摘要
为研究设置灌浆层端板螺栓连接装配式混合框架(PRCS)节点的抗震性能,通过4个足尺试件的低周反复荷载试验和精细化ABAQUS模型有限元分析,研究不同灌浆层厚度、端板厚度、钢梁高跨比等因素对PRCS节点的承载力、刚度、延性、耗能能力和螺栓受力的影响,分析低周反复荷载作用下节点受力机理。结果表明:设置灌浆层对节点承载力与初始刚度提高有限,增幅在5%以内,灌浆层厚度增加会对螺栓受力产生不利影响,建议灌浆层厚度不大于20 mm;不同端板厚度节点的刚度退化规律一致,破坏时节点刚度约为初始刚度的15%,端板厚度增加会使节点由混合破坏机制向梁铰破坏机制转变;随钢梁高跨比提高,节点连接界面呈现剪切破坏趋势。
To study the seismic performance of prefabricated composite frame(PRCS)joints with grouted end plate bolted connections,cyclic loading tests of four full-scale specimens and a refined ABAQUS model were conducted and established to study the influences of different grouting layer thicknesses,end plate thicknesses,and steel beam height-to-span ratios on the bearing capacity,stiffness,ductility,energy dissipation,and bolt stress of PRCS joints,and the performance of joints under cyclic loading was analyzed.The results show that the addition of grouting layer to the specimen leads to a limited increase on joint bearing capacity and initial stiffness,within a range of 5%.As the thickness of the grout layer increases,it will affect the bolt force,so it is recommended that the thickness of the grout layer should not be greater than 20 mm.The stiffness degradation law of specimens with different end plate thicknesses is consistent.At the point of failure,the stiffness of the specimens is approximately 15%of the initial stiffness,and as the end plate thickness increases,the failure mechanism of specimen changes from a mixed failure mechanism to a beam-hinge failure mechanism.With the increase of the height-to-span ratio of the steel beam,the joint connection interface presents a shear failure trend.
作者
张锡治
马相
章少华
李青正
ZHANG Xizhi;MA Xiang;ZHANG Shaohua;LI Qingzheng(Tianjin University Research Institute of Architectural Design and Urban Planning,Tianjin 300072,China;School of Civil Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Coast Civil Structure&Ministry of Safety Education(Tianjin University),Tianjin 300072,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2023年第S01期101-111,共11页
Journal of Building Structures
基金
国家自然科学基金项目(52278203)
天津市科技计划重点项目(19YDLYSN00120)
关键词
装配式混合框架梁柱节点
灌浆层
端板螺栓连接
低周反复荷载
有限元分析
抗震性能
prefabricated hybrid frame beam-column joint
grouting layer
end plate bolted connection
cyclic loading
finite element analysis
seismic performance
