Comparative Selection and Optimal Design of Cable-stayed Bridge Structure System
In order to study the influence of structural system differences on the overall structural mechanical characteristics of cable-stayed bridges,the large-span cable-stayed bridge of Qiwang Road in Lu'an City was taken as the engineering background,and the pylon beam consolidated cable-stayed bridge system,the pylon beam consolidated cable-stayed bridge system and the semi-floating cable-stayed bridge system were established,and the structural system models of different cable-stayed bridges were established by using finite element software.The internal forces of the main beam,tower and pier under static load and seismic load are analyzed re-spectively.The results show that the bending moment of the main beam and the main tower of the cable-stayed bridge under static condition is smaller than that of the other two structural systems.Under the action of standard combination,the maximum bending mo-ment of the main beam and the maximum bending moment of the main tower are reduced by 39.50%and 65.08%respectively.How-ever,the stiffness of the main girder of the cable-stayed bridge with the tower beam consolidation system decreases,and the maximum deflection of the mid-span reaches 88.4 mm under the action of automobile load.It is more advantageous to stress the main beam and the bridge tower under seismic conditions.
cable-stayed bridgestructural system comparisontower beam consolidationtower pier beam consolidationsemi-float-ing
万方数据
维普
