高层钢-混凝土混合结构拟动力试验研究  

Pseudo dynamic experimental study on highrise steel-concrete hybrid structure

作　　者：陆铁坚[1] 秦素娟[1] 罗应松[1] 余志武[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《建筑结构学报》2009年第3期27-35,共9页Journal of Building Structures

基　　金：国家自然科学基金资助项目(50478092);国家自然科学重点基金资助项目(50438020)

摘　　要：进行了一个15层钢-混凝土混合结构1/10缩尺模型的两自由度单向加载拟动力试验研究,得到了7种不同加载工况下结构的顶层位移时程、楼层最大位移及层间位移角响应,并与有限元理论分析结果进行了比较,两者吻合较好。试验结果表明:在7度地震作用下,结构无明显破坏特征;在8度、9度罕遇地震作用下,连梁开裂,楼板及底层筒体出现裂缝,但钢框架未发生屈服,结构仍具有较大承载力;在地震波峰值加速度达到1.0g、1.6g地震作用下,连梁开裂严重,出现交叉斜裂缝,呈剪切型破坏,筒体底部出现水平通缝,部分底层钢柱屈服,但结构并未完全破坏,仍具有一定的承载能力。因此,只要设计合理,钢-混凝土混合结构具有良好的抗震性能,能实现"小震不坏、中震可修、大震不倒"的设计目标。A pseudo-dynamic test research of uniaxial loading for a 1/10 scale 15-storey steel-concrete hybrid structure was completed. The steel-concrete hybrid structure modal was equivalent as two degree of freedom system, which was executed a pseudo-dynamic testing with 7 cases earthquake acceleration wave. The displacement time history of top floor, the maximal floor displacement and inter-story displacement angle of the model structure were obtained. By comparing with the finite element analysis results, it was found that the test results were in good agreement with the calculation results. The test results indicate that the hybrid structure has no obvious failure characteristics under 7- degree basic intensity and 7-degree of rare earthquake. bottom layer of the core tube under the rare earthquake Cracks appears on the coupling beams, the floor slabs and the of magnitude of 8-degree and 9-degree, but the steel frame is in unyielding status and the structure has good bearing capacity. At the peak acceleration of 1.0 g and 1.6 g of earthquake inputs, cross inclined crack appears on the coupling beams and they are badly cracked in the type of shear failure. Horizontal crack develops across the bottom surface of the core tube and some of the steel columns yield, while the steel-concrete hybrid structure still has some bearing capacity. Therefore, it can be concluded that with reasonable design , the steel-concrete hybrid structure can have good seismic performance under earthquake actions and can satisfy the requirements of ＂three-level performance objectivity＂.

关 键 词：钢-混凝土混合结构 拟动力试验 抗震性能 

分 类 号：TU973.14[建筑科学—结构工程] TU317.1