多层不均匀偏心框架结构扭转地震反应规律  

Rule of torsional response of the multi-storey asymmetrical eccentric frame structure under earthquake action

作　　者：韩军[1,2] 潘毅[3] 杨伯韬[1] 韩徐扬[3] 

机构地区：[1]重庆大学,重庆400045 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [3]西南交通大学抗震工程技术四川省重点实验室,四川成都610031

出　　处：《土木工程学报》2013年第S1期69-74,共6页China Civil Engineering Journal

基　　金：国家自然科学基金(51108486);中央高校基本科研业务费(CDJZR10200023)

摘　　要：为研究刚度、质量非均匀偏心多层框架结构的扭转地震反应规律,设计均匀和非均匀的质量、刚度偏心框架结构算例各一组,通过计算对比分析其扭转反应规律。结果表明,非均匀质量偏心结构在偏心率相同的情况下顶层偏心时反应最大,底层偏心反应最小;非均匀刚度偏心时规律相反;每层均匀偏心比某一层相同偏心率的偏心结构扭转反应更大;每层刚、质心重合的具有偏置裙房的结构具有明显的扭转反应,相比各层刚心一致而底层具有相应质量偏心率的结构扭转反应大很多。In order to investigate torsional response of multi-storey eccentric structures with non-uniform stiffness and mass distributions along height,two groups of eccentric frame structures with uniform / non-uniform mass and stiffness eccentric are conceived as numerical examples in this paper. The rule of torsional earthquake response of the structures is analysed and contrasted. The results indicate that: if the structures have the same mass-eccentric ratio in some storey,the one with maximal torsional response is the one with eccentricity at the top storey; instead,the one with minimal torsional response is the one with eccentricity at the bottom storey. The above rule is inversed when stiffness-eccentric instead. Moreover,the torsional response of the one with uniform eccentricity at every storey is higher than those with eccentricity at only one storey. The structures without eccentricity at any other storey but with asymmetric eccentric podiums exhibit noticeable torsional response which is far above the one with uniform stiffness center at every storey but with respective mass eccentricity ratio at the corresponding storey.

关 键 词：偏心结构 扭转不规则 地震反应 刚度偏心 质量偏心 

分 类 号：TU352.11[建筑科学—结构工程]