Experimental study on seismic performance of ancient wooden buildings considering the influence of geshan

Abstract

The geshan is an essential component of ancient wooden buildings. They provide ventilation and lighting while playing a significant role in the structure's seismic performance. This article presents the results of quasi-static tests conducted on three sets of four-column lifting beam 1:2 scale test specimens. The study investigated the influence of geshan on structural torsion, joint tenoning, column root sliding, and lifting deformation characteristics. Additionally, the study examined the impact of these characteristics on seismic performance, including strength, stiffness, and energy dissipation capacity. The results indicate that the geshan had positive and negative effects on the structure. While they reduced the torsion of the structure during loading and prevented the pullout of the dovetail joints, they also exacerbated the lifting and slipping of the column root. The geshan increased the structure's stiffness, bearing capacity, and energy dissipation capacity, but reduced its ductility. The article analyzes the relationship between the initial damage, deformation characteristics, and stress performance of geshan and structures, highlighting their mutual influence. The research results can be used as a reference for accurately evaluating the seismic performance of ancient wooden buildings with geshan.