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

 

Upcoming Webinars:

 

 

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

 

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

Register (for free) here: Click Here

 

Speakers:
Torben Bilgrav Bangsgaard, Chief Consultant, Monitoring & Analyses 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 & Analyses of Existing Structures, Rambøll Denmark
Expert in load capacity assessment, rehabilitation and strengthening of existing bridges and other structures, including advanced modelling and analysis of both steel and concrete structures by means of numerical methods and probabilistic approaches.

 

Moderator:
Jan Vig Nielsen, Head of Department, Monitoring & Analyses of Existing Structures, Rambøll Denmark

 

Summary 


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. 

 

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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.

 

This course will focus on how to calculate the building dynamics correctly and how to plan and build according to EN 1998.

The course will take place in blocks in November and December 2021, the course language is German. For more details, course program and registration, please visit the website of Austrian Standards plus GmbH: https://austrianstandards.swoogo.com/705967