高耸型钢钢筋混凝土筒体结构抗震性能振动台试验研究  

Shaking table test on seismic performance of towering steel-reinforced concrete tube structure

作　　者：区彤[1] 刘彦辉[2] 谭平[2] 刘雪兵[1] 周福霖[2] OU Tong;LIU Yanhui;TAN Ping;LIU Xuebing;ZHOU Fulin(Architectural Design and Research Institute of Guangdong Province,Guangzhou 510010,China;Earthquake Engineering Research and Test Center,Guangzhou University,Guangzhou 510405,China)

机构地区：[1]广东省建筑设计研究院,广东广州510010 [2]广州大学工程抗震研究中心,广东广州510405

出　　处：《建筑结构学报》2022年第4期36-46,共11页Journal of Building Structures

基　　金：国家自然科学基金项目(51778163),国家重点研发计划重点专项(2017YFC0703601)。

摘　　要：为了研究高耸型钢钢筋混凝土结构抗震性能,以实际高宽比13.33的高耸型钢钢筋混凝土筒体结构为试验研究对象,提出了考虑重力完全相似模型设计方法及实现策略,设计并制作了1∶20的试验模型,对其进行自由衰减试验及不同地震波激励下的振动台试验,获得了高耸型钢钢筋混凝土外筒体结构的阻尼比,研究了不同幅值不同地震波激励下其加速度响应、位移响应、应变响应和层间剪力的分布规律。试验结果表明:基于考虑重力完全相似设计方法和实现策略设计制作的缩尺试验模型能很好地反映实际结构的特性,自振特性有限元分析结果与试验结果基本一致;高耸型钢钢筋混凝土筒体结构振动时内部耗能较小,第一阶自振周期阻尼比1.123%,小于规范规定值;在设防地震和罕遇地震时结构发生损伤,加速度、层间位移和层间剪力的分布发生较大变化,加速度响应最大值总体从结构上部到下部逐渐增加;层间位移在结构的中部及上部变得不均匀,呈“波浪”形;层间剪力从结构上部到下部基本呈线性增加;高耸型钢钢筋混凝土筒体结构具有良好的抗震性能,型钢与混凝土能协同工作,应变相差较小,钢筋混凝土墙主要受整体倾覆弯矩影响,抗震性能满足规范要求。In order to study the seismic performace of towering steel-reinforced concrete tube structure,taking a model with actual aspect ratio of 13.33 as the experimental research object,the design method and implementation strategy of experimental model considering full similarity of gravity were proposed.One 1∶20 test model was designed and manufactured,and its free attenuation test and shaking table test were carried out under different seismic wave excitations to obtain the damping ratio of the towering steel-reinforced concrete tube structure and to study the distribution laws of acceleration response,displacement response,strain response and inter-story shear force under different seismic wave excitations.The test results show that the scale test model based on gravity full similarity design method and implementation strategy can reflect the performance of the prototype structure well,and the experimental results of natural vibration characteristics are basically consistent with the finite element analysis results.The interal energy-dissipation performance of towering steel-reinforced concrete tube structure is low,and the first-period damping ratio is 1.123%,which is less than the value specified in the code.When the structure is damaged during fortification earthquake and rare earthquake,the distribution of acceleration,inter-story displacement and inter-story shear force will change greatly,and the maximum value of acceleration response increases gradually from top to bottom of the structure.The distribution of inter-story displacement becomes uneven in the middle and upper part of the structure,presenting‘wave’shape.The inter-story shear force increases linearly from top to bottom of the structure.The towering steel-reinforced concrete tube structure presents favorable seismic performance.The steel can work together with concrete,and the difference between the strain of steel and concrete is small.The steel-reinforced concrete wall is mainly affected by the overall overturning moment.Its seismic performan

关 键 词：高耸结构 型钢钢筋混凝土筒体结构 振动台试验 抗震性能 阻尼比 

分 类 号：TU398.9[建筑科学—结构工程]