摘要
以郑州市上街区某小学综合办公楼5层钢筋混凝土框架结构实际工程为背景,采用有限元软件Sap2000对该结构进行了静力弹塑性分析,通过计算了解了该结构在不同地震动强度作用下的抗震性能水准。研究表明:该结构能够满足抗震规范规定的"小震不坏"和"大震不倒"的性能要求。从推覆过程中观测到的梁柱塑性铰发展情况来看,结构破坏基本上呈"梁铰机制",满足规范关于"强柱弱梁"的设计要求,说明结构原设计总体上是比较合理的。但是从分析得到的结构各层层间位移角以及各层梁柱塑性铰发展情况来看,结构第3层与4层交接处抗侧刚度突变,属于结构中相对薄弱部位,在构造上应予加强。
A study on was carried out. Using seismic performance of a five-story reinforced concrete frame structure in Zhengzhou City Sap2000 software to establish the finite element model, the nonlinear static analysis was carried out to evaluate the seismic performance of the building structure under various ground motion intensity. The resuits show that, the designed structure can satisfy the Three-level performance objectivity of the seismic code provi- sions. Observed from the process of plastic hinges of the structure during pushover analysis, the structural damage basically tended to beam hinge mechanism＂, which meets the seismic code requirements of design about ＂strong column and weak beam＂, explains the structure is reasonable in general. But the stories with sudden change in the lateral stiffness of the structure were relatively weak and should be strengthened in detail,
出处
《世界地震工程》
CSCD
北大核心
2015年第3期62-70,共9页
World Earthquake Engineering
基金
河南省教育厅科学技术研究重点项目(13A560672)
2015年度郑州大学土木工程学院校企合作项目
关键词
RC框架结构
PUSHOVER分析
抗震性能评估
塑性铰
reinforced concrete frame structure
pushover analysis
seismic performance evaluation
plastic hinge
