带腋撑RC框架结构水平脉冲地震弹塑性动力分析  

Seismic Elastic-Plastic Analysis of RC Frame Structure with Diagonal Member Subjected to Pulse-like Horizontal Ground Motions

作　　者：周靖[1] 周飞[2,3] 蔡健[2,4] 王里佳 

机构地区：[1]湘潭大学土木系,湘潭411105 [2]华南理工大学土木与交通学院,广州510640 [3]广东省高教建筑规划设计院,广州510631 [4]华南理工大学亚热带建筑科学国家重点实验室,广州510640

出　　处：《武汉理工大学学报》2010年第7期111-116,共6页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50878087);湘潭大学科研基金(07QDZ08)

摘　　要：研究大跨度钢筋混凝土带腋撑框架(RCFD)结构在脉冲型水平地震作用下的弹塑性动力反应特性。采用3组25条集集地震动记录,通过实际工程结构简化的二维平面大跨度RCFD结构的弹塑性动力时程分析,比较了脉冲型和非脉冲型地震作用下结构层间位移和基底剪力反应的差别,分析了地震动脉冲指数和结构体系参数对结构地震水平位移反应的影响。分析结果表明:地震动脉冲指数对RCFD结构位移反应的影响更显著,层间位移能力需求更高;地震动脉冲特性越强,RCFD结构位移反应越大,体系参数对结构脉冲型地震动反应有重要影响。Elasto-plastic dynamic response of long-span reinforced concrete frame structures with diagonal member（RCFD） are studied under pulse-like ground motions.25 ground motion records of Chichi earthquake are selected and divided into three groups.Long-span plane RCFD structure simplified from the practical engineering project is employed to execute elastic-plastic dynamic time-history analysis.Seismic interstory drift and base shear force of structures are compared under the pulse-like and non-pulse ground motions,and the effects of pulse indicator of ground motion and structural system parameter on seismic displacement response are analyzed.The study show that the effect of pulse-like ground motions on seismic displacement response of RCFD structure is more significant;structural displacement response is distinctly higher under strong pulse-like ground motions;the structural system parameters have an obvious influence on pulse-like seismic response.

关 键 词：脉冲型地震 框架结构 腋撑 弹塑性 动力时程分析 

分 类 号：TU375.4[建筑科学—结构工程]