基于屈服线理论的螺栓端板连接方钢管柱承载力计算模型研究  

Yield line theory based loading capacity analytical model of bolted endplate connections to square hollow section columns

作　　者：王志宇[1] 王清远[1,2] 刘晓凯[1] 薛辉[1] 

机构地区：[1]四川大学建筑与环境学院,四川成都610065 [2]成都大学建筑与土木工程学院,四川成都610106

出　　处：《建筑结构学报》2016年第6期160-173,共14页Journal of Building Structures

基　　金：国家自然科学基金项目(51308363);四川省科技支撑计划项目(2015GZ0245;2015JPT0001);教育部创新团队项目(IRT14R37)

摘　　要：为研究螺栓端板连接方钢管柱的承载力,进行了11个连接件的单调静力试验,分析了钢管和螺栓的3种典型破坏模式,以及钢管管壁厚度、螺栓列距与直径、盲孔螺栓Hollo-bolt构造等因素对连接件承载力的影响,提出了预测该类连接承载力的改进屈服线计算模型。研究结果表明:螺栓端板连接方钢管柱的破坏模式与钢管管壁厚度以及螺栓列距相关,承载力随钢管厚度以及螺栓列距和直径的增大而增大;通过连接件整体位移和钢管管壁连接面竖向位移与荷载关系,按双线性屈服模型得出的承载力预测值与试验值相近;由连接件试验结果折算得到的预测结果可用于此类节点的屈服弯矩计算。基于屈服线理论建立的连接件承载力的计算模型的计算结果,与试验结果比较,二者吻合较好。In order to investigate the resistance of the bolted endplate connections to square hollow section columns, eleven connection specimens were tested by static loading tests. Three typical failure modes of steel tubes and bolts were analyzed and the influences of the tube wall thickness, bolt gauge width, bolt diameter and configuration of Hollo- bolt were analyzed. The yield line theoretical computational model was proposed to predict the resistance of such kind of connections. The experimental results show that the failure modes of bolted endplate connections to square hollow section columns are related to the tube wall thickness, bolt gauge width and bolt diameter. The resistance of the connections increases with the increase of the tube wall thickness and bolt gauge width. The bilinear yield model exhibits a close prediction of the resistance from the loads versus vertical displacements of overall connection and tube connection face. The yield moment of similar joints can be predicted through a conversion of the results of test connections. The theoretical computational model was built based on the yield line theory. From a comparison with test results, the suitability of this model was verified.

关 键 词：方钢管柱 螺栓端板 盲孔(单边)螺栓 静力试验 屈服线 承载能力 

分 类 号：TU391[建筑科学—结构工程] TU317.1