Treatment Measures Of Steel Box Arch Ribs Of Installation Errors

In this paper, As the engineering background of a X-type steel box arch bridge, As the finite element analysis software to analyze the overall and partial modeling of arch rib using Midas/civil and Midas/FEA,Study of the steel box arch rib joint deviation (dislocation) on internal force of the structure (especially the local stress) and distortion;At the same time, analyzed and discussed the steel box arch rib joint deviation (dislocation) of two kinds of treatment measures of effectiveness and their respective advantages and disadvantages,It has important guiding significance to Similar problems of the same type bridge. For example, assessment, treatment design and construction. Main contents of the following:(1) the steel box arch bridge was established based on finite element analysis program Midas space beam element finite element model and partial arch rib plate element model;(2) analyzed the above model in each component load and load combination under the action of internal force, stress and displacement characteristics;(3) comparison and analysis of the impact of dislocation on local arch rib stress and deformation generated by;(4) discussed two kinds of dislocation reinforcing measures of effectiveness and their respective advantages and disadvantages.Calculation results show that in the first phase of the load and phase into a bridge, dislocation of Seams less affected to the structure of axial force and bending moment, but to the structure stress influence, it causes moment stress concentration and the section stress increases accordingly. Stiffening rib and stiffening slabs have reinforcing effect for dislocation of Seams, but the stiffening rib reinforcing effect is much less than the stiffening plate. If the dislocation of Seams is more serious, may consider using stiffening plate reinforcement method. But the stiffening plate reinforcing method of construction technology demand is require higher, If the construction level is low, the reinforcing effect has great influence.