负载下钢结构端板连接节点焊接加固受力特性的有限元分析

发布时间：2019-05-07 13:14

【摘要】：为研究负载下端板连接节点焊接加固的有限元分析方法和其受力特性,通过有限元软件ANSYS建立有限元模型,对4个不同初始负载下端板连接节点焊接加固受力特性进行了分析。目前常用的方法仅采用生死单元,并未考虑焊接过程的热影响。本文采用间接热结构耦合的分析方法,考虑了随温度变化钢材材性的变化和焊接热过程,并提出能够考虑负载下焊接加固过程的有限元分析方法。通过将有限元分析结果与试验结果作对比,验证了该有限元模型及分析方法的可行性。有限元分析结果表明,钢结构端板连接节点的焊接加固受力特性受初始负载的影响较大。
[Abstract]:In order to study the finite element analysis method of welding and reinforcement of end-plate joints under load and its stress characteristics, the finite element model was established by finite element software ANSYS, and the stress characteristics of four end-plate connections under different initial loads were analyzed. At present, only birth and death element is used in the common method, and the heat effect of welding process is not taken into account. In this paper, the indirect thermal structure coupling analysis method is adopted to consider the change of steel material properties and welding heat process with the change of temperature, and a finite element analysis method which can take into account the welding reinforcement process under load is proposed. By comparing the finite element analysis results with the experimental results, the feasibility of the finite element model and the analysis method is verified. The results of finite element analysis show that the stress characteristics of end-plate joints in steel structures are greatly affected by the initial load.
【作者单位】：中铁第六勘察设计院集团有限公司;贵州大学空间结构研究中心;清华大学土木工程系土木工程安全与耐久教育部重点实验室;
【基金】：《钢结构加固设计规范》国家标准管理组科研专项课题(2013-01)
【分类号】：TU391

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