摘要
对8个按中国规范设计的不同层数、不同设防烈度的预压装配式框架结构中的梁柱节点进行有限元分析,根据有限元分析得到的各节点截面弯矩-转角曲线计算其初始转动刚度和定义了预压装配式梁柱节点的塑性铰骨架曲线。在此基础上分别对8个预压装配式框架结构在倒三角分布和均匀分布两种水平侧向力分布模式下进行了Pushover分析,研究了不同分布方式对预压装配式框架结构Pushover分析结果的影响。通过能力谱法得到了各结构在小震和大震下的最大层间位移角,结果表明预压装配式结构能够满足抗震规范中关于小震和大震下的位移限值要求。根据Pushover能力曲线得到整体抗震性能系数,给出了结构超强系数、反应修正系数、位移放大系数的建议值,可为预压装配式框架结构的设计提供依据。
In this paper,through the finite element analysis of the beam-column joints in 8 post-tensioned unbonded precast concrete frame structures with different layers and different fortification intensity designed in accordance with Chinese code,the initial rotational stiffness of each beam-column node is obtained,and the plastic hinge skeleton curve of·this type of structure is defined.Based on the defined plastic hinge,pushover analysis of 8 post-tensioned unbonded precast frame structures under two different lateral force distribution modes is carried out.The influence of different distribution methods on Pushover analysis results of pre-compressed frame structure is studied.The results show that this type of structure can meet the displacement limit requirements of the code.The seismic performance factor is obtained according to the analysis results,and the recommended value is given,which can provide the reference for the design of post-tensioned unbonded precast frame structure.
作者
符景豪
李静
FU Jinghao;LI Jing(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510460,China)
出处
《建筑结构》
CSCD
北大核心
2021年第S01期1178-1186,共9页
Building Structure
关键词
预压装配式框架结构
塑性铰本构曲线
PUSHOVER分析
整体抗震性能系数
post-tensioned unbonded precast concrete frame structure
skeleton curve of plastic hinge
pushover analysis
seismic performance factor
