Investigation of the Performance of Self-Centering Steel Plate Shear Walls Under Fire Loading

A potential multi-hazard scenario for buildings is the sequential occurrence of fire and earthquake. this scenario is possible if an initial seismic event triggers fire and a subsequent aftershock occurs. to study the post-fire seismic performance, a numerical study is presented on a two-story self-centering steel plate shear wall. this system consists of post-tensioned elements such as strands and bars to reduce the residual drift in the structure and energy dissipator devices to dissipate the seismic input energy. this paper assesses the seismic behavior of self-centering steel plate shear walls after fire loading and proposes modifications to their structural details so that fire robustness can be achieved in addition to seismic resilience. this system is simulated using the finite element method (fem) and is verified based on available experimental results. then, fire loading is applied, and results are compared for protected and unprotected models. results showed that protecting steel members with fire-resistant coating can significantly improve the post-fire seismic performance of the system. the protected models reveal higher lateral strength relative to unprotected models with an increase in temperature. the maximum lateral strength of the self-centering steel plate shear wall model with shielded steel web panels, the model with shielded strands, and the model with both shielded strands and steel web panels are respectively 56%, 21%, and 61% greater than the model without fire-resistant coating at 700 °c.