The Research On Temperature Effect Of Long Span Reinforced Concrete Box-Beam Bridge

Temperature distribution, temperature effect from temperature distribution and temperature control problem in construction of long span reinforced concrete box-beam bridge have attracted attention of bridge experts and researchers both at home and abroad.In this paper, a temperature gradient mode of long span reinforced concrete box -beam bridge can be concluded, which is appropriate for the region characteristics in the bridge place, including temperature increment mode and temperature reduction mode, by the field temperature measuring and the simulation calculation and analysis of finite element software for long span reinforced concrete box-beam bridge. By the coMParison of corresponding norms about temperature load in bridge design standard home and abroad, it can be concluded that the result is reliable and the way of calculation is feasible, which can be the advice for the norms revision.By ANSYS finite element software, the simulation solid model of temperature field was established during cantilever construction. By the calculation and analysis of solar temperature effect during box bridge construction and the comparison with observational data in the scene, the simulation model of temperature field can be justified reasonable and temperature effect can be obtained during the construction of long span reinforced concrete box-beam bridge. The model of temperature field was established during operation phase by MIDAS/CIVIL software. By calculating and analyzing the temperature effect during transport operation phase, it can be concluded that the temperature effect during operation can not be ignored, for it is possible to become a major factor cause box beam crack, which should attract designers' attention. It is testified that the temperature gradient mode of the paper is reasonable and the result is in accordance with BS5400 and Chinese road bridge norm.Finally, by combining temperature control of box beam hydration heat in scene, establishing box beam solid model by applying finite element software, imitating temperature field distribution of concrete hydration heat, and comparing with...