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
刘廷勇 1张爱林 2李久林3
作者信息
- 1. 北京工业大学城市建设学部,北京 100124;北京城建集团有限责任公司,北京 100088
- 2. 北京工业大学城市建设学部,北京 100124
- 3. 北京城建集团有限责任公司,北京 100088
- 折叠
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.
Abstract
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 el-ement(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 simula-tion 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 signifi-cantly 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 ten-sile/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 pre-stress 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Key words
fully-prefabricated space steel structure/prestressed high-strength bolted joint/tensile perform-ance/compressive performance/parameter analysis/joint design引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
万方数据