8.5度设防区剪力墙结构层间位移角限值探讨  

Discussion on the story drift ratio limits of shear wall structures in seismic fortification areas with 8.5 degree earthquake

作　　者：季静[1,2] 林浩宇 付豪 吴梓楠 韩小雷[1,2] JI Jing;LIN Haoyu;FU Hao;WU Zinan;HAN Xiaolei(State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,Guangdong,China;School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641,Guangdong,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：《地震工程学报》2023年第2期251-259,共9页China Earthquake Engineering Journal

基　　金：广州市科技计划项目重点研发计划(202103000038);广东省自然科学基金项目(2020A1515010739)。

摘　　要：为满足小震作用下结构层间位移角限值的要求,抗震设防高烈度区设计的结构竖向构件多,截面尺寸大,影响建筑使用空间。控制小震作用下的层间位移角除满足舒适度、装饰结构和机械设备正常使用的需求外,主要目的是确保结构大震不倒。根据新疆喀什地区(8.5度设防)128条强震地震动和当地实际工程,参照现行不同规范对层间位移角限值的规定,以层间位移角和高度为控制参数,设计6个剪力墙结构模型,采用基于构件变形的抗震性能评估方法研究大震作用下结构的安全性。结果表明:6个剪力墙结构在8.5度大震作用下均满足“大震不倒”的要求,且在两倍大震作用下具有合理的屈服耗能机制。建议小震作用下新疆喀什地区剪力墙结构的弹性层间位移角限值放松至1/500。To meet the requirements of the story drift ratio limits of structures impacted by small earthquakes,the section sizes of many vertical members are large,especially in seismic fortification areas with high seismic activity.In addition to meeting the requirements of comfort and normal use of decorative structures and mechanical equipment,the main purpose of controlling the story drift ratio under a small earthquake is to ensure that the structure will not collapse under a large earthquake.According to the data of 128 strong earthquake waves in Kashgar,Xinjiang(intensity 8.5 degrees)and local projects,and by referring to the provisions of different codes on story drift ratio limits,six shear wall structural models are designed by taking the story drift ratio and height as control parameters.The seismic performance evaluation method based on member deformation is used to study structural safety under large earthquakes.Results indicate that the six shear wall structures meet the requirement of“no collapse under large earthquakes”under the action of an 8.5-degree earthquake and possess a reasonable yield energy dissipation mechanism under twice the impact.The limit value of the elastic story drift ratio of the shear wall structure in Kashgar(Xinjiang,China)can be relaxed to 1/500 under small earthquakes.

关 键 词：高烈度区 剪力墙结构 层间位移角限值 构件变形 抗震性能 

分 类 号：TU973[建筑科学—结构工程]