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锚拉板是斜拉桥的重要受力构件,其残余应力直接影响桥梁的疲劳寿命。实际锚拉板焊接施工时,每条焊缝均采用一定厚度的焊层进行焊接,具体焊层数和焊层厚度常依据经验确定且波动较大。因此,在探究焊缝层数和焊层厚度的优化取值上对斜拉桥锚拉板焊接残余应力的影响进行分析。首先根据斜拉桥锚拉板的实际焊接工艺,利用ANSYS软件建立了对接钢板和锚拉板的焊接有限元模型,进行了残余应力分析与试验验证。然后基于验证后的模型对实际锚拉板的焊接过程进行了残余应力分析,并探讨了不同焊缝层数对锚拉板焊接残余应力的影响,得出了具有工程实用价值的结论。
Anchor plate is an important component of cable-stayed bridge, the residual stress directly affects the fatigue life of the bridge. The actual anchor plate welding construction, each weld is welded with a certain thickness of the weld layer, the specific number of layers and welding layer thickness often determined empirically and volatile. Therefore, the influence of welding residual stress on the cable-stayed bridge’s anchoring plate is analyzed on the basis of the optimized values of welding seam number and thickness. First of all, according to the actual welding process of the anchor plate of cable-stayed bridge, the finite element model of welded steel plate and anchor plate is established by ANSYS software, and the residual stress analysis and experimental verification are carried out. Then the residual stress of the actual anchor plate welding process is analyzed based on the verified model, and the influence of different welding seam layers on the welding residual stress of the anchor plate is discussed. The conclusion of engineering practical value is obtained.