带裂缝胶合木梁柱螺栓-钢填板加固节点的抗弯性能研究  

Research on bending performance of reinforced cracked bolted glulam beam⁃to⁃column connections

作　　者：叶灵鹏 郑晓清 林巍[1,2] 朱浩川 YE Lingpeng;ZHENG Xiaoqing;LIN Wei;ZHU Haochuan(The Architectural Design&Research Institute of Zhejiang University Co.,Ltd,Hangzhou 310028,China;Center for Balance Architecture,Zhejiang University,Hangzhou 310028,China)

机构地区：[1]浙江大学建筑设计研究院有限公司,杭州310028 [2]浙江大学平衡建筑研究中心,杭州310028

出　　处：《建筑结构》2023年第20期135-141,共7页Building Structure

基　　金：浙江大学平衡建筑研究中心基金项目(KYY⁃669000⁃0034)。

摘　　要：对于带裂缝胶合木梁柱螺栓-钢填板连接节点,提出了运用钢箍、碳纤维布和自攻螺钉三种加固方案。在考虑裂缝影响的基础上,利用ABAQUS有限元软件对加固节点进行精细化模拟,分析加固节点的应力分布与变形情况,研究加固节点的抗弯性能,并与完好节点、未加固带裂缝节点进行对比。结果表明,加固节点的承载力和刚度可有效恢复,不同加固节点的抗弯承载力可恢复至完好节点的954%-1018%,初始刚度可恢复至完好节点的979%-1026%,其中抗弯承载力相比于未加固节点提高约644%-756%。另外,钢箍、碳纤维布和自攻螺钉均可有效地限制既有裂缝发展,提高加固节点的延性,恢复节点的耗能能力。Three reinforcement schemes of steel hoop,carbon fiber and self-tapping screws were proposed for the cracked bolted glulam beam-to-column connections.On the basis of considering the influence of crack,ABAQUS finite element software was used to conduct fine simulation of the reinforced connections.The stress distribution and deformation of the reinforced connections were analyzed,and the bending performance of the reinforced connections was studied.The comparisons with the intact connections and the unreinforced connections with cracks were also conducted.The results show that the bearing capacity and stiffness of the reinforced connections can be effectively restored.The bending capacity of different reinforced connections can be restored to 954%-1018%of that of intact connections,and the initial stiffness can be restored to 979%-1026%of that of intact connections.The bending capacity of the reinforced connections is increased by 644%-756%compared with that of unreinforced connections.In addition,steel hoop,carbon fiber and self-tapping screws can effectively limit the development of existing cracks,improve the ductility of reinforced connections and restore the energy dissipation capacity of the connections.

关 键 词：胶合木梁柱螺栓-钢填板节点 裂缝 加固 承载力 刚度 

分 类 号：TU366.2[建筑科学—结构工程]