Study On Considering The Coupling Of The Temperature Field And Stress Field Of The Mechanical Properties Of Short Tower Cable-stayed Bridge Box Girder

Low tower cable-stayed bridge being from continuous girder bridge is different from ordinary cable-stayed bridge.The short tower cable-stayed bridge is more flexible on section design than continuous girder bridge,and also section size can be reduced.Compared with the ordinary cable-stayed bridge,it elimates obstacles sense on the vision,and also relative economic.This arcticle based on Bazhong dongmen Bridge engineering uses the large general finite element software Midas Civil modeling of the whole bridge.The stress performance of low tower cable-stayed bridge is studied mainly from the coupling of temperature field and stress field.(1)Through the analysis of monitoring data as well as deriving existing theoretical formula,it is concluded that temperature distribute regularities along longitudinal,transverse and vertical in the box girder,as well as fitting out of temperature gradient function along the vertical of it.(2)Under multiple temperature gradient,it concludes the difference of the mechanical properties between this paper and various specifications,comparing and analyzing the differerce of the mechanical propertiers.(3)Each temperature gradient criterions corresponding to different temperature characteristic value.Therefore,this paper analyzes the changes of the mechanical effects of the box girder with two different values of independent change.At the same time,when the two characteristic values change with each other,the mechanical effect of the structure is changed.Their coupling deflection of the structure is parabolic and sine curve distribution by software analysis.