Hydration Heat Analysis Of Bearing Platform In Large Span Bridge Piers

With the rapid development of China’s transportation, so many mass concrete structures has been appearing in large bridges as well as the adoption of high-grade concrete. Temperature crack control of mass concrete has become more common, so simulated analysis of temperature field has become an important research subject.In this paper, taking QianJiang Bridge as the engineering background, temperature field was analysed by using ANSYS. The main contents of the thesis are as follows:(1) Based on thermal conductivity theory of concrete, the ANSYS finite element solid model was created according to the construction schedule, and including analysis of bearing platform drowned by water,the results show that the calculating results agree with measuring ones well,and the difference in temperature becomes to30℃after bearing platform drowned by water,which is not good for the development of concrete;(2) Analyses the temperature field of bearing platform that are the same volume but different cross sections, recommending that rectangle section have priority to be used in bearing platform;(3) 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 rate of flow in the cooling pipe as well as the inlet water temperature and initial temperature of concrete. Coming to a appropriate solution, proposing some important considerations in construction and design of bearing platform,which can provide reference.