摘要
为研究不同耗能机制的钢板阻尼连接对装配式钢框架梁柱节点力学性能的影响,本文对两个钢板阻尼连接的装配式边柱减震节点试件进行拟静力试验研究,获得试件的破坏模态、滞回曲线、骨架曲线、滑移曲线和应变发展情况,分析试件的承载力、延性、耗能能力、弯矩–转角等性能指标。研究结果表明:钢板阻尼连接的装配式边柱减震节点具有较好的承载性能和耗能性能,在试验过程中未发现梁、柱主体构件及节点核心区破坏现象,可将损伤集中控制于钢板阻尼连接处。耗能钢板圆形开孔的承压型钢板阻尼连接的装配式边柱减震节点(试件BSDC)主要为耗能钢板发生受拉破坏,长圆形开孔的摩擦型钢板阻尼连接的装配式边柱减震节点(试件FSDC)出现明显的滑移行为,在钢板阻尼连接处产生明显的弯曲残余变形。试件FSDC的承载力略低于试件BSDC,且由于往复荷载下的摩擦系数和预紧力损伤,加载后期试件FSDC承载力出现轻微下降,但其滞回曲线较为饱满,滞回行为稳定,而试件BSDC由于耗能钢板断裂导致承载力急剧下降。试件FSDC的耗能能力和延性均优于试件BSDC,摩擦型钢板阻尼连接耗能占比为88%,承压型钢板阻尼连接为67%,实现了集中耗能,钢板阻尼连接处的滑移行为可改善试件的耗能性能和变形能力。
This study conducts pseudo-static tests on two prefabricated exterior damping joints equipped with steel plate damper connection to investigate the effects of different energy dissipation mechanisms of the steel plate dampers on the mechanical behavior of prefabricated beamcolumn joints in steel frames.It reports the failure modes,hysteresis curves,skeleton curves,slip curves,and strain development.Additionally,it analyzes the bearing capacity,ductility,energy dissipation capacity,and moment-rotation behavior.The results demonstrated that the prefabricated exterior damping joints with steel plate dampers can develop substantial bearing capacity and energy dissipation.The beams,columns,and joint cores remained undamaged,with damage concentrated in the steel plate dampers.The prefabricated exterior damping joints with bearing energy dissipation steel plates with circular openings(BSDC)failed due to the rupture of the steel plate damper,whereas those with friction energy dissipation steel plates with long slotted openings(FSDC)exhibited pronounced sliding behavior and residual bending deformation in the steel plate dampers.The bearing capacity of FSDC was lower and decreased slightly under large displacements due to the loss of friction coefficient and bolt pretension under cyclic loading.However,the hysteresis curve was more plumped and exhibited relatively stable hysteresis behavior.The bearing capacity of BSDC decreased abruptly with the rupture of the steel plate dampers.The energy dissipation capacity and ductility of FSDC were superior to those of BSDC,with 88%of the energy dissipation consumed by friction steel plate dampers,compared to 67%by bearing steel plate dampers.These findings indicated that energy dissipation concentration is achieved,and the sliding behavior of steel plate dampers is beneficial for enhancing both energy dissipation capacity and deformation capacity.
作者
刘如月
吴俭滨
吴应雄
颜桂云
王昊
LIU Ruyue;WU Jianbin;WU Yingxiong;YAN Guiyun;WANG Hao(Fujian Provincial Key Laboratory of Advanced Technology and Information in Civil Engineering,Fujian University of Technology,Fuzhou 350118,China;College of Civil Engineering,Fuzhou University,Fuzhou 350108,China)
出处
《工程科学与技术》
EI
CAS
CSCD
北大核心
2024年第6期113-123,共11页
Advanced Engineering Sciences
基金
国家自然科学基金青年科学基金项目(52208153)
福建省自然科学基金项目(2023J01156)
福州市科技计划项目(2022–P–009)
福建省建设厅项目(2022–K–301)。
关键词
装配式边柱减震节点
钢板阻尼连接
滑移行为
损伤控制
耗能集中
prefabricated exterior damping joint
steel plate dampers
sliding behavior
damage control
energy dissipation concentration.
