钢管束组合剪力墙端板节点单边高强螺栓连接性能研究  

Study on Single Side High Strength Bolt Connection Performance of Steel Pipe Bundle Composite Shear Wall Endplate Joints

作　　者：陈群 王燕[1] 安琦[1] Qun Chen;Yan Wang;Qi An(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《钢结构（中英文）》2023年第8期22-33,共12页Steel Construction（Chinese & English）

基　　金：国家自然科学基金项目(52078258);中国博士后科学基金项目(2018M642631)。

摘　　要：为对钢管束单边高强螺栓连接的极限承载力和破坏模式进行研究,对钢管束单边高强螺栓连接进行单调拉拔试验和有限元数值模拟,分析了端板厚度和钢管束厚度对连接承载力和破坏模式的影响,并基于试验结果和有限元参数化分析结果,推导了钢管束单边高强螺栓连接的初始抗拉刚度理论公式。首先,通过改变钢管束单边高强螺栓连接的端板厚度、钢管束厚度以及螺栓种类共设计制作了5个钢管束单边高强螺栓连接试件进行单调拉拔试验。为使试验结果偏于安全,试件未填充混凝土,即不考虑混凝土的有利作用;其次,对钢管束单边高强螺栓连接进行有限元数值模拟,并将有限元模拟结果与试验结果对照,以验证有限元建模方法的正确性,同时采用相同的建模方法对钢管束单边高强螺栓连接进行参数化分析,进一步探究钢管束厚度和端板厚度变化对钢管束单边高强螺栓连接力学性能的影响;最后根据试验结果和有限元参数化分析结果采用组件法推导出了钢管束单边高强螺栓连接的初始抗拉刚度公式,并将理论数据与有限元模拟结果进行比较,对公式的准确性进行验证。研究结果表明:钢管束单边高强螺栓连接的破坏模式为钢管束鼓曲,螺栓孔产生塑性变形,单边高强螺栓外套管发生弯折导致单边高强螺栓被拔出,与钢管束普通高强螺栓连接螺栓孔被拉断的破坏模式不同;增加钢管束的厚度可以显著提高钢管束单边高强螺栓连接的承载力和初始抗拉刚度;单边高强螺栓连接虽然承载力和塑性变形能力较普通高强螺栓连接低,但在安装时无需预留安装手孔,避免了焊接施工对冷弯薄壁型钢受力性能的不利影响;有限元数值模拟结果与试验结果具有一致性,证明有限元模型建模方法可靠,且参数化分析结果进一步表明了钢管束单边高强螺栓的力学性能主要受钢管束厚度�In order to study the ultimate bearing capacity and failure mode of single side high strength bolt connection of steel pipe bundle,the monotone drawing test and finite element numerical simulation of single side high strength bolt connection of steel pipe bundle were carried out,and the influence of end plate thickness and steel pipe bundle thickness on the connection bearing capacity and failure mode was analyzed.Based on the test results and finite element parametric analysis results,the theoretical formula of initial tensile stiffness for single side high strength bolt connection of steel pipe bundle is derived.Firstly,by changing the thickness of the end plate,the thickness of the steel tube bundle and the type of the bolt,5 steel tube bundle single side high strength bolt connection specimens were designed and made for the monotonic drawing test.Moreover,in order to make the test results biased to the safety,specimens were without filling concrete,and the beneficial effect of concrete was not considered.Secondly,the finite element numerical simulation is carried out on the single side high strength bolt connection of the steel pipe bundle,and the finite element simulation results are compared with the test results to verify the correctness of the finite element modeling method,and the same modeling method is used to carry out parametric analysis on the single side high strength bolt connection of the steel pipe bundle.The influence of tube bundle thickness and end plate thickness on mechanical properties of single side high strength bolt connection of tube bundle was further investigated.Finally,according to the test results and finite element parametric analysis results,the initial tensile stiffness formula of steel pipe bundle single side high strength bolt connection was derived by component method.The theoretical data was compared with the finite element simulation results to verify the accuracy of the formula.The results show that the failure mode of single side high strength bolt connection of steel pi

关 键 词：钢管束 单边高强螺栓 初始抗拉刚度 抗拉拔 

分 类 号：TU398.9[建筑科学—结构工程]