EXploring the Impact of Concrete Panel Thickness on Post-Fire Shear Capacity of Composite Shear Walls: A Numerical Investigation

This paper presents an investigation into the influence of concrete panel thickness (CPT) on the post-firebehavior of composite steel plate shear walls (CSPSW). The concrete panel (CP) within the CSPSW servesa crucial role in augmenting the shear capacity of this lateral-resisting system by mitigating out-of-planebuckling of the steel plate. However, a fundamental inquiry arises: does this component contribute toenhancing the shear capacity of the steel plate (SP) by mitigating fire-induced damage? To address thisquestion, a series of numerical CSPSW models at a scale of 1:3 were developed, featuring varying CPTs of80, 100, 120, 150, and 200 mm, and subsequently subjected to cyclic loading following 2 hours of fireexposure. Fire simulations were conducted utilizing coupled temperature-displacement analysis, andsubsequent to adjustments in mechanical properties due to fire exposure, the CSPSWs underwent cyclicquasi-static loading. The findings indicate that the CP effectively functions as a protective cover for the SPowing to the low thermal conductivity of concrete. Notably, an increase in CPT from 120 mm to 200 mmresulted in a significant enhancement of the final post-fire shear capacity, exhibiting a 48.70% increase.

EXploring the Impact of Concrete Panel Thickness on Post-Fire Shear Capacity of Composite Shear Walls: A Numerical Investigation Keywords:

Composite steel plate shear wall , Fire , Thermal analysis , Quasi-static analysis , Abaqus