The Temperature Field Analysis For Long-span Continuous Rigid Frame Bridge And Box Section Type Analysis On Temperature Load Effect

Under the effect of the temperature load, Long-span prestressed concrete bridge structures will induce a great forces, lower section of the crack resistance, and the structure may generate cracks, which will seriously affect the safety and durability of the bridge.Temperature effect the structure of relatively large by the environment. There are many mathematical models, States regulate the temperature gradient in considering the characteristics by which value is also different emphases. Comparison of design standards for the domestic and international provisions related to the temperature gradient on the structural effects of stress and strain, Paper to an actual four-span continuous rigid frame bridge as an example, Analysis of long-span continuous rigid frame bridge in a different stress distribution under thermal gradient, Comparative analysis of the characteristics of each mode.After pouring massive concrete, results released in hard cement hydration heat, concrete temperature gradually rises, heat generated can not be timely released, structure formation within the high and low outside temperature difference, concrete surface tensile stress is greater than the tensile strength of concrete will crack. The third chapter, use the finite element software to simulate 0# block construction hydration heat problem. Discussion on construction process of cement hydration heat on the effects of changes in No.0 block inside and outside temperatures.While the Bridge location and azimuth is determined, Climate and solar radiation and other factors becomes constants, Effects of bridge structure temperature field of variables is the box girder of geometrical size, flange plate length, Web Design factors such as the high inch.In the fourth chapter practical example of the Continuous Rigid - frame bridge, pursuant to the section size of the bridge, geographical location and intensity of the solar radiation and other factors, Analysis of different cross - section parameters on Box Girder temperature field and Temperature Stress influence.