Analysis Of Sunshine Temperature Effect For Continuous Curved Box Girder Bridges

In recent years, curved girder bridge can adapt to the terrain features and can be widely used in construction of high speed way and city interchange for beautiful shape along with the rapid development of city construction and transportation. Curved girder bridge,which plane linear is a kind of curve, and the force characteristic is more complex than straight girder bridge, the ateral torsional coupling phenomenon is produced to increase the vertical deflection of bridge under dynamic loading.The curved girder bridge is always impacted by temperature of the surrounding environment any time in natural conditions. The temperature stress constraint is produced under temperature load Because of the poor thermal conductivity, This temperature stress can sometimes achieve order of magnitude with the dynamic stress.Thermal stress and deformation is produced by deduction of curve beam of sunshine temperature load in theory. Finite element mathematical model is established to seriously calculate the temperature effect of three span continuous curved double room box girder bridge.Establishing Midas element model sunshine temperature gradient load and loading sunshine temperature gradient load by the standard of highway bridge load, the temperature effect of three span continuous curved double room by calculating respectively of different radius of curvature, span ratio and support form.The longitudinal temperature stress and transverse temperature stress with different radius of curvature is calculated by establishing Midas/Fea soled element model to find maximum stress location and help the calculation in engineering design. The conclusion is came to compare and analysis the calculation results of beam element model and them above.In reference to a plane curve of curve bridge, considered the inside and outside force of support distribution that combined affection from concrete gravity load and sunshine temperature gradient load, and provided reference data for curve bridge design by conclusion.