强震下竖向不对称收进高层结构损伤分析  

DAMAGE ANALYSIS OF HIGH-RISE BUILDING STRUCTURES WITH ASYMMETRIC VERTICAL SETBACKS UNDER RARE EARTHQUAKE ACTION

作　　者：黄信 李毅 朱旭东[2] 胡雪瀛[2] 吕杨 HUANG Xin;LI Yi;ZHU Xudong;HU Xueying;LYU Yang(College of Airport,Civil Aviation University of China,Tianjin 300300,China;Tianjin Architecture Design Institute,Tianjin 300074,China;Tianjin Key Laboratory of Civil Structure Protection and Reinforcing,Tianjin 300384,China)

机构地区：[1]中国民航大学机场学院,天津300300 [2]天津市建筑设计院,天津300074 [3]天津市土木建筑结构防护与加固重点实验室,天津300384

出　　处：《工业建筑》2020年第6期79-84,共6页Industrial Construction

基　　金：天津市自然科学基金项目(19JCTPJC53500);天津市教委科研计划自然科学项目(2019KJ123);中央高校基本科研业务费项目(3122018C014)。

摘　　要：某竖向不对称收进高层结构采用钢管混凝土框架-核心筒-伸臂桁架结构体系,利用损伤塑性本构考虑混凝土的损伤发展,建立了不规则高层结构的三维弹塑性分析模型,分析强震作用下超限高层结构抗震性能及损伤分布,同时分析地震波幅值对不规则高层结构损伤发展的影响。分析得到:罕遇地震作用下核心筒剪力墙整体处于轻微损伤状态,连梁进入塑性而发挥耗能作用;竖向不对称收进的高层结构核心筒损伤较大部位为伸臂桁架楼层及其相邻上部楼层,对该区域损伤较为明显的剪力墙应进行配筋加强;伸臂杆件所在楼层的楼板承担较大的水平剪力作用,处于中度损坏,应进行设计加强;罕遇地震作用下结构损伤发展较设防地震作用时增大,但结构损伤部位和趋势较为一致。由此得出结论,对于竖向不对称收进高层结构应进行强震损伤分析以明确结构抗震薄弱部位。Concrete filled steel tube frame-core wall-outrigger truss structure system is adopted for buildings with asymmetric vertical setbacks.The seismic performance and damage distribution of the structures were analyzed by using elastic-plastic analysis under rare earthquake action.A three-dimensional numerical model was established,the influence of earthquake amplitude on the damage distribution of irregular high-rise structures was studied.The results indicated that the performance state of the core shear wall was slight damage,and earthquake energy could be dissipated by coupling beams entering to the plastic damage state.The outrigger floor and adjacent upper floors of high-rise structures with asymmetric vertical setbacks had severe damage,the shear wall with obvious damage should be reinforced.The floor slabs where the outriggers were located had a moderate damage caused by horizontal shear action,which should be strengthened.Damage development was more obvious under rare earthquake action than that of fortification earthquake action,but the location and trend of structural damage were more consistent.In conclusion,the seismic weak parts of high-rise structures with symmetric vertical setbacks should be analyzed based on the damage analysis under rare earthquake action.

关 键 词：强震作用 抗震性能分析 超限高层结构 竖向不对称收进 弹塑性时程分析 

分 类 号：TU973.17[建筑科学—结构工程] TU317