【摘要】 针对平面不规则混凝土框架结构,考虑地震作用对其产生的附加扭转振动效应,提出了两种计算侧向力分布的方法。通过对一平面不规则框架结构进行推覆分析,得到各楼层侧移、层间侧移角和塑性铰分布情况,并与时程分析结果进行了比较分析。结果表明,两种方法推覆分析得到的塑性铰分布情况与时程分析得到的情况相符合,楼层侧移和层间位移角与时程分析结果吻合也较好,并且从结果精度上看,分层法的误差要小一些。更多还原

【Abstract】 Considering the torsion effects caused by the earthquake load,two methods calculated the lateral load distribution for asymmetric structures are established.Through pushover analysis and nonlinear time-history(NTH) analysis of a R C asymmetric structure,the validity of the procedure is validated by comparing response quantities such as story displacement,inter-story drift ratio and distribution of plastic hinges.It is shown that the distribution of plastic hinges obtained from pushover analysis is accorded with that of NTH analyis under practical earthquake load;story displacement and inter-story drift ratio are also in accord with the result of NTH analysis;and precision of the two methods is better enough to evaluate the capacity of asymmetric structures in pushover analysis.更多还原