Temperature Effect Analysis of Hybrid Girder Cable-Stayed Bridge with Single-Tower
[Purposes]In order to study the mechanical properties of hybrid girder cable-stayed bridge with single-tower under the influence of temperature.[Methods]The finite element model is established based on Xiangluzhou Bridge.Based on the analysis of structural stress,displacement and cable force,different temperature effects are introduced as indicators,and the system temperature difference,cable-girder(tower)temperature difference and gradient temperature difference are selected as control objec-tives.Therefore the parametric study of concrete beam section,steel-concrete composite section,steel box girder section and stay cable is carried out.[Findings]Steel-mixed girder segments affect the stresses and vertical displacements of cable-stayed bridges by changing the mass and stiffness distribu-tion of the girder segments.[Conclusions]The analysis results show that in the finished dead state,the overall temperature difference and gradient temperature difference have little effect on the stress and verti-cal displacement of the beam section,while the overall temperature difference has a more obvious effect on the cable force than the gradient temperature rise.The mechanical properties of the bridge structure are greatly affected by the temperature difference of the cable beam(tower).Full attention should be paid to the structural design,construction process monitoring and bridge state monitoring of the cable-stayed bridge.
cable-stayed bridgetemperature effectfinished dead statemechanical propertiesfinite el-ement analysis
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