Advances in Structural Engineering Research

Full Session with Abstracts

337103-6 - Predicting the Performance of a 13-Foot-Thick Shear Experiment without Stirrups

Friday, April 20
1:30 PM - 3:00 PM
Location: 202CD

How does this session impact and improve the Structural Engineering Profession?
Performance Based Design is an important area of structural design and one that can be expected to grow in the future. The ability (or not) to predict the behaviour of a simple one-way slab system should give us confidence (or not) in how this process goes forward.

Abstract:
In some design situations there are demands for very thick one-way slabs to be constructed out of reinforced concrete without stirrups. The ACI Shear design equations suggest that there is no significant size effect in shear while other codes suggest that there is a significant one. To find out which prediction is more accurate, a 13 foot thick 65 foot long shear experiment was performed in Toronto in 2015. Prior to the test being done, predictions were requested for what the behaviour of the test should be. A total of 66 predictions were obtained, 33 from industry and 33 from academia. This presentation and paper will summarize the results of the test and discuss the quality of the predictions with particular emphasis placed on conclusions that are relevant for performance based design. The presentation will include information about two practical structures with details similar to that tested and thus will be relevant to design engineers.

People who see this presentation will learn to be careful when modelling members of this depth as the ACI Code is dangerously unsafe it its 2014 iteration. Also it will be clear that the profession needs to do better with regard to performance-based situations as the quality of the predictions was poor.

Evan C. Bentz

Associate Professor
University of Toronto

Evan Bentz created the current equations of the simplified MCFT used for shear design provisions in the AASHTO LRFD bridge design specifications, the CSA building and bridge code, the Australia bridge code as well as the 2010 fib model code. He has written software such as Response-2000 which has been downloaded by 80,000 engineers in 154 countries around the world. He has won three teaching awards as well as the most recent ACI design award.

Presentation(s):

Send Email for Evan Bentz

Evan C. Bentz

Associate Professor
University of Toronto

Evan Bentz created the current equations of the simplified MCFT used for shear design provisions in the AASHTO LRFD bridge design specifications, the CSA building and bridge code, the Australia bridge code as well as the 2010 fib model code. He has written software such as Response-2000 which has been downloaded by 80,000 engineers in 154 countries around the world. He has won three teaching awards as well as the most recent ACI design award.

Presentation(s):

Send Email for Evan Bentz


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337103-6 - Predicting the Performance of a 13-Foot-Thick Shear Experiment without Stirrups



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