宽幅钢箱梁横隔板与U肋过焊孔构造研究

发布时间：2018-02-13 15:37

本文关键词： 钢箱梁横隔板 U肋过焊孔疲劳性能有限元法参数分析　出处：《桥梁建设》2017年03期 　论文类型：期刊论文

【摘要】：宽幅钢箱梁横向受力较大的特征使得横隔板与U肋过焊孔周边细节构造容易出现疲劳破坏。为提高该细节构造的疲劳性能,以沌口长江公路大桥为背景,针对横隔板U肋过焊孔的常用形式,采用ANSYS软件建立钢箱梁节段的有限元模型,通过仿真分析比较不同形式过焊孔的结构强度及疲劳性能,结合其局部受力机理及参数化分析,提出改进的过焊孔形状和加厚横隔板顶部齿形板的优化措施,并利用损伤度原理验证改进效果。结果表明:提出的横隔板与U肋过焊孔改进形式明显改善了该细节构造的疲劳性能;加厚横隔板顶部的齿形板,可明显降低过焊孔的疲劳应力幅,提高其疲劳寿命。
[Abstract]:In order to improve the fatigue performance of the wide steel box girder due to the large transverse force, the detail structure around the transverse diaphragm and the U-rib overwelded hole is prone to fatigue damage. In order to improve the fatigue performance of the detailed structure, the background of the bridge is the Changjiang River Highway Bridge. The finite element model of steel box girder segment is established by ANSYS software. The structural strength and fatigue performance of different types of overwelded holes are analyzed and compared by simulation, combined with local stress mechanism and parameterized analysis. The optimization measures of the overwelded hole shape and the top tooth plate of the thickened transverse partition are put forward. The improved effect is verified by the damage degree principle. The results show that the improved form of transverse diaphragm and U-rib overwelding hole obviously improves the fatigue performance of the detailed structure, and the tooth plate at the top of thickened transverse partition plate, The fatigue stress amplitude of overwelded hole can be obviously reduced and the fatigue life of overwelded hole can be improved.
【作者单位】：中交第二公路勘察设计研究院有限公司;
【分类号】：U441.4

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