Research On The Temperature Effect Of The Continual Rigid Frame Bridge With High Pier And Long Span And Construction Control

The continual rigid frame bridge is one kind of important bridge of modern traffic project type, whose temperature problem is always one of bridgework boundary research hot spot. Based on Shanghai-Chengdu-west express highway Hubei section Ye sanhe bridge construction, the paper ,through finite element method procedure ANSYS, has analyzed the temperature field and temperature strain distribution with the joint parts of the 3# pier platform and the pier of Ye sanhe Bridge.Through simulating construction process, temperature measure, the function and the border parameter by the fact that the various experiment ascertains material, during the process of calculation, the analysis have concerned concrete elasticity modulus change and water pipe cooling effect cooling down. The results have indicated that finite element model can be used to analyze the temperature field and temperature strain distribution, and provide reference for scheme comparison and selection of construction.According to the calculation pattern of standard temperature of different country and region, example as Europe and America, China studying, the paper has compared the curve bridge with straight line bridge of superstructure internal force and stress. Because Ye sanhe Bridge is a curve rigid frame bridge, the thesis has comparatively studied the bridge superstructure temperature effect of curve rigid frame bridge and straight line rigid frame bridge, due to difference in temperature face to face under the sunshine, with the different radius lower, different arc length and different radius lower.Building the space beam finite element method model, the paper has studied internal stress and displacement respectively with regard to pier and the superstructure section to calculating three kinds of representative sunshine working conditions on the box shape pier.Finally, the paper has adopted the finite element method ANSYS to discuss prestressing loss of parts of vertical and lateral direction prestressing tendon in 12# part of the main beams, because of heat of hydration by concrete around of the prestressing tendon and cement in duct. Recommendations for the values of prestressing loss are proposed.In the thesis, the continual rigid frame bridge temperature effect research provides reference for design, construction and security the monographic study appraising for similar continual rigid frame bridge with large span and prestressed concrete structure. The temperature control measures and simulated analyses about the mass concretes can be reference for the same type problem.