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首页> 外文会议>International conference on intelligent information technology application;IITA2010 >Local Stress Analysis and Optimal Study on Crossbeam Web Cutout in Steel Orthotropic Deck
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Local Stress Analysis and Optimal Study on Crossbeam Web Cutout in Steel Orthotropic Deck

机译：正交异性钢桥墩横梁腹板局部应力分析与优化研究

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摘要

For such three typical crossbeam web cutouts as round-ended shaped, U-shaped and V-shaped, geometries were assumed according to some practical projects respectively. Then the local stresses were analyzed along the free edges of the additional cutouts in the background of steel orthotropic deck with longitudinal trapezoidal ribs. Comparative studies were carried out on the basis of further five optimal proposals presented for each type of cutout hole. The results show that stresses are smooth in the middle part of the edge and concentrated in the top corner for the round-ended shaped cutout. A relatively reasonable dimension can be found by inserting transition arc with various radii. There exist local exorbitant stresses on the top edges of both U-shaped and Vshaped cutouts. After altering the beeline obliquity and curve type of the top edge, a relatively reasonable combination line shape can be gained. The optimal cutout, with large radius arc at the middle part and small radius arc in the top, can also be obtained through comparative analysis by increasing the top arc radiuses and decreasing the cutout depth. Some recent construction practices confirm the validity of the results.
机译：对于这三种典型的横梁腹板切口，如圆头形，U形和V形，分别根据一些实际项目假定了几何形状。然后，在具有纵向梯形肋的正交异性钢甲板的背景下，沿着附加切口的自由边缘分析了局部应力。在针对每种切口孔提出的另外五个最佳方案的基础上进行了比较研究。结果表明，对于圆端形切口，应力在边缘的中间部分是平滑的，并且集中在顶部拐角处。通过插入具有不同半径的过渡弧，可以找到相对合理的尺寸。 U形和V形切口的顶部边缘都存在局部高应力。改变顶部边缘的直线倾斜度和曲线类型后，可以获得相对合理的组合线形状。通过比较分析，也可以通过增加顶部圆弧半径并减小切口深度来获得最佳切口，即在中间部分具有较大的半径弧，在顶部具有较小的半径弧。最近的一些施工实践证实了结果的有效性。

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