For further optimization design, the influences of weld length, stiffening rib and diaphragm plate for the web stresses distribution are studied and compared.

研究焊缝长度、加劲肋和横隔板等对腹板应力的影响，探讨锚固区设计的进一步优化。

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But with the same length of straight seam pipe than the weld length of 30 ~ 100%, and lower production rate.

但是与相同长度的直缝管相比，焊缝长度增加30 ~ 100%，而且生产速度较低。

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Moreover, the difference of J-integral values increases with the increasing of the load and strength mismatching difference and the path-enclosed length of interface between weld metal and base metal.

载荷越大，焊缝与母材的强度差别越大；积分路径中包含的焊缝与母材界面长度越大，J积分的差值越大。

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