偏心钢筋混凝土框-剪结构模型的振动台试验  

Research on Shaking Table Tests for Reinforced Concrete Eccentricity Frame-Wall Model

作　　者：李兵[1] 李宏男[2] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]大连理工大学土木水利学院,辽宁大连116023

出　　处：《沈阳建筑大学学报（自然科学版）》2009年第5期829-833,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家杰出青年基金项目(50025823)

摘　　要：目的研究钢筋混凝土偏心框架-剪力墙结构在地震作用下受力性能.方法采用EL Centro波逐级加载方式对钢筋混凝土偏心框架-剪力墙结构模型进行振动台试验,对结构的破坏形态、破坏程度,以及试验现象进行分析.结果当地震波最大加速度峰值为4 m.s-2时,结构内部产生微裂缝.当地震波最大加速度峰值超过6 m.s-2时,结构破坏顺序为框架梁开裂,柱根部产生裂缝,塑性铰形成.结论随着裂缝和塑性变形的发展,结构的各阶频率随之下降,以第一频率下降的速度最快,阻尼也相应的增加.结构抗侧力构件的不对称,将使得结构在地震荷载作用下产生扭转,使得边缘构件负担加重,尤其是角柱更是结构的薄弱环节,在设计中应该充分重视.In order to research the performance of the RC eccentricity frame-wall structures, shaking table tests of three-story reinforced concrete frame-wall model were carried out by inputting different degrees of El-centre wave and the test analysis was introduced in this paper. Wispy crack appeared when the maximal acceleration reached 4 m·s -2, and when the maximal acceleration reached 6 m. s -2, destructive sequences were beam split, column split and plastic forming. Through the test, we can obtain the conclusions as the following：with the development of crack and plastic distortion, the frequency of every model is decreased and the speed of decline for first frequency is the fastest. At the same time, damping of every model is increased. The dissymmetry of the structural members for resisting the lateral load will make the structure rotate. The rotation will increase the burden of members on the edge of structures. As a result,the comer column which is the weakest part should be attached importance to in the design.

关 键 词：钢筋混凝土 框架-剪力墙结构 振动台试验 抗震性能 

分 类 号：TU375.3[建筑科学—结构工程]