Upcoming IABSE Webinars
Do you wish to sponsor any of these webinars? For more information, contact: sissel.niggeler@iabse.org

IABSE Webinar: The Chirajara Bridge Collapse

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

Webinar Details and Registration Link: Click Here

 

After registering you shall receive the Zoom meeting link, before the webinar.

 

Presenters:

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.

 


IABSE Webinar: Concrete Plasticity – A Historical Perspective

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

Webinar details and Registration Link: Click Here

 

After registering you shall receive the Zoom meeting link, before the webinar.

 

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: Risk Management of Large Scale Projects

Date: 24 June, 2021, 13-14 hrs (CET).

Webinar details and Registration Link: Click Here

 

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: Resilience-Based Management of Bridge Portfolios in Seismic Regions

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

Webinar details and Registration Link: Click Here

 

After registering you shall receive the Zoom meeting link, before the webinar.

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.