摘要
为了进一步研究后张预应力装配耗能框架(Post-Tensioned Energy Dissipating,PTED框架)的抗震性能,开展了基于增量动力分析方法(IDA)的地震易损性分析和抗倒塌研究。以直接基于位移设计的四层三跨PTED框架为基本原型,建立了Open SEES非线性分析模型,并选取10条地震动记录对其进行IDA分析。结果表明,不同于普通钢筋混凝土框架的单项损伤指标,PTED结构需考虑最大预应力筋合力和最大层间位移角的双项损伤指标。结合IDA分析结果建立了地震需求模型,得到了结构模型的易损性曲线和抗倒塌概率曲线。PTED框架在设防大震作用下倒塌概率为0.2%,表明其具有较好的抗倒塌能力。
To further study the seismic performance of the Post-Tensioned Energy Dissipating frame（ PTED frame）,the analysis of seismic fragility and collapse resistance of the PTED frame are carried out based on Incremental Dynamic Analysis method（ IDA）. A basic prototype of four-storey and three-span PTED frame is designed with DDBD（ Direct Displacement-Based Design） method. The nonlinear analytical model is constructed using Open SEES software. Ten records of ground motion are selected as the input of the IDA.The results show that the double damage measure for PTED frame should contain both the maximum force of prestressing tendons and the maximum story drift angle,instead of single damage measure used in reinforced concrete frame. According to the IDA results,the probabilistic seismic demand model is established to obtain the fragility curve and the collapse probability curve. The collapse probability of PTED frame under rare earthquake is 0. 2%,which indicats that the PTED frame has good anticollapse ability.
出处
《工程抗震与加固改造》
北大核心
2016年第4期126-132,共7页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金项目(51308297)
江苏省自然科学基金项目(BK20130408)
南京理工大学研究生创新计划
