+高级检索
拉剪复合作用下高强钢T型连接高温力学性能的数值与理论研究
DOI:
作者:
作者单位:

作者简介:

通讯作者:

基金项目:


Numerical and Theoretical Study on High-temperatures Mechanical Property of High-strength Steel T-stubs under Tension-shear Combined Loadings
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    为研究火灾下考虑附加轴力作用的高强钢T型连接的力学性能,在高温火灾试验的基础上采用有限元分析软件ABAQUS对高强钢T型连接进行数值分析,得到附加轴力作用下高强钢T型连接在火灾下的初始刚度、抗拉承载力、失效模式等,并与试验结果进行对比,校验了数值模型的有效性与准确性. 而后,采用经验证的有限元模型进行数值分析,研究了不同拉剪复合作用下高强钢T型连接在火灾下的力学性能,研究发现:随着剪拉比的增大,T型连接的抗拉承载力和极限位移会显著下降,螺栓成为高强钢T型连接在拉剪复合作用下承载的关键. 最后,结合《钢结构设计标准》对火灾下T型连接中高强螺栓受到的拉力与剪力的关系式进行理论推导,并与有限元模拟结果和试验结果进行对比分析,验证了所提出的关系式有较好的适用性,且能较为准确地预测火灾下螺栓的抗拉承载力.

    Abstract:

    To study the mechanical properties of high-strength steel T-stubs considering additional axial force under fire conditions, a numerical analysis of high-strength steel T-stubs was conducted using the finite element analysis software ABAQUS. The initial stiffness, tensile capacity, and failure modes of high-strength steel T-stubs considering additional axial force under fire conditions were obtained. The numericalanalysis results are compared with the test results to verify the numerical model.Subsequently, a parametric study was performed using the validated finite element model to examine the mechanical properties of high-strength steel T-stubs under combined tension-shear loadings under fire. The parametric study shows that with the increase of shear-tension ratio, the load-bearing capacity of the bolts becomes crucial to bear the load of high-strength steel T-stubs under the combined action of tension and shear, and the tensile load-bearing capacity and the ultimate displacement of T-stubs decrease sharply. Finally, the relational expression of the tensile force and shear force of high-strength bolts under fire conditions was deduced based on the Code for design of steel structures. The result was compared to the results obtained from the finite element simulation and experiments. The comparison shows that the relationship expression has good applicability, and it can accurately predict the tensile bearing capacity of bolts under fire conditions.

    参考文献
    相似文献
    引证文献
文章指标
  • PDF下载次数:
  • HTML阅读次数:
  • 摘要点击次数:
  • 引用次数:
引用本文

强旭红 ,陆宇航 ,王猛 ,姜旭 ?,陈武龙 .拉剪复合作用下高强钢T型连接高温力学性能的数值与理论研究[J].湖南大学学报:自然科学版,2023,(7):57~67

复制
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2023-07-31
  • 出版日期:
作者稿件一经被我刊录用,如无特别声明,即视作同意授予我刊论文整体的全部复制传播的权利,包括但不限于复制权、发行权、信息网络传播权、广播权、表演权、翻译权、汇编权、改编权等著作使用权转让给我刊,我刊有权根据工作需要,允许合作的数据库、新媒体平台及其他数字平台进行数字传播和国际传播等。特此声明。
关闭