Madrid in 1979. He graduated as BEng in Civil Engineering by the Universidad Politecnica de Madrid in 2004. His whole career has been related to the civil engineering business, starting in with Spanish civil contractor Acciona. In 2007 he joined former ALE Lastra, guiding his professional activities to the applications of heavylifting for civil projects, and showing from the beginning a particular interest in bridge construction by heavlifting methodologies. He was Project Engineer at ALE Lastra during 4 years and was involved in landmark projects such as the Bridge Pavilion in Zaragoza by Zaha Hadid, and many other bridge launching jobs, among other heavylifting projects. Later on and still with ALE Lastra, he oriented his career into a commercial role focused on the civil market. In 2014 he joined Mammoet, being first Account Manager and afterwards and for the last couple of years, Manager of the Spanish Branch. In 2020, after the acquisition of ALE by Mammoet, Rafael met up again with his former ALE Lastra colleagues where developed many of his skills in civil heavylifting. Currently he is responsible for civil market commercial activities within Mammoet.



IABSE Discussion: Pure tension! Two bridges in the heart of the new A5 motorway north of Vienna


Speaker: DI Dr. Michael Kleiser, ASFINAG Baumanagement GmbH

Date: 17 December 2020, 14-15.00 Hrs CET

Organised by: IABSE Austrian Group.


Abstract: At the end of 2017, ASFINAG erected two new bridges in the immediate vicinity of the north part of Vienna, which generated tension in different ways. The “Satzengrabenbrücke” is designed as an integral structure and contains new, maintenance-free roadway crossings, consisting of precast concrete elements placed next to one another that distributes the temperature-related displacements evenly over the asphalt above. This way, the stresses in the asphalt are limited to a tolerable level so that it remains free of cracks. Furthermore, the overpass bridge “A5.Ü20”, as an inclined post construction, triggers tension in the psychological sense of perception. A dynamic play of shapes with inclines and curvatures, which visually underpin the force transfer of the bridge, increases the overall expression and, thus, sets an accent in the middle of the new A5 north / Weinviertel motorway.


Spannung Pur! - Zwei Brücken im Herz der neuen A5 nördlich von Wien

DI Dr. Michael Kleiser, ASFINAG Baumanagement GmbH


Kurzfassung: Die ASFINAG errichtete Ende 2017 zwei neue Brücken in unmittelbarer Nachbarschaft im Norden Wiens, die in unterschiedlicher Weise Spannungen erzeugen. Die als integrales Tragwerk konzipierte Satzengrabenbrücke beinhaltet neuartige, wartungsfreie Fahrbahnübergänge, die die temperaturbedingten Verschiebungen durch aneinander gereihte Betonfertigteile gleichmäßig auf den darüber liegenden Asphalt verteilen. Dadurch werden die Spannungen im Asphalt auf ein erträgliches Maß begrenzt, sodass dieser rissefrei bleibt. Des Weiteren löst die Überführungsbrücke A5.Ü20 als Schrägstielkonstruktion Spannung im wahrnehmungspsychologischen Sinn aus. Durch ein dynamisches Formspiel mit Schrägen und Krümmungen, die die Kraftabtragung der Brücke visuell untermauern, wird der Gesamtausdruck gesteigert und somit ein Akzent in der Mitte der Neubaustrecke A5 Nord/Weinviertler Autobahn gesetzt.