型钢混凝土剪力墙变形指标限值研究  

Study on deformation limits of SRC shear walls

作　　者：季静[1,2] 吴智辉 符东龙 韩小雷[1,2] JI Jing;WU Zhihui;FU Donglong;HAN Xiaolei(State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,China;School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]华南理工大学亚热带建筑科学国家重点实验室,广东广州510640 [2]华南理工大学土木与交通学院,广东广州510641

出　　处：《建筑结构学报》2022年第3期118-127,147,共11页Journal of Building Structures

基　　金：亚热带建筑科学国家重点实验室基金项目(2018ZC05);广州市科技计划项目(201904010221)。

摘　　要：为更好地评估型钢混凝土(SRC)剪力墙的抗震性能,对SRC剪力墙的破坏形态划分准则、性能状态划分方法及各性能状态的变形限值进行研究。基于收集的56片SRC剪力墙低周往复加载试验结果,以剪跨比和弯剪比为控制参数,将SRC剪力墙划分为弯曲控制和剪切控制两类破坏形态,分别提出对应的划分准则。根据DBJ/T 15-151—2019《建筑工程混凝土结构抗震性能设计规程》,将SRC剪力墙划分为7个抗震性能状态。依据试验中试件的骨架曲线,定义3个关键性能点,提出SRC剪力墙各性能状态的变形指标限值的确定方法。对56片剪力墙的试验数据进行回归分析,依据回归结果建立SRC剪力墙的变形指标限值体系,并进行可靠性分析。结果表明:所给出的破坏形态划分方法能够较好地预测构件破坏形态,建立的SRC剪力墙变形指标限值体系的保证率在合理的范围之内,其中性能点1(无损坏)和性能点5(比较严重损坏)的失效概率均小于设定的最大失效概率(35%),性能点6(严重损坏)的失效概率为31%(弯曲控制)和41%(剪切控制)。In order to enhance the reliability of the existing seismic performance evaluation approaches for steel reinforced concrete(SRC)shear walls,the failure mode classification criteria,as well as the classification and deformation limits of each performance state for SRC walls were investigated in this study.Based on the collected cyclic experimental results on 56 SRC shear walls,SRC shear walls were first divided into flexural-critical failure and shear-critical failure,and the corresponding classification criteria were then proposed on the basis of shear span-ratio and bending-shear ratio.According to DBJ/T 15-151—2019‘Specification for performance-based seismic design of reinforced concrete building structure’,seven performance states for SRC shear walls were proposed.Based on skeleton curves of experimental members,the definition of three key performance points and the determination method of deformation limits for each performance state were put forward.Through regression analysis of the collected 56 SRC shear walls,the deformation limits of SRC shear walls were identified,which then were checked by reliability analysis.The results show that the proposed failure modes classification criteria and deformation limits of SRC shear walls work well.More specially,the probabilities of exceedance for the performance point 1(intact)and performance point 5(severe-moderately damaged)are less than the set allowable probability(35%),while the probabilities of exceedance for the performance point 6(severe damaged)are 31%(flexural-critical failure)and 41%(shear-critical failure),respectively.

关 键 词：型钢混凝土剪力墙 变形指标限值 破坏形态 回归分析 

分 类 号：TU398.9[建筑科学—结构工程]