周边加强框架的抗震设计  

Seismic design of perimeter strengthened frame

作　　者：易伟建[1,2] 李文静 YI Weijian;LI Wenjing(Hunan Provincial Key Lab on Diagnosis for Engineering Structures,Hunan University,Changsha 410012,China;Civil Engineering College,Hunan University,Changsha 410012,China)

机构地区：[1]湖南大学工程结构损伤诊断湖南省重点实验室,长沙410012 [2]湖南大学土木工程学院,长沙410012

出　　处：《建筑结构》2021年第20期20-27,共8页Building Structure

基　　金：国家自然科学基金资助(51878260)。

摘　　要：周边加强框架是由抵抗全部地震作用的周边框架和仅承担重力荷载的承重框架组成,通过调整柱的截面尺寸来加强框架的抗震性能。基于周边加强框架的设计概念,总结了国内外周边加强框架的研究现状。模拟了多层钢筋混凝土框架结构的抗震试验,验证了采用SAP2000软件建模分析的正确性。按中国规范设计普通框架结构,然后以此为基础设计周边加强框架,分别建立了普通框架和周边加强框架模型,采用时程分析法对比研究了两框架在双向地震作用下的抗震性能。结果表明:周边加强框架的抗震性能可以满足中国规范的抗震要求。周边加强框架的层间位移角在多遇地震和罕遇地震作用下分别比普通框架的小4%和6%,周边加强框架的抗震性能优于普通框架的抗震性能。经计算,周边加强框架可以一定程度地节省结构的工程造价。The perimeter strengthened frame is composed of the perimeter frame resisting all seismic actions and the gravity-only frame bearing only gravity load. The seismic performance of frame is strengthened by adjusting the section size of the column. Based on the design concept of perimeter strengthened frame, the current research status of perimeter strengthened frame at home and abroad was summarized. The seismic test of multi-layer reinforced concrete frame structure was simulated to verify the correctness of SAP2000 software modeling analysis. According to the Chinese standards, the common frame structure was designed, and then the perimeter strengthened frame was designed on this basis. The models of the common frame and the perimeter strengthened frame were established respectively. The time history analysis method was used to compare the seismic performance of the two frames under the two-way earthquake action. The results show that the seismic performance of the perimeter strengthened frame can meet the seismic requirements of Chinese standards. The story displacement angle of the perimeter strengthened frame is 4% and 6% smaller than that of the common frame under the action of frequent earthquake and rare earthquake, respectively. The seismic performance of the perimeter strengthened frame is better than that of the common frame. After calculation, the perimeter strengthened frame can save the engineering cost of the structure to a certain extent.

关 键 词：钢筋混凝土框架结构 抗震设计思路 周边加强框架 时程分析 

分 类 号：TU375[建筑科学—结构工程]