锈蚀钢筋混凝土框架结构抗震性能Pushover分析  

Seismic Performance Analysis of Corroded Reinforce Concrete Frame Structures Using Pushover

作　　者：张猛[1] 李瑶亮[1] 赵桂峰[1] 李大望[2] 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]广东省滨海土木工程耐久性重点实验室,深圳大学,广东深圳518060

出　　处：《工程抗震与加固改造》2016年第3期35-42,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(51520105012;51278303);广东省滨海土木工程耐久性重点实验室开放基金项目(GDDCE12-06);河南省教育厅科学技术研究重点项目(13A560672)

摘　　要：以某六层三跨RC框架结构为例,在对锈蚀构件的材料力学性能劣化处理的基础上,采用SAP2000结构分析软件静力弹塑性分析方法,对不同锈蚀工况下的RC框架结构抗震性能进行分析,得到不同锈蚀工况下RC框架结构在罕遇地震下的抗震性能指标退化规律。研究表明:纵筋锈蚀将导致RC框架结构抗震性能退化,而且随着锈蚀率的增大,结构的抗震承载力退化效应愈加显著,楼层层间位移角增加;同时锈损结构的塑性铰(梁铰/柱铰)发展速度加快,程度亦加深,使得结构在相同地震作用下变形加剧,不利于结构抗震性能的发挥。A six floors three span RC frame structure is taken as an example,on the basis of the degradation of material mechanical performance,the seismic performances of RC frame structures under different corroded type are analyzed by using the pushover analysis method with the help of SAP2000,and the degradation of seismic performance indicators under severe earthquake is understood. The result shows that,the seismic performance of RC frame structures will be degradated because of the corrosion of longitudinal rebars,and the more corrosion rate,the more degradation of seismic performance and interlayer displacement angle; at the same time,the development of plastic hinges（beam hinges or column hinges） will rapidly and serious,which leads to a more deformation of structures under serious earthquake,and this is bad to the structrues when faceing earthquake.

关 键 词：钢筋混凝土框架 钢筋锈蚀 退化 抗震性能 

分 类 号：TU375.4[建筑科学—结构工程]