带填充墙自复位预应力混凝土框架结构的抗震性能分析  

ASEISMIC ANALYSIS OF SELF-CENTERING PRESTRESSED CONCRETE FRAME STRUCTURE WITH INFILL WALLS

作　　者：黄林杰 周臻[1] HUANG Lin-jie;ZHOU Zhen(Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096

出　　处：《工程力学》2018年第10期162-171,共10页Engineering Mechanics

基　　金：国家自然科学基金项目(51208095);江苏省"青蓝工程"项目;江苏省"六大人才高峰"项目(JZ-003);江苏省普通高校研究生科研创新计划项目(KYLX15_0080)

摘　　要：自复位预应力混凝土(SCPC)框架结构中布置填充墙可以有效提高结构刚度和耗能能力。从我国规范中选取4种强度不同的填充墙分别布置于一SCPC框架结构中,利用OpenSees分析软件分别建立其有限元模型。首先对SCPC框架和4个带填充墙自复位预应力混凝土(SCPC-IW)框架有限元模型进行低周往复循环加载分析和静力推覆分析,进而选取15条地震动记录调至罕遇地震水平分别输入5个有限元模型进行动力分析,以研究填充墙对SCPC框架结构抗震性能的影响。研究结果表明:布置填充墙可以明显提高结构的初始刚度、耗能能力以及减小结构动力响应,但同时也提高了震后结构的残余变形。随着填充墙材料强度的提高,结构震后残余变形的增加幅度远高于其动力响应的降低幅度。对SCPC框架结构布置强度为混凝土强度15%~24%的填充填可以有效提高结构刚度和耗能能力,降低结构的动力响应,同时又能够保证结构残余层间位移角在罕遇地震水平下不超过可修状态限值0.4%。The stiffness and energy dissipating capacity of self-centering prestressed concrete(SCPC)frame structures can be improved by the arrangement of infill walls.4 kinds of infill walls with different strength were selected from Chinese design code to install into a SCPC frame structure.The numerical models of the SCPC frame structure and the 4 SCPC frame structures with infill walls were established via the finite element software,OpenSees.Firstly,the low reversed cyclic loading analysis and pushover analysis were carried out on the SCPC frame structure and the 4 SCPC frame structures with infill walls,and then the dynamic analysis under severe earthquake actions of 15 suits ground motion records were carried out on the 5 models to investigate the influence of infill walls on aseismic performance of SCPC frame structures.The comparison of the results show that:the initial stiffness,energy dissipating capacity of structures are improved,and the dynamic responses are decreased,but residual deformation are enhanced due to the presence of infill walls.With the strength increase of infill walls,the increased amplitude of residual deformation is far higher than the decreased amplitude of dynamic response.It is suggested that:the stiffness and energy dissipating capacity of SCPC frame structures can be improved,whole dynamic response can be reduced effectively,and the residual inter-story drift ratio can be controlled to less than 0.4%,the threshold value of repairable limit state,under severe earthquake actions by the arrangement of infill walls,the strength of which is above 15%~24%of concrete strength.

关 键 词：自复位 预制 预应力混凝土框架 填充墙 残余变形 动力响应 

分 类 号：TU352.11[建筑科学—结构工程] TU375.4