某框架结构教学楼采用BRB支撑加固的抗震性能分析

Analysis on Seismic Performance of A Frame Structure Teaching Building Reinforced With BRB Support

本文以某中学教学楼为研究对象,通过多遇地震作用下的振型分解反应谱法分析和弹性时程分析,罕遇地震作用下的弹塑性时程分析,探究了BRB构件对结构抗震性能的影响。结果表明通过合理的布置BRB构件,可以减小结构的自振周期,有效地抑制结构的扭转效应,显著地增加结构的刚度,改善地震中结构的变形情况,为结构增加了一道抗震防线,提高了结构的整体抗震性能。

This paper takes a middle school teaching building as the research object. Through the analysis of mode decomposition response spectrum method and elastic time history analysis under frequent earthquakes, and elastoplastic time history analysis under rare earthquakes, this paper explores the impact of BRB components on seismic performance of the structure. The results show that by rationally arranging the BRB components, the natural vibration period of the structure can be reduced, the torsional effect of the structure can be effectively suppressed, the stiffness of the structure can be significantly increased, the deformation of the structure during the earthquake can be improved, and an earthquake resistance line can be added to the structure. Thus, the overall seismic performance of the structure is improved.