两种型钢拼接预制预应力混凝土节点的抗震性能比较  

Comparison of the Seismic Performance of Precast Prestressed Concrete Joints Formed with Two Types of Structural Steel

作　　者：李韵通 LI Yuntong(Yunnan Tobacco Leaf Co.,Ltd.,Kunming 650218,China)

机构地区：[1]云南省烟草烟叶公司,云南昆明650218

出　　处：《玉溪师范学院学报》2023年第6期66-76,共11页Journal of Yuxi Normal University

摘　　要：为提升预制混凝土结构的延性和耗能能力,解决震后节点无法修复的问题,提出将塑性铰移至预制柱悬臂梁端,采用槽钢和顶底角钢拼接的两种预制预应力混凝土节点.使用ABAQUS有限元模型对两种节点进行模拟分析,并验证模拟分析方法的有效性.给出距离柱边0.12倍梁跨度是节点合理的拼接位置.针对型钢的型号、厚度和螺栓布置位置等因素,对型钢拼接节点的抗震性能进行分析.研究表明:槽钢不是一种理想的拼接方式;相比于槽钢,顶底角钢在保护主体结构、刚度发展良好的前提下,其尺寸、厚度越大,位置越靠近梁的顶、底端,越能达到较高的延性和良好的耗能能力,并能实现钢材的高效利用.预应力的施加可以防止顶底角钢出现剪切破坏,提高节点的承载力和恢复能力.In order to improve the ductility and energy dissipation capacity of the precast concrete structure and solve the problem that the joint cannot be repaired after the earthquake,the precast prestressed concrete joints formed through channel steel splice connection or top&seat angle steel connection were proposed and the plastic hinge was moved to the cantilever beam end of the precast column.An simulation analysis of the two joints was made with ABAQUS and the effectiveness of the method was verified.The reasonable splicing position of the joint is determined at the span of 0.12 times distance from column edge.The seismic performance of the structural steel joints was analyzed according to the type,thickness of the structural steel and layout of the bolts.The results show that channel steel splice connection is not an ideal method;Compared with channel steel,under the premise of protecting the main structure and well developed stiffness,the larger the size and thickness of the top and seat angle steel,the closer the position is to the top and bottom of the beam,the higher the ductility and good energy dissipation capacity can be achieved,and the efficient utilization of steel can be realized.The application of prestress can prevent the shear failure of the top and bottom angle steel,and improve the bearing capacity and recovery ability of the joint.

关 键 词：预制预应力混凝土节点 塑性铰 型钢拼接 有限元 

分 类 号：TU756.4[建筑科学—建筑技术科学]