增设节点阻尼器的外附钢框架结构抗震性能试验研究  

Experimental study on seismic behavior of external steel frame structure with joint damper

作　　者：沈金生 贾少卓[2] 刘利伟 聂千朋 彭宁宁 SHEN Jinsheng;JIA Shaozhuo;LIU Liwei;NIE Qianpeng;PENG Ningning(Tianjin University,Tianjin 300073,China;Hebei University of Engineering,Handan 056000,China)

机构地区：[1]天津大学,天津300073 [2]河北工程大学,河北邯郸056000

出　　处：《世界地震工程》2021年第2期107-114,共8页World Earthquake Engineering

基　　金：国家自然科学基金(51378169);河北省自然科学基金项目(E2019402183)。

摘　　要：提出一种组合型减震结构,由钢框架、节点阻尼器和原结构连接组成,外附钢框架将节点阻尼器连接在原混凝土框架结构上形成的增设节点阻尼器的外附钢框架结构,节点阻尼器的剪切滞回变形可以减小结构自身需要消耗的能量,从而提高原结构抗震性能。对原混凝土结构和增设节点阻尼器的组合型结构进行了的振动台试验。通过分析结构在不同地震波激励下的加速度和位移响应,得出楼层加速度和层位移的减震效果。研究结果表明:该结构体系在小震作用下通过提高结构刚度来增强其抗震性能;在大震作用下则可借助节点阻尼器的变形耗能来提升结构耗能能力,结构加速度减震系数达到53%,层间位移减震系数高达72%,验证了增设节点阻尼器的外附钢框架结构的减震效果。A composite seismic structure is proposed,which is constructed of steel frame,joint damper and original structure connection.The steel frame with external joint damper connects the joint damper to the original concrete frame structure.The hysteretic shear deformation of the joint damper can reduce the energy dissipated by the structure itself and improve the seismic performance of the original structure.Shaking table tests are carried out on the original concrete structure and the composite structure with joint dampers.By analyzing the acceleration and displacement responses of the structure under different seismic excitation,the damping effect on the floor acceleration and displacement is obtained.The results show that:the seismic performance of the structure system can be enhanced by increasing the stiffness of the structure under frequent earthquakes,and the energy dissipation capacity of the structure can be improved by using the joint damper under major earthquakes.The acceleration damping coefficient of the structure is 53%,and the inter story displacement damping coefficient is as high as 72%.

关 键 词：节点阻尼器 外附钢框架结构 试验研究 耗能减震 混凝土结构 

分 类 号：TU375.4[建筑科学—结构工程]