| Focused on the subjects of temperature control and crack prevention, this paper is mainly about the study of the simulative calculation of the unsteady temperature and thermal stress field in the RCC gravity dams. The research of temperature control of the Madushan RCC gravity dams is also presented in this paper. The main contents are as follows:1. In order to reduce the work of calculation, the model of the non-homogeneous multi-laminate element is applied here to simulate the temperature and stress field of the high RCC dams. The theory of this method is strict in Mathematics and can cut down the large work of the simulative calculation.2. According to the values of temperature attained by the test, we use the method of GA to reverse several parameters of concrete. It is convenient to get the parameters needed in the project by using the back analysis method.3. Based on the simulation model of the non-homogeneous multi-laminate element, a large 3-D program for high RCCD has been developed. The result of the comparison between the values of temperature gained by classical method and FEM respectively shows that the latter method is valid.4. Based on the previous research, the theories of facture and strength of the induced cracks in RCC dams are introduced and studied here as well as the model and the strength factors of the induced cracks.5. Based on the Madushan project, the subject of temperature control and prevention from the cracking of a typical overflow section block of the RCC gravity dam is studied as a case study.
|
PDF Full Text Request