摘要
目的研究装配式混凝土钢筋套筒灌浆连接柱在轴心压力下的力学性能。方法对2根装配式混凝土柱(1根套筒灌浆连接节点形式试验柱,1根套筒灌浆+对拉钢板的连接节点形式试验柱)进行轴心受压试验,通过静载试验获得各试件受压极限承载力、材料的应力变化等试验数据;在试验基础上,对装配式混凝土柱的节点进行改进,通过ABAQUS有限元软件对改进后的17根装配式混凝土柱的极限承载力进行分析。结果有限元结果表明:两种连接节点模拟柱随钢筋直径的增大,极限承载力增大且增幅相似;随混凝土强度等级的增加,对拉钢板连接节点模拟柱的承载力增幅比套筒灌浆连接节点模拟柱小;增大螺栓预紧力能够增加钢板对内部混凝土的约束,明显提高对拉钢板模拟柱的极限承载力。结论两种连接节点形式的装配式混凝土柱均具有良好的力学性能,能够满足承载力的需求。
In order to study the mechanical properties of prefabricated concrete reinforced sleeve grouting connection columns under axial pressure, axial compression test was carried out on 2 prefabricated concrete columns(1 test column in the form of sleeve grouting connection node, and 1 test column in the form of sleeve grouting+connection node of the tension steel plate),test data such as the ultimate compressive bearing capacity of each specimen and the stress change of materials are obtained through static load test.On the basis of experiments, the joints of prefabricated concrete columns are improved, the ultimate bearing capacity of the improved 17 prefabricated concrete columns was analyzed by ABAQUS finite element software.The finite element results show: With the increase of the diameter of the reinforcement, the ultimate bearing capacity of the simulated columns of the two connection nodes increases and the increase is similar;With the increase of the concrete strength grade, the increase in the bearing capacity of the simulated column of the tensioned steel plate connection node is smaller than that of the sleeve grouting connection node;Increasing the pre-tightening force of the bolt can increase the restraint of the steel plate on the internal concrete, and significantly improve the ultimate bearing capacity of the tensile steel plate simulation column;The prefabricated concrete columns with two types of connection nodes have good mechanical properties and can meet the requirements of bearing capacity.
作者
程东辉
高佩罡
任曼妮
CHENG Donghui;GAO Peigang;REN Manni(School of Civil Engineering,Northeast Forestry University,Harbin,China,150040)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第4期602-609,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金重大研究计划项目(90915003)
中央高校基本科研业务费创新团队与重大项目培育资金项目(2572016EBC1)。
