全装配大跨度空间钢结构预应力-高强度螺栓连接节点性能研究  

Research on the Performance of Prestressed High-Strengh Bolted Joints of Fully-Prefabricated Long-Span Spatial Structures

作　　者：刘廷勇 张爱林[1] 李久林[2] LIU Tingyong;ZHANG Ailin;LI Jiulin(Faculty of Architecture,Civil And Transportation Engineering,Beijing University of Technology,Beijing 100124,China;Beijing Urban Construction Group Co.,Ltd.,Beijing 100088,China)

机构地区：[1]北京工业大学城市建设学部,北京100124 [2]北京城建集团有限责任公司,北京100088

出　　处：《工业建筑》2024年第8期44-53,共10页Industrial Construction

基　　金：国家自然科学基金重点项目(52130809);国家自然科学基金项目(51878025);北京博士后工作经费资助项目(2022-ZZ-092)。

摘　　要：创新全装配式大跨度预应力钢结构体系是其智能建造的基础,构建了预应力-高强度螺栓连接节点,研究了关键参数对节点性能的影响规律。采用ABAQUS有限元软件建立节点有限元模型,通过将试验结果与节点抗弯性能数值模拟结果进行对比分析,验证了节点模型的准确性与可靠性。在此基础上,设计54组节点算例对影响节点抗拉/压性能的各因素开展了参数化分析,提出了节点抗拉/压设计方法。结果表明:增加圆盘厚度可显著提高节点的抗拉/压性能;降低开孔角钢厚度可适当提高节点抗拉屈服荷载,但降低了节点抗压极限荷载;节点抗拉/压极限荷载均随开孔十字板厚度增加而提高;套筒高度变化对节点抗拉/压性能影响均较小;增加初始预紧力可提高节点初始抗拉刚度,但降低了其初始抗压刚度。In order to promote the innovation and intelligent construction of fully-prefabricated long-span prestressed steel structures,a novel joint which named prestressed high-strength bolted(PHSB)joint was constructed.The influence of key parameters on the performance of PHSB joints was studied.The finite element(FE)model of PHSB joints was established by using ABAQUS FE software,and the accuracy and reliability of the joint model were verified by comparing the experimental results with the numerical simulation results.In the parametric,54 FE models were established to study the effects of different parameters on tensile/compressive properties of PHSB joints.After that,the tension/compression design method of the joints was proposed.The results indicated that the tensile/compressive properties of the joints could significantly improve with the disc thickness increased;reducing the thickness of the perforated angle steel could appropriately increased the tensile yield load,but reduce its ultimate compressive load;the ultimate tensile/compressive load increased with the increase of perforated cross plate thickness;the change of the sleeve height had little effect on the tensile/compressive properties;moreover,increasing the initial prestress could increase the initial tensile stiffness,but reduce its initial compressive stiffness.

关 键 词：全装配空间钢结构 预应力-高强度螺栓连接节点 抗拉性能 抗压性能 参数分析 节点设计 

分 类 号：TU393.3[建筑科学—结构工程]