基于最佳侧移刚度分布的钢框架结构抗震设计方法  

Seismic Design Method for Steel Structure Based on Optimum Lateral Stiffness Distribution

作　　者：李正川 王星星[2] 李航 王维[2] 罗海嘉 李爱群[4,5] Li Zheng-chuan;Wang Xing-xing;Li Hang;Wang Wei;Luo Hai-jin;Li Ai-qun(China Railway Eryuan Engineering Group Co.Ltd.,Chongqing 400023,China;Jiangsu University of Science and Technology,School of Civil Engineering and Architecture,Zhenjiang 212000,China;Chongqing City Transportation Development &Investment Group Co.Ltd,Chongqing 401121,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;School of Civil Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]中铁二院重庆勘察设计研究院有限责任公司,重庆400023 [2]江苏科技大学土木工程与建筑学院,江苏镇江212000 [3]重庆城市综合交通枢纽开发投资有限公司,重庆401121 [4]北京建筑大学未来城市设计高精尖创新中心,北京100044 [5]东南大学土木工程学院,江苏南京210096

出　　处：《工程抗震与加固改造》2018年第6期101-106,118,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金(51438002;51708257;51708258);重庆市应用开发计划重点项目(cstc2014yykfB30003)

摘　　要：以罕遇地震作用下建筑各楼层累积塑性变形倍率相等为目标,基于钢框架结构的最佳侧移刚度分布和最佳截面惯性矩分布,提出多层钢框架结构的抗震设计方法,给出其设计步骤。以7层框架结构为例介绍该设计方法,在此基础上,利用弹塑性时程分析方法和能量法对结构进行抗震性能分析,考察本文提出抗震设计方法的可靠性。研究结果表明,符合最佳侧移刚度分布的多层钢结构在罕遇地震作用下的各楼层累计塑性变形倍率和能量分布较为均匀,具有较传统钢框架结构更优的抗震性能。In order to make the cumulative plastic deformation ratio of each storey equivalent under rare earthquakes, based on the optimum lateral stiffness distribution and optimum moment of inertia distribution of steel structures, a novel seismic design method is proposed, and the design procedure is presented. A 7-storey steel structure is taken as an example of the design procedure. Time history analysis method and energy method are used to study the seismic performance of the designed steel structure, and the reliability of the design method is verified. The results show that the cumulative plastic deformation ratios and energy distribution of the structures designed with the novel design method are uniform, the seismic performance of which is better than that of common steel structure.

关 键 词：抗震设计 钢框架结构 最佳侧移刚度比 累积塑性变形倍率 

分 类 号：TU311.3[建筑科学—结构工程]