Research on the Distortion and Warping Effect of Irregular Steel Box Arch Ribs in Super Long-span Arch Bridges
There are fewer research on the distortion and warping of the irregular steel box arch ribs in ultra-large span arch bridges.In order to better understand the structural stress characteristics of these ribs and effectively con-trol the effects of section distortion and warping,a super long-span arch bridge was taken as an example.Finite ele-ment model of steel box arch rib was established by 3D Experience simulia software,The primary factors influencing the section distortion and warping was systematically analyzed.The results show that the optimal spacing of the transverse partition is about 3.0 m,and the optimal opening rate is 65％～85％.The effect of stiffening ribs on distor-tion warping and local buckling of steel box arch ribs is obvious.Under the condition of not affecting the inspection space inside the arch rib of the steel box,the setting of the silo plate has an obvious effect on improving the distortion warping of the section.which offer a foundation for optimizing the structure of the steel box arch ribs.
super long-span arch bridgeirregular steel box arch ribsdistortion and warpingfinite element analysis
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