Analytical study on estimating bolt axial force of flush endplate connection
Analytical study on estimating bolt axial force of flush endplate connection
复制标题
平端板连接螺栓轴力估算的分析研究
DOI：
10.11532/structcivil.67a.398
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
山口 隆司
中科院分区：
文献类型：
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作者：
杉本 悠真;山口 隆司
近年来，在桥梁结构领域对平端板连接的要求越来越高。然而，目前还没有提出这种连接中螺栓轴力的估计方法。本文提出了一种基于有限元分析的平直端板连接螺栓轴力估算新方法。首先，通过对节点单元的分析，推导出能够模拟平接端板连接螺栓力增量的撬力系数和节点刚度公式；其次，对具有低杨氏模量区域的下翼缘的梁进行分析，得到了下翼缘、水平加劲肋和腹板的作用力计算公式。最后，利用这些公式建立了螺栓轴向力的新估计方法。
Recently, the demands of flush endplate connections have been increased in the field of bridge structures. However, no estimation-methods are proposed of the bolt axial force in such connections. This study proposes a new estimation method of the bolt axial force in flush endplate connections by FE analysis. Firstly, prying force coefficient and joint stiffness formulas are derived from the analysis of joint elements which can simulate the bolt force increment of flush endplate connections. Secondly, formulas for acting force in lower flange, horizontal stiffener and web are also obtained from girder analysis with a lower flange that has the low-Young's-modulus-region. Finally, the new estimation method for a bolt axial force is established by these proposed formulas.