高耸塔台结构抗震性能及推覆模式影响分析  

Seismic performance and pushover model influence analysis of high-rising tower structure

作　　者：黄信 李毅 齐麟 陈宇[1,2] Huang Xin;Li Yi;Qi Lin;Chen Yu(Base of Airport Engineering,Civil Aviation University of China,Tianjin 300300,China;School of Transportation Science and Engineering,Civil Aviation Universily of China,Tianjin 300300,China)

机构地区：[1]中国民航大学机场工程科研基地,天津300300 [2]中国民航大学交通科学与工程学院,天津300300

出　　处：《工程抗震与加固改造》2022年第2期26-32,47,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：天津市教委科研计划项目(2019KJ123);中央高校基本科研业务费项目(3122018C014);中国民航机场工程科研基地开放基金项目(JCGC2019KFJJ004)。

摘　　要：为明确机场高耸塔台结构抗震性能,保障高耸塔台抗震安全,有必要研究高耸塔台结构强震损伤分布以及推覆模式影响。利用反应谱和弹性时程分析方法分析了多遇地震下塔台结构的抗震性能,采用推覆分析方法研究了罕遇地震作用下高耸塔台结构的塑性发展,并分析了推覆侧向力模式及地震烈度对高耸塔台地震响应的影响。通过分析可知,多遇地震作用下塔台结构最大层间位移角满足规范限值要求;罕遇地震作用下,塔台上部悬挑层斜柱未进入塑性,而筒体剪力墙在底部和中部均出现明显刚度退化,在抗震设计时应予以加强;在塔台底部采用倒三角模式进行推覆得到的结构刚度退化最明显,在塔台中部采用4种推覆模式获得的结构刚度非常接近,在塔台上部采用实时模式进行推覆得到的结果与弹塑性时程分析结果较为接近,建议在塔台底部区域采用倒三角模式进行推覆、在塔台中部及顶部采用实时模式进行推覆。To further clarify the seismic performance of high-rising tower structure and ensure the seismic safety of high-rising tower, it is necessary to study the damage performance and the influence of pushover mode of high-rising tower structure. The seismic performance of tower structure under frequent earthquakes is analyzed by response spectrum and elastic time-history analysis method. The seismic performance and plastic development of high-rising tower structure under rare earthquake are studied by pushover analysis, and the influence of pushover lateral force mode and seismic intensity on seismic response of high-rising tower is analyzed. It can be seen that the maximum inter story drift angles of the tower structure meet the limit requirements under the frequent earthquake action. Under rare earthquake action, the inclined column supporting of the cantilevered layer of the tower structure does not enter the plastic state, but the obvious rigidity degeneration has happened at the bottom and middle of the shear walls of the tube, which should be strengthened in the seismic design. The most obvious structural stiffness degradation is obtained by using the inverted triangle model at the bottom of the tower, the structural stiffness obtained by using four pushover modes is very close at the middle of the tower, and the results of real-time model are close to elastic-plastic time history analysis at the top of the tower. Therefore, it is suggested to adopt the inverted triangle model at the bottom area of the tower and the real-time model at the middle and top of the tower for pushover analysis.

关 键 词：高耸塔台结构 抗震性能分析 罕遇地震作用 结构塑性铰分布 推覆模式分析 

分 类 号：TU318[建筑科学—结构工程]