Testing and simulation of 3D effects on progressive collapse resistance of RC buildings

Abstract

This paper evaluates the three-dimensional (3D) or slab effects on reinforced concrete (RC) buildings to mitigate progressive collapse, which is caused by the loss of an interior column. Six one-quarter scaled beam-column, or beam-column-slab substructures are tested. These six specimens are categorised into three series (P-, T-and S-series).The test results confirm that transverse beams and RC slabs can reduce the collapse vulnerability of RC buildings effectively. In addition, it is quantified that 3D effects without slab can increase the yield load of the frame by up to 100%, while 3D effects including slab can increase the yield load up by 246 . 2%. This is because the slabs not only increase the bending moment capacity of beam sections working as flanges, but also provide more alternative load paths for load redistribution. RC slab can upgrade the first peak load of the buildings by developing compressive membrane actions, and upgrade the ultimate load capacity of the building during the large deformation stage by developing a tensile membrane action. As the number of tested specimens is relatively small, a series of numerical and parametric studies are carried out to further quantify the 3D or slab effects on RC buildings in resisting progressive collapse.

Experimental study on the progressive collapse behaviour of RC flat plate substructures subjected to corner column removal scenarios

“…Specifically, the ALP method allows the load carrying capacity of a structure to be examined by notionally removing one or several load bearing structural elements. In line with the ALP design method, a number of in-depth studies on the progressive collapse resistance of reinforced concrete (RC) structures under a column removal scenario have been conducted analytically [6][7][8], experimentally [9][10][11][12][13][14] and numerically [15][16][17]. However, these studies have predominately focused on frame systems.…”

Load-resisting mechanism to mitigate progressive collapse of flat slab structures

“…To provide necessary design guidelines for practising engineers to evaluate the vulnerability of structures in mitigating progressive collapse, several design guidelines (ASCE-SEI, 2010;COST Action TU0601, 2008;GSA, 2003;US DoD, 2009) had been proposed in North America and the EU. Moreover, in order to refine the design guidelines, several researchers (Astaneh-Asl et al, 2001;Choi and Kim, 2011;Fu, 2010;Gouverneur et al, 2013;Kim and Yu, 2012;Li et al, 2011;Marjanishvili and Agnew, 2006;Qian and Li, 2011, 2012a, 2012b, 2013a, 2013b, 2014Qian et al, 2014aQian et al, , 2014bSu et al, 2009;Yap and Li, 2011;Yu and Tan, 2014) have investigated the ability of reinforced concrete (RC) moment frames in resisting progressive collapse by numerical or experimental approaches. However, relatively little attention has been paid to flat slab structures in resisting progressive collapse.…”

Effects of Corrosion on Compressive Arch Action and Catenary Action of RC Frames to Resist Progressive Collapse Based on Numerical Analysis

“…For the boundary conditions, a fixed support is assumed at the two side columns. Though the fixed boundary condition would slightly overestimate CAA, the development of TCA associated with large deformation in the beams could be better predicted this way [28]. As an example, the FE model and its mesh of T1 are illustrated in Figure 3.…”