Seismic Axial Collapse of Shear Damaged Heavily Reinforced Shear Walls Experiencing Cyclic Tension–Compression Excursions: A Modified Mohr’s Axial Capacity Model

Abstract

A special class of reinforced concrete (RC) shear wall is identified with short shear span, attributed to the high coupling degree in the elastic design of tall buildings located in low-to-moderate seismicity regions. The short shear span characteristic precludes plastic hinge formation and increase the susceptibility of shear failure during seismic events. It is noted that shear damage alone does not indicate collapse by default. This paper formulates a Modified Mohr’s Axial Capacity Model associated with out-of-plane buckling, to quantify the residual axial capacity of shear-damaged heavily reinforced walls. The model was benchmarked against four walls previously tested to axial failure.