Designing Parameter Optimization Of Single Tower Concrete Cable Stayed Bridge

Single pylon cable stayed bridge is by the tower,girder and cable three force component cable bearing system,cable-stayed bridge deck systems are usually composed of prestressed concrete or steel stiffening girder.Cable stayed bridge of the beam is a multiple inheritance,similar to that in the beam span increases the elastic support,which greatly reduces the moment of girder,reduce the beam height,decrease the weight of the main girder,thereby increasing the capacity of span.Because of its special structure advantage,oblique stayed bridge has become one type of modern bridge engineering development speed is the fastest and the most competitive.But there are still some problems in the study of the single tower concrete cable-stayed bridge system,especially in the design work,there are still some problems that have not been solved.A single tower concrete cable stayed bridge design parameters optimization problem of reason,on the one hand is derived from few bridge designers of the single tower cable-stayed bridge design parameters are optimized,because design parameters is not exist in isolation,each change a design parameter,often change the optimal value of other design parameters,in order to obtain a economical and reasonable in design,generally require iterative calculation of design parameters,which would greatly increase the design difficulty;on the other hand is because the design parameters of optimization methods is not the same,is still at exploring stage,has not formed a mature system,but also the need to further improve.The Sichuan Jiangyou City Fujiang bridge for practical engineering background,mainly for the cross single tower concrete cable-stayed bridge design parameters of the study.The main research contents of this paper: first briefly introduced at home and abroad of the single tower concrete cable stayed bridge development history,summarizes the single tower cable-stayed bridge structure and stress characteristics,and points out that the single tower cable stayed bridge development prospects and encountered problems.Then the 2015 to establish Fujiang bridge finite element model,the static analysis of the bridge and the displacement and internal force values obtained with the monitoring of the construction of the corresponding numerical were compared by using Midas civil.By comparison,the finite element model is consistent with the actual situation.Again to the original bridge model based,girder stiffness,tower height,distance between cable,no cable length as design parameters need to be discussed,respectively take a few reasonable parameter values computational structural in the deadload and live load and temperature load force characteristics and natural vibration frequency and vibration mode of the structure is analyzed.According to the calculation results can be obtained by changing the design parameters on the structure of the static dynamic characteristics.At the same time,the analysis and draws the reasonable value of design parameters,for type of bridge system provides the reference range for a design parameter.