Mass Concrete Structure Temperature Stress Calculation And The Analysis Of Fracture

With the development of economy, the mass concrete is not only widely used in Water conservancy project, bridge engineering and foundation engineering, but also in the building of the upper structure. After mass concrete casted, because of the cement hydration heat, its internal temperature rise fast, which make its surface under certain temperature stress. If the temperature stress is greater than the early tensile strength, surface will appear temperature cracks, which is adverse to the structure. It’s practical significant for the study of mass concrete.This article summarizes the research status of the mass concrete at home and abroad, in consideration of the initial temperature, air temperature, thermal conductivity, boundary conditions and factors such as creep, analyzed the theory of finite element method to solve the temperature field and stress field.Based on the monitoring data of practical engineering, it can get the inside and outside temperature change rule of massive concrete column and the maximum temperature difference. By using finite element software ANSYS to simulate the temperature field of the pillars in practical engineering analysis, and compares them in real monitoring data, the maximum error between theoretical results and measured results: 6.71 %. That simulation method used is reliable. In addition, by using the ANSYS to simulate the artificial cooling water pipe, it can get the concrete temperature field distribution of cooling water pipe. On the above results, it can put forward corresponding suggestions to construction.Using the reliable simulation method based on temperature field and stress field of a valve plate simulation analysis, it is concluded that the internal temperature and temperature stress, and calculates the stress direction stress surface. Combined with the measured and simulated data in the two projects, we can analyze the temperature cracks, and present the corresponding optimization suggestions.Finally, this paper summarizes the research achievements and the subject of mass concrete was discussed.