单层单跨轻型变截面门式刚架结构抗震性能有限元分析  

Finite element analysis for seismic performance of a single-story single-bay light-weight portal frame with tapered members

作　　者：王振山[1] 苏明周[2] 郭宏超[1] 

机构地区：[1]西安理工大学土木建筑工程学院,陕西西安710048 [2]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《西安理工大学学报》2014年第2期157-162,共6页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(51308454);中国博士后第54批面上项目基金资助项目(2013M542371);陕西省科技厅自然科学基金资助项目(2013JQ7006)

摘　　要：基于门式刚架1/3缩尺模型整体拟静力试验的结果,对全尺寸门刚结构进行有限元分析,得到了荷载-位移、骨架和刚度退化等曲线变化关系,并对结构的延性和耗能能力进行分析,发现全尺寸结构较缩尺模型变形和耗能能力有所提高。通过底部剪力法对结构的整体抗震性能进行的分析表明:虽然全尺寸门式刚架结构延性和耗能能力较低,但由于自身承载能力较高在多遇地震作用下,结构仍处于弹性阶段,且安全裕度较大。研究对相关规范的制定具有一定的指导意义。Based on the pseudo-static experimental results of 1/3reduced scale model portal frame with tapered members,a finite element analysis is made of the full-size structure to obtain the load-displacement hysteretic curves,skeleton curve and stiffness degradation curve.Simultaneously,the ductility and energy dissipation capacity of the structure are analyzed.It is found that the seismic performance of full-size structure is better than the reduced scale model＇s.By the base shear method,the seismic performance of the full-size portal frame is evaluated.The analysis results indicate：the ductility and energy dissipation capacity of the portal frame are poor,but the bearing capacity of the structure is higher;in the frequent earthquake action,the structure is still in the elastic stage and the safety margin is larger.The research results are of the guiding significance for working out the related specifications.

关 键 词：门式刚架 抗震性能 有限元分析 延性 耗能能力 

分 类 号：TU392.5[建筑科学—结构工程]