Influence of Geometric Configuration on the Seismic Response of T-Shaped Reinforced Concrete Shear Walls in Steel High-Rise Buildings

T-shaped shear walls, due to their three-dimensional behavior, effectively enhance seismic resistance in both principal directions of high-rise buildings. Their performance is strongly influenced by geometric parameters, particularly the flange length-to-thickness ratio and web position. In this study, the seismic behavior of steel high-rise buildings equipped with reinforced concrete T-shaped shear walls was investigated for various flange length-to-thickness ratios, and a comparative assessment with ┼-shaped shear walls was conducted. Linear dynamic response spectrum analysis was performed on ۱۰-, ۲۰-, and ۳۰-story buildings. Maximum story displacements and inter-story drifts were evaluated. The results indicate that with an increase in the flange length-to-thickness ratio, maximum story displacement decreases by ۷–۲۲%, and with a further increase in the ratio, the reduction reaches ۲۰–۴۴% compared to the baseline model across different building heights. Furthermore, T-shaped shear walls consistently outperform ┼-shaped configurations, reducing maximum story displacement by ۳۰, ۳۳, and ۴۳% for ۱۰-, ۲۰-, and ۳۰-story buildings, respectively. These findings highlight the significant influence of geometric parameters on seismic performance and provide practical guidance for preliminary design and optimization of shear walls in high-rise steel structures.

Keywords:

Geometric configuration , Response spectrum analysis , High-rise building , T-shaped shear wall