灌浆插筋式模块钢结构连接节点力学性能试验研究  

Experimental Research on Mechanical Properties of Grout-Reinforced Connections in Modular Steel Structures

作　　者：陈志华[1] 孟凡贵 刘红波 尚静媛 崔萌 闫翔宇[1] Chen Zhihua;Meng Fangui;Liu Hongbo;Shang Jingyuan;Cui Meng;Yan Xiangyu(School of Civil Engineering,Tianjin University,Tianjin 300072,China;School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;Tianjin Jinbeier Architecture Engineering Test and Inspection Technology Co.,Ltd.,Tianjin 300130,China;Tianjin Construction Technology Co.,Ltd.,Tianjin 300403,China)

机构地区：[1]天津大学建筑工程学院,天津300072 [2]河北工程大学土木工程学院,邯郸056038 [3]天津津贝尔建筑工程试验检测技术有限公司,天津300130 [4]天津建工科技有限公司,天津300403

出　　处：《天津大学学报（自然科学与工程技术版）》2024年第3期311-320,共10页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金资助项目(51978457).

摘　　要：针对模块钢结构建筑间的连接问题,提出了一种新型的由钢筋与CGM灌浆料组成的灌浆插筋式模块钢结构连接节点形式,并采用试验和理论分析的方法,对节点柱的轴压性能、轴拉性能和抗弯性能进行了深入研究,提出了相应的承载力计算方法.研究结果表明:①在轴向压力作用下,此节点上下两侧空钢管发生屈曲破坏,轴压承载力约为钢管截面屈服承载力的97%,表明此节点具有较好的抗压承载能力;不同钢筋直径试件的荷载-位移曲线基本一致,表明节点的抗压承载力与钢筋直径无关;②在轴向拉力作用下,试件在节点的连接缝隙处发生分离,灌浆料表面呈现了斜向裂缝;在钢筋直径为14~18 mm的范围内,构件的极限抗拉承载力为钢管极限承载力的28%~32%,并且随着钢筋直径的增大,试件的极限抗拉承载力增大、延性减小;③在弯矩作用下,试件一侧受拉、另一侧受压,在节点的连接缝隙处钢管发生分离,受拉区灌浆料形成斜向裂缝;在钢筋直径为14~18 mm的范围内,构件的抗弯承载力为钢管承载力的37%~47%,并且随着钢筋直径的增大,试件的极限抗拉承载力增大、延性减小,试件的屈服位移和极限位移均增大.A wet-jointed connection with steel bars and cement-based grouting material(CGM)was proposed to address the problem of connecting modules in modular steel structures.The axial compression properties,axial tension properties,and flexural properties of the connection were investigated through mechanical testing and theoretical analysis,and the corresponding bearing capacity calculation method was proposed.The results revealed that:①The hollow steel tubes on both sides of the connection buckle under axial compressive load.The capacity of this connection for axial compressive load is approximately 97%of the yield strength of the hollow steel tube section,indicating that the connection has good compressive capacity.The load-displacement curves are consistent for specimens with different steel bar diameters,indicating that the compressive capacity of the connection is independent of the steel bar diameter.②Under axial tension,the specimen separates at the gap of the connection,and oblique cracks can be observed on the surface of the grout.The ultimate tensile capacity of the connection is approximately 28%—32%of that of the hollow steel tube when the diameter of the steel bar is 14—18 mm.The ultimate tensile capacity of the connection increases,and the ductility decreases with an increase in the bar diameter.③Under a bending moment,the specimen is subjected to tension on one side and compression on the other side.Furthermore,the specimen separates at the gap of the connection,and the grouting material in the tension zone presents oblique cracks.The bending capacity of the connection is approximately 37%—47%of the hollow steel tube when the diameter of the steel bar is 14—18 mm.The bending capacity of the specimen increases,and the ductility decreases with an increase in the bar diameter.Additionally,the displacements corresponding to the yield strength and the ultimate strength both increase with an increase in the bar diameter.

关 键 词：模块钢结构 节点 水泥基灌浆料 轴压性能 轴拉性能 抗弯性能 

分 类 号：TU391[建筑科学—结构工程]