To be held on Monday, January 18th, 2021, 16:00-17:00
via zoom meeting - link
The Contribution of Masonry Infill Walls to Prevent Progressive Collapse of RC Frames - From Large-Scale Tests to Detailed Simulations of Shear Critical Frames
Alex Brodsky, PhD
Department of Civil and Mineral Engineering, University of Toronto, Canada
Structural systems comprising reinforced concrete (RC) frames with masonry infill walls are widely implemented in residential and public buildings. The masonry infill wall is usually considered as a non-structural element. Yet, even if not meant to, it plays a major role in the structural response in the case of an extreme event such as local impact, blast or earthquake. Extensive efforts have been invested in studying the frame-infill wall composite behaviour under the action of lateral loads to simulate earthquake actions. Extreme events may also severely damage a supporting frame column and lead to progressive collapse. Opposed to earthquake events, the case of loss of a supporting column that is associated with vertical gravitational loading has gained considerably less attention. The results of large-scale laboratory tests on RC infilled frames subjected to vertical displacement field because of supporting column failure will be presented. In addition, the presentation will be discussing a unique testing facility that allows measuring the infill-frame interaction. Then, a multi-scale modelling technique for the modelling of RC infilled frames using a detailed non-linear response of the RC elements using the Modified Compression Field Theory (MCFT) will be presented and its applications for Hybrid-Multi-Platform simulations to account frame failures, in particular brittle shear failures.
About the speaker:
Alex Brodsky is a Lyon Sachs Postdoctoral Fellowship at the University of Toronto, Canada. He obtained his B.Sc. (Summa Cum Laude) and Ph.D. (direct track) in Structural Engineering from Technion. In his Ph.D. he investigated the behavior of masonry infilled frame-structures to reduce the likelihood of Progressive collapse. His research focuses on the behavior of structures under extreme loads and conditions. Alex has extensive experience in large scale-experimental tests and failure investigations of structures. In his current research, Alex deals with multi-scale simulations, ductile failures in reinforced concrete and prestressed concrete elements.