CAJ | 학술논문

以正交异性钢桥面板焊接节点为研究对象，对焊接节点焊趾处不同的结构热点应力确定方法进行比较分析。利用有限元软件ANSYS分别建立焊接节点的实体单元和壳单元有限元模型，在焊趾附近区域共划分7种网格尺寸，分别采用直接提取法、表面外推法和结构应力法计算正交异性钢桥面板焊接节点焊趾处的结构热点应力，比较分析不同方法计算结果的精度及对网格尺寸和单元类型的敏感性。研究结果表明，对于不同网格尺寸和单元类型的有限元模型，直接提取法和表面外推法获得的结构热点应力离散性较大，结构应力法计算的结构热点应力具有较好的一致性。
이정교이성강교면판한접절점위연구대상，대한접절점한지처불동적결구열점응력학정방법진행비교분석。이용유한원연건ANSYS분별건립한접절점적실체단원화각단원유한원모형，재한지부근구역공화분7충망격척촌，분별채용직접제취법、표면외추법화결구응역법계산정교이성강교면판한접절점한지처적결구열점응력，비교분석불동방법계산결과적정도급대망격척촌화단원류형적민감성。연구결과표명，대우불동망격척촌화단원류형적유한원모형，직접제취법화표면외추법획득적결구열점응력리산성교대，결구응역법계산적결구열점응력구유교호적일치성。
A comparative study was conducted to determine the structural hot‐spot stress at the weld toe of the welded joint in the orthotropic steel bridge deck by use of different methods .The finite element models of the welded joint were established by the finite element software ANSYS with the solid element and the shell element ,respectively .Seven types of the mesh size were divided adjacent to the weld toe zone .The structural hot‐spot stress at the weld toe of the welded joint in the orthotropic steel bridge deck was calculated using the direct extraction method ,the surface extrapolation method ,and the structural stress method .The results obtained from different methods were compared in respect of the accuracy and the sensitivity with the mesh size and the element type . The achieved results reveal that when the finite element models are constructed by use of different mesh sizes and element types ,the structural hot‐spot stress calculated by the direct extraction method and the surface extrapolation method has significant discreteness ,while the structural hot‐spot stress derived from the structural stress method has good consistency .