Concrete Continuous Box Girder Solid Pier,0#Block Concrete Hydration Heat Temperature And Stress Field Analysis

With the aid of a special module in a large-scale finite element analysis software named Midas/Civil, this thesis takes the heat of hydration which leads to temperature cracks in solid pier in the process of a Solid pier and box girder0#block, large-span continuous prestressed concrete box beam construction as an engineering background, to analyze hydration thermal stress field. This thesis mainly research on reducing the disadvantage of the effects that the heat of hydration generated on construction by optimizing different layout schemes of cooling pipe in mass concrete. The main contents of the thesis are as follows:(1) Computing theory based on the thermal conductivity of concrete. Create a Midas/Civil finite element model.(2) Combined with the engineering practice, this thesis generates the comparative optimized scheme by comparing the calculated results with the original operating mode through the research and analysis of the optimization of the water speed in the cooling pipe as well as the inlet water temperature.Based on the analysis of optimization of vertical stratification in cooling pipe arrangement and cooling tube bending mode, it studies the scheme of controlling hydration heat by decreasing the overall casting temperature of concrete.(3) It conducts a finite element analysis of the concrete hydration heat in box girder0#block in temperature stress field which could be optimized by arranging appropriate amount of cooling tube.