采用端板螺栓连接的可更换耗能梁抗震及可更换性能试验研究  

EXPERIMENTAL STUDY ON SEISMIC AND REPLACEABLE PERFORMANCE OF REPLACEABLE ENERGY DISSIPATION BEAMS WITH BOLTED END PLATES

作　　者：门进杰[1,2] 张智勇 熊礼全 王家琛 范栋鑫 MEN Jin-jie;ZHANG Zhi-yong;XIONG Li-quan;WANG Jia-chen;FAN Dong-xin(State Key Laboratory of Green Building in Western China,Xi’an University of Architecture&Technology,Xi’an,Shaanxi 710055,China;School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an,Shaanxi 710055,China;School of Civil Engineering,Chongqing Three Gorges College,Chongqing 404120,China)

机构地区：[1]西部绿色建筑国家重点实验室/西安建筑科技大学,陕西西安710055 [2]西安建筑科技大学土木工程学院,陕西西安710055 [3]重庆三峡学院土木工程学院,重庆404120

出　　处：《工程力学》2023年第9期130-141,共12页Engineering Mechanics

基　　金：西部绿色建筑国家重点实验室自主研究课题基金项目(LSZZ202115);国家重点研发计划国际合作重点专项项目(2019YFE0112900);国家自然科学基金项目(52178160,51878542)。

摘　　要：为研究端板-螺栓连接可更换耗能梁的抗震及可更换性能,设计制作了4个可更换耗能梁试件并进行了拟静力试验,研究不同长度系数对可更换耗能梁抗震性能和可更换能力的影响。结果表明:当长度系数较小时,试件发生剪切破坏,破坏特征包括腹板-加劲肋焊缝撕裂、腹板屈曲和腹板撕裂;当长度系数较大时,试件发生弯剪破坏,破坏特征包括梁端翼缘-端板焊缝撕裂和梁端翼缘屈曲;所有试件的滞回曲线非常饱满,具有优异的变形能力和耗能能力;可更换耗能梁的抗剪承载力强化明显,超强系数均值为1.9;采用端板-螺栓连接的可更换耗能梁均可实现震后可更换,当梁端残余转角为0.0020 rad~0.0046 rad时耗能梁可以实现震后更换,且更换快捷、操作简单;同时,根据耗能梁构件与带可更换构件的RCS混合框架结构体系的几何变形特征,可以将耗能梁的主要受力阶段划分为正常使用、非必要更换和必要更换3个阶段。To study the seismic performance and replaceable capacity of energy dissipation beams with bolted end plates,four replaceable energy dissipation beam specimens were designed and fabricated.The effects of length ratio on seismic performance and replaceable capacity of the replaceable energy dissipation beams were investigated through quasi-static test.The results show that specimens with small length ratio present a shear dominated behavior including web-to-stiffener weld fracture,web buckling and web tear.Whereas the failure features of shear and flexure dominate the behavior of specimens with large length ratio,manifested as flange buckling and end plate-to-flange weld fracture.All tested specimens exhibit stable hysteresis behavior,excellent deformation ability and energy dissipation capacity.In addition,the bearing capacity of replaceable energy dissipation beams is strengthened significantly,and the average value of the overstrength factor is about 1.9.The replaceable energy dissipation beams with bolted end plates can be replaced after the earthquake.Moreover,the energy dissipation beams can be replaced conveniently after the earthquake when the residual angle at the beam end is 0.0020 rad-0.0046 rad.Meanwhile,the main stress development of replaceable beams can be divided into three stages of serviceability,non-essential and mandatory replaceability according to the deformation relationship between the replaceable link beams and the proposed frame structure system.

关 键 词：RCS混合框架结构 可更换耗能梁 拟静力试验 可拆卸连接构造 可更换性能 

分 类 号：TU352.11[建筑科学—结构工程] TU398.9