Analysis And Research On The Optimization Of Cable Force Of Bridge Of Lengshuijiang City

In recent years,the cable-stayed bridge has been developed rapidly and received extensive attention.As an important part of the cable-stayed bridge,the cable-stayed bridge has an important influence on the cable-stayed bridge,and the adjustment of the cable force value can also affect the force of the bridge.The same cable-stayed bridge,with different cable force values,the displacement,deformation and internal force of the cable-stayed bridge are different.The cable force of cable-stayed bridge can be changed.Through simulation analysis,we find out the most suitable cable force value and make the cable-stayed bridge's optimum state of force.How to determine the most suitable cable force value has become a key issue in the analysis and research of cable-stayed bridge.This article takes Lengshuijiang bridge as the engineering background,first introduced the domestic and foreign development situation of the cable-stayed bridge,the cable-stayed bridge cable force optimization of the basic theory,methods and the optimization principle and influence factors.And then to the bridge as an example and analyzes the reasonable stress state of the cable-stayed bridge with Midas Civil software,and to structure the minimum bending strain energy and bending and tension compression strain energy and minimum as the objective function,optimization calculation of cable force on the bridge of the bridge,by adjusting the cable force,determine the reasonable cable force of the bridge.Then determine the bridge's initial cable tension by forward iteration method,finally this paper also analyzes the influence of temperature in the process of construction and control of cable force.In this paper,we compare the comprehensive knowledge and understanding of the related principle and method of optimization of cable force of cable-stayed bridge,and use Midas Civil to bridge analysis.The difference between the cable force value obtained in the paper and the cable force value provided by the design institute is within 7.77%,which is in accordance with the regulations and shows that this method is reasonable.Meanwhile,in the process of construction,we should strictly follow the construction procedure to ensure that the cable force difference is controlled within 2%,while avoiding the construction under extreme cold or high temperature.In this way,the loss of cable force in the construction process can be reduced,and the optimal cable force in the state of the bridge is more accurate.