Comparison and Selection of Arch Rib Hoisting Schemes for Spatial Y-shaped Steel Box Arch Bridge Based on AHM-TOPSIS Method
The combination of attribute analytic hierarchy process and TOPSIS can consider the weights of different evaluation indicators,improve the scientificity and objectivity of evaluation,make full use of the advantages of AHM,and avoid the possible subjective influence of weight allocation in TOPSIS.The arch circle of Jing River Bridge is divided into single-arch section and double-arch section,and the arch circle is Y shape in space.Aiming at the problem of Y-shaped main-secondary arch rib cable hoisting,research was carried out on the construction scheme of separate hoisting and simultaneous hoisting for the main and secondary arches.Based on AHM-TOPSIS method,the two construction schemes of spatial Y-shaped steel box arch bridge were compared,and the two hoisting schemes were simulated and analyzed through finite element calculation of the bridge.The influence of the corresponding construction hoisting scheme on the stress and structural stability of the bridge is obtained respectively,and the best construction scheme is selected by comparison:The main and secondary arches hoisting separately has obvious advantages.