12.9级高强度螺栓连接外伸端板节点抗震性能数值分析  

Numerical analysis of seismic performance of 12.9 grade high-strength bolt end-plate joints

作　　者：杨俊芬[1,2] 刘盼盼 路朋 何琛 张钦 YANG Junfen;LIU Panpan;LU Peng;HE Chen;ZHANG Qin(School of Civil Engineering,Xi′an Univ.of Arch.&Tech.,Xi′an 710055,China;Collaborative Innovation Center for Assembled Buildings in Western China(XAUAT),Xi′an 710055,China;Meishan CRRC Fastener Technology Co.,Ltd.,Sichuan Meishan 620000,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西部装配式建筑工业化协同创新中心,陕西西安710055 [3]眉山中车紧固件科技有限公司,四川眉山620000

出　　处：《西安建筑科技大学学报（自然科学版）》2023年第1期93-102,共10页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：陕西省教育厅服务地方专项科研计划项目(21JC019);陕西省自然科学基础研究计划面上项目(2022JM-308);中国中车集团有限公司重点项目(2020CKB055)。

摘　　要：对12.9级高强度螺栓连接的外伸端板节点抗震性能开展数值研究.利用ABAQUS验证有限元模型正确的基础上,分析外伸端板节点的螺栓直径、端板厚度及螺栓预紧力对该节点的破坏模式和抗震性能的影响.结果表明:改变螺栓直径系列试件,滞回曲线比较饱满,节点的耗能能力比较好,试件的破坏方式为端板屈曲,梁端形成塑性铰,螺栓破坏;端板厚度系列试件的单向加载曲线初期几乎相同,节点初始转动刚度相同,但是随着端板厚度的增加,节点的承载能力明显提高,端板厚度增大后,节点的破坏形式有转变到梁翼缘的趋势;螺栓预紧力改变,对节点的滞回曲线有一定影响,但对节点的初始转动刚度、屈服荷载、极限荷载和破坏形式等基本无影响.Numerical research is carried out on the seismic performance of overhanging end plate joints connected by the grade-12.9 high-strength bolts.Based on the correctness of the finite element model verified by ABAQUS,the influence of bolt diameter,end plate thickness and bolt pre-tightening force on the node′s failure mode and seismic performance is analyzed.Results show that:the hysteresis curve of the series of specimens changed by the bolt diameter is relatively full,and the node has good energy dissipation capacity.The failure mode of the specimen is end plate buckling,the beam end forms a plastic hinge,and the bolt is damaged;The unidirectional loading curves of the end plate thickness series specimens are almost the same at the initial stage,and the initial rotational stiffness of the joints is the same.However,as the thickness of the end plate increases,the bearing capacity of the joint is significantly improved.After the thickness of the end plate increases,the failure mode of the joint has a tendency to change to the beam flange.The change of bolt preload has a certain influence on the hysteresis curve of the joint,but has basically no influence on the initial rotational stiffness,yield load,ultimate load and failure form of the joint.

关 键 词：12.9级高强度螺栓 外伸端板节点 抗震性能 参数分析 有限元模拟 

分 类 号：TU391[建筑科学—结构工程]