Analysis On Temperature Effect Caused By Hydration Heat On Segment 0# Of Continuous Rigid Frame Bridge

With the development of construction, the trend of various engineering constructions was toward larger scale in China. As for concrete structures, the increasing size of structure meant the rise in the amount of concrete, which could lead a series of problems of the hydration heat temperature effect. In the road constructions, the continuous rigid frame bridge was widely used. The amount of concrete pouring of segment0# was relatively large and the condition of its internal heat convection was poor. So the heat generated by cement hydration was easily gathered in segment0# and the internal temperature had a sharp rise. The temperature difference between inside and outside caused high temperature stress, even severe cracking of concrete structures. Therefore, it was necessary to study the effect of hydration heat in segment0# and explore its construction optimization measures.Professional finite element analysis software on bridge engineeringwas used to establish the solid model of segment0# with two different construction mode of continuous rigid frame bridge in this paper. According to its actual construction mode, construction simulation analysis was made and the corresponding results were compared. Analyzed the development law of hydration heat and temperature stress under different construction mode. Studied the influence of various parameters and construction mode on the hydration heat effect of segment0#. In addition, based on the calculated results of the actual construction mode, the author changed the parameters and construction mode to explore construction optimization measures which could reduce the hydration heat and temperature stress in segment0#. The calculation and discussion in the paper could play a positive reference in construction control of similar bridge.