Cable-stayed Bridge Cable Force Optimization Analysis

Cable-stayed bridge is made up by bridge deck system and supporting system of Bridges.The bridge deck system consists of stiffening girder,mainly compression,supporting system is composed of cables,mainly in tension.Cable-stayed bridge under the effect of stay-cables,can support than larger span beam bridge,and within a reasonable span,and more economic than suspension Bridges,more applicable,modelling is more beautiful.Therefore,both at home and abroad has a very wide range of applications.In this paper is set in Qianjin bridge,cable-stayed bridge as a bridge phase analysis of cable force optimizationmethod is presented,the application of minimum bending energymethod,influence matrix method principle,with cables,girders and the main tower bridge comprehensive stress distribution as the control target,cable forceoptimization model is established.Cable-stayed bridge is also the construction difficulty bigger,process more complex a bridge,to determine the reasonable application of cable-stayed bridge In the process of operating condition of cable-stayed bridge construction structuresafety is very important.As a cable-stayed bridge cable support systemis adjustable.therefore,of reasonable choose to become the core problem in the processof thecable-stayed bridge construction.Using formal iterative method to determine the initial cable force of cable-stayed bridge construction just suits to synchronise with construction processcalculation,instead of the structure of pour down,to avoid the prestressed concretestructure,concrete shrinkage,creep,structure,geometry nonlinear and demolitionof folded section and bearing unit is not brought by the closed questions,not onlygreatly reduce the workload,but also can get a satisfactory calculation accuracy.To explore the construction status of determination method,construction scheme and factors influencing the reasonable cable-stayed bridge into the state of the bridge,put forward to ensure the reasonable state into a bridge and theconstruction status of the main technical requirements,and determine the cableforce of cable-stayed bridge construction stage for the next step to lay the foundation.