Early Hydration Heat Temperature Field Finite Element Analysis Of Mass Concrete

With the high-speed development of modern technology, our construction project made a big progress. Modern engineering structures are moving towards the volume is higher and higher, bigger and bigger, built more complex, the function is more comprehensive diversified development direction. It can cause micro-cracks, which will seriously affect the durability of the structure. The problem of concrete block being prone to crack placed in front of people because of temperature stress.This cracks on the structure seriously impact the use of structuer.So increasing the research of simulation study of the stress field of mass concrete structure temperature field and temperature in the early have a realistic significance. In order to practice state simulation project can be better and better for the practical engineering guide service.because of the many factors influencing temperature field caused by large volume concrete hydration heat of cement, this paper has done some research in the following aspects:1. Firstly analyzes the harm of temperature crack, research background, research status and research significance of concrete temperature field.2. This article focuses on the Taiyuan square bodied Modern Plaza area as an example, comparatively analysis of the different hydration heat model of large volume concrete structure temperature field, and the influence of temperature field distribution of the main parameters of a comprehensive comparison and analysis, put forward a series of measures to reduce the temperature cracks, consistent with engineering practice.3. Because a lot of thermal parameters can not through the formula or test, the accuracy is not high, resulting in a lot of calculation and simulation are not very accurate, and the actual value difference. In order to solve this problem, based on the surface heat transfer coefficient as an example of the inverse analysis of thermal parameters of concrete temperature field,on the thermal parameters were optimized by using ANSYS optimization module, and the optimized results and compared before the optimized results and the measured value, analyzed the optimized results and the measured value is closer, confirmed the feasibility of ANSYS optimization module to optimize the thermal parameters. The optimal result can be of certain guidance for actual engineering.