自密实GHPFRCC装配式梁柱节点抗震性能研究  

Study on Seismic Performance of Self-compacting GHPFRCC Prefabricated Beam-column Nodes

作　　者：陈柯臻 李秀领[1,2] 李言 丁经伟 郭强 孙广[5] CHEN Kezhen;LI Xiuling;LI Yan;DING Jingwei;GUO Qiang;SUN Guang(School of Civil Engineering,Shandong Jianzhu University,Jinan,Shandong 250101,China;Key Laboratory of Building Structural Retrofitting and Underground Space Engineering,Ministry of Education,Jinan,Shandong 250101,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China;The Second Construction Co.,Ltd.of China Construction Eighth Engineering Division,Jinan,Shandong 250014,China;China Construction Second Engineering Bureau Co.,Ltd.,Beijing 100160,China)

机构地区：[1]山东建筑大学土木工程学院,山东济南250101 [2]建筑结构加固改造与地下空间工程教育部重点实验室,山东济南250101 [3]天津大学建筑工程学院,天津300350 [4]中建八局第二建设有限公司,山东济南250014 [5]中国建筑第二工程局有限公司,北京100160

出　　处：《施工技术（中英文）》2022年第15期39-45,54,共8页Construction Technology

基　　金：国家自然科学基金面上项目(51278290);山东省自然科学基金(ZR2020ME245);中国地震局工程力学研究所实验室开放课题(2019D10)。

摘　　要：对自密实绿色高性能纤维增强水泥基复合材料(green high-performance fiber-reinforced cementitious composites,GHPFRCC)装配式梁柱节点抗震性能进行拟静力试验研究和数值模拟分析,采用OpenSees软件研究柱轴压比、柱GHPFRCC浇筑长度和柱纵筋配筋率对节点抗震性能的影响,采用ABAQUS软件对节点破坏形态进行分析。研究结果表明,柱轴压比对节点抗剪承载力的影响较小,对延性的影响显著,建议将柱轴压比控制在0.60以下;节点核心区和柱端浇筑GHPFRCC可显著提高节点延性和耗能能力;增加柱纵筋配筋率可提高节点承载力,并有效实现“强柱弱梁”的设计原则,防止柱先于梁破坏;数值模拟得到的节点破坏形态与试验结果基本一致;节点核心区配置附加钢筋时易在后浇区外侧梁上形成薄弱区,应注意采取增强措施。The pseudo static test and numerical simulation analysis were carried out for the seismic performance of self-compacting green high-performance fiber-reinforced cementitious composites(GHPFRCC)prefabricated beam-column nodes,OpenSees software was used to study the influences of column axial compression ratio,column GHPFRCC pouring length and column reinforcement ratio on the seismic performance of nodes.ABAQUS software was used to analyze the failure modes of nodes.The research results show that the column axial compression ratio has a little effect on the shear capacity of the node,while it has a greater impact on the ductility,it is recommended that the column axial compression ratio be controlled below 0.60.The node core area and column end pouring GHPFRCC can significantly improve the ductility and energy consumption capacity of the node.Increasing the column reinforcement ratio can increase the bearing capacity of the node,and the design principle of strong columns and weak beams can be effectively realized to prevent the failure of columns before beams.The damage pattern of the nodes obtained by the simulation is basically the same as that of the tests.When the node core area is equipped with additional reinforcing steel bars,a weak area will be formed on the outer beam of the post-cast area,and reinforcement measures should be taken.

关 键 词：GHPFRCC 装配式 梁柱节点 抗震性能 试验研究 数值模拟 

分 类 号：TU375.4[建筑科学—结构工程]