Effect Of Column Removal Scenarios on The Robustness of Steel Plate Shear Wall Structures

Abstract

The structural reliability of Steel Plate Shear Wall (SPSW) systems when subjected to abnormal or extreme loading conditions has gained significant attention in contemporary structural engineering research. This investigation focuses on assessing the behavior of SPSW buildings under sudden column loss scenarios, with particular emphasis on progressive collapse resistance and structural robustness. The unexpected removal of a major vertical load-carrying member can cause rapid force redistribution within the structural system, which may result in localized or widespread collapse if adequate redundancy is not present.

To study this response, detailed analytical models of multi-storey SPSW buildings are developed and evaluated using nonlinear static (pushover) and nonlinear dynamic analysis procedures in ETABS. Different column removal cases—namely corner, edge, and interior columns—are simulated to examine variations in structural behavior. Key response parameters such as plastic hinge development, internal force redistribution, lateral displacement patterns, and energy absorption capacity are carefully monitored.

The comparative assessment highlights the inherent redundancy and alternative load path mechanisms provided by SPSW systems. Special attention is given to the role of infill steel plates in transferring forces after column removal, as well as to the effects of structural parameters including storey height, plate thickness, and boundary frame rigidity. The analysis indicates that SPSW structures possess considerable ductility and redistribution capability; however, their robustness is strongly influenced by thelocation of the removed column and the continuity and stiffness of surrounding boundary elements.

Overall, this study enhances the understanding of SPSW performance under progressive collapse scenarios and offers valuable insights for strengthening design strategies aimed at improving structural resilience against extreme events.