基于能量原理的钢筋混凝土框架结构层间弹塑性位移求解

本文按照我国现行《建筑抗震设计规范》设计了三个层数分别为4、7和10层的钢筋混凝土框架结构。利用能量法对各框架结构按等效单自由度体系计算了其滞回输入能;利用pushover方法分析了钢筋混凝土框架结构的层间能量分布规律,通过与非线性动力时程分析结果进行比较,证明该法是可行的;利用文献[1]中楼层弹塑性变形耗能与弹塑性层间位移的关系求出各框架结构的层间弹塑性位移,并与现行《建筑抗震设计规范》中简化计算方法的计算结果进行了对比。

Computation of Inelastic Story Drifts of Reinforced Concrete Frames Based on Energy Concept

Three reinforced concrete frames,which had 4,7 and 10 stories respectively were designed according to the current chinese code for seismic design of buildings.Equivalent single-degree-of-freedom(SDOF) systems were used to estimate the hysteretic energy demands of these frames in order to simplify the computational effort.Pushover analysis was used to get the distribution of hysteretic energy in each story,and the possibility of the method was provedly comparing with the analysis of nonlinear clynovmic time-history.The relationship between hysteretic energy and elastic-platics story drift as mentioned in reference[1] was used to get the inelastic story drifts of reinforced concrete frames,and the results were compared with the simplified method of the current chinese code for seismic design of buildings.