环形钢筋闭合连接性能研究综述  

Review on properties of closed connection of loop rebar

作　　者：武盛韬 初明进[1] 刘继良 WU Shengtao;CHU Mingjin;LIU Jiliang(Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Shandong Aikefu Building Technology Co.,Ltd.,Yantai 264006,China;School of Civil Engineering,Dalian University of Technology,Dalian 116000,China)

机构地区：[1]北京建筑大学北京未来城市高精尖研究中心,北京100044 [2]山东艾科福建筑科技有限公司,烟台264006 [3]大连理工大学土木工程学院,大连116000

出　　处：《建筑结构》2023年第23期108-115,139,共9页Building Structure

基　　金：国家自然科学基金项目(51778034);北京市属高校基本科研业务费专项资金资助(X19003)。

摘　　要：环形钢筋闭合连接的连接方式可以减小连接区域宽度,具有较大的应用价值;阐述了环形钢筋闭合连接的传力机制,以及国内外对环形钢筋闭合连接和采用环形钢筋闭合连接节点的装配式剪力墙抗震性能的研究进展。环形钢筋闭合连接中核心混凝土区域发挥了重要的作用,其主要破坏形式是斜截面剪切破坏,通过改变核心混凝土横截面面积、设置纵筋改变核心混凝土破坏模式和提高材料性能等方式,可以提高核心混凝土抗剪能力,提升节点的连接性能;采用环形钢筋闭合连接节点的装配式剪力墙破坏模式与现浇墙相似,表现出了良好的抗震性能,能够满足“等同现浇”的要求,可以应用于实际工程,但改变环形钢筋间距对连接性能的影响尚无统一定论,还需要进一步深入研究。总结了不同学者针对环形钢筋闭合连接提出的承载力模型,并进行了验证与分析,结果表明Joergensen提出的公式与试验数据吻合较好;国外规范的相关规定中,欧洲规范与FIB指南考虑因素较为全面,可以作为工程实践的参考。The closed connection of loop rebar can reduce the width of the connection area,which has great application value.The force transfer mechanism of closed connection of loop rebar and the research progress on the seismic performance of closed connection of loop rebar and fabricated shear wall with closed connection of loop rebar joints at home and abroad were described.The core concrete area plays an important role in the closed connection of loop rebar,and its main failure form is oblique section shear failure.By changing the cross-sectional area of core concrete,setting longitudinal reinforcement to change the failure mode of core concrete and improving material properties,the shear resistance of core concrete can be improved and the connection performance of joints can be improved.The failure mode of fabricated shear wall with closed connection joints of loop rebar is similar to cast-in-place shear wall,which shows good seismic performance,can satisfy the requirements of“equivalent to cast-in-place”,and can be applied to practical projects.However,the influence of changing the spacing of loop rebar on the connection performance has not been determined,and further research is needed.The bearing capacity models proposed by different scholars for closed connection of loop rebar were summarized,verified and analyzed.The results show the formula proposed by Joergensen is in good agreement with the test data;among the relevant provisions of foreign codes,European codes and FIB guide consider more comprehensive factors,which can be used as a reference for engineering practice.

关 键 词：环形钢筋 闭合连接 剪力墙 核心混凝土 受力性能 

分 类 号：TU973.16[建筑科学—结构工程]