贯通高强螺栓梁柱端板连接节点静力受弯试验研究  

STATIC BENDING TEST OF BEAM-COLUMN JOINTS WITH PENETRATED HIGH-STRENGTH BOLTED END-PLATE CONNECTIONS

作　　者：钱晨阳 孙海林[4] 祝磊 QIAN Chenyang;SUN Hailin;ZHU Lei(Beijing Advanced Innovation Center for Future Urban Design,School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials,Beijing University of Civil Engineenng and Architecture,Beijing 100044,China;Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;China Architecture Design and Research Group,Beijing 100044,China)

机构地区：[1]北京未来城市设计高精尖创新中心,北京建筑大学土木与交通工程学院,北京100044 [2]北京建筑大学工程结构与新材料北京市高等学校工程研究中心,北京100044 [3]北京建筑大学北京市建筑结构与环境修复功能材料重点实验室,北京100044 [4]中国建筑设计研究院,北京100044

出　　处：《钢结构》2018年第12期12-17,共6页Steel Construction

基　　金：国家自然科学基金面上项目(51778035)

摘　　要：针对云冈石窟第18窟等比例整体复制需求提出了贯通高强螺栓梁柱端板连接节点的方案,为研究该节点的受弯静力性能,对4个节点试件进行了单向静力加载试验研究,分析了节点构造、螺栓扳手类型、节点域柱加强等因素对端板连接承载力、受弯性能、节点刚度和变形特性的影响。试验结果表明:当方钢管梁柱厚度为2 mm时,采用扭矩扳手拧紧小直径高强螺栓较人工扳手拧紧能提高节点1.3%的抗弯承载力和11.2%的初始刚度,采用嵌套内芯加强节点域能提高节点25.9%的抗弯承载力,内芯与柱嵌套紧密度高时,试件节点的初始刚度提高7.5%;采用嵌套内芯加强节点域的试件较未采用嵌套内芯加强节点域的试件节点域受压区抵抗变形能力提高87.5%;试件采用与柱嵌套紧密度较高的内芯加强节点域,节点域得到有效加强,破坏模式是梁底钢管屈曲;建议采用嵌套内芯加强节点域,同时保障内芯与柱嵌套的紧密度和高强螺栓预紧度。Single-direction static loading tests of 4 beam-column joints with penetrated high-strength bolted end-plate connections were carried out to investigate their mechanical properties based on the demands for the full-scale duplication of Cave No.18 in Yungang Grottoes. The influences of joint formation, bolt wrench type and column strengthening in the joint zone on the bearing capacity of end-plate connections, bending performance, joint stiffness and deformation characteristics have been analyzed. The test results indicated that tightening the small diameter high-strength bolt with the torque wrench could improve the bending capacity of the joint by 1.3% and the initial stiffness of the joint by 11.2% compared with the manual wrench when the thickness of the beam and column of the square steel tube was 2 mm. Using the nested inner core tube to strengthen the joint zone could improve the bending capacity of the joint by 25.9%. The initial stiffness of the joint was increased by 7.5% when the nesting tightness between the inner core tube and the column was high. The resistance to deformation of the joint zone was increased by 87.5% with nesting inner core tube and column to strengthen the joint zone compared with no inner core tube. When nesting inner core tube and column closely to strengthen the joint zone, the joint zone was effectively strengthened, and the failure mode was beam-bottom steel tube buckling. In order to enhance the effect of the connection, it is suggested that the nested inner core tube should be adopted to strengthen the joint zone, and the tightness between the inner core tube and the column nesting should be guaranteed,and the high-strength bolt pre-tightening should be ensured.

关 键 词：云冈石窟 贯通高强螺栓梁柱端板连接节点 静力受弯试验 

分 类 号：TU391[建筑科学—结构工程]