Numerical and theoretical prediction of punching shear and post-punching strengths for preventing progressive collapse in concrete flat plate structures

Prof Hong Guan

School of Engineering and Built Environment, Griffith University, Gold Coast Campus, Queensland 4222, Australia

Abstract: Progressive collapse is a structural failure that is disproportionate to the initial localised damage, typically triggered by accidental events. While concrete flat plate structures are widely used in modern construction, they are particularly susceptible to punching shear failure - a critical mechanism that can initiate progressive collapse and lead to significant social, psychological, and economic consequences. The post-damage phase is characterised by highly nonlinear behaviour, large deformations, and a dynamic, system-wide response. To better understand these failure mechanisms, we conducted experiments on a range of in-plane restrained slab-column joints and 2×2-bay substructures. Based on the experimental data, 3D nonlinear finite element models were developed and validated. The numerically predicted punching shear and post-punching strengths serve as key indicators of the structural resistance to progressive collapse. Furthermore, parametric studies were performed to support the development of theoretical prediction methods.

Keywords: Progressive Collapse; RC Flat Plate Structures; Punching Shear; Post-punching Behaviour.

Bio: Professor Hong Guan is a leading expert in structural engineering and computational mechanics, with research interests spanning finite element modelling, failure and collapse analysis of concrete and timber structures, bridge deterioration modelling, structural health monitoring, and structural optimisation. She is internationally recognised among the world's top 2% scientists (Elsevier BV) and ranks among the top 10 global researchers in the field of disproportionate/progressive collapse of concrete structures (Scopus). She has authored over 370 technical publications. She currently serves as the Sustainable Construction Theme Leader at Griffith University’s Environmental Research Institute. She is also an appointed member of the ARC College of Experts and a member of the Executive Committee of the Australian Network of Structural Health Monitoring (ANSHM).