The Finite Element Analysis Of Concrete Face Rockfill Dam Considering Multiple Physical Field

Concrete face rockfill dam(CFRD) technology was introduced relatively late in our country, but it developed at a very swift and violent speed. Owing to its good applicability, safety and economy, it has been widely accepted and widely used in engineering in recent years. It was once the preferred types of dams in dam engineering industry. Thus, much experience in dam construction, test running and the design has been accumulated, study on the CFRD and calculation method of it have made much progress as well. Especially the series of scientific research achievements of the finite element analysis further promote the technology of CFRD.However, there still exist more or less some problems in practical engineering. Among the problems, the universality of concrete face cracking is the most serious, which in turn shows the deficiency of CFRD. Therefore, stress calculation of concrete face has become one of the key issues in rockfill dam calculation analysis. On account of the complexity of working environment of the concrete face, many factors affecting the size of the stress level remain to be considered carefully. Besides, the effects on the stress distribution of the face are needed to be thought about and analyzed.First of all, factors of cracking in concrete face will be briefly discussed in this paper, which paves the road for the fin ite element analysis below. Then based on the ANSYS program platform, the rockfill material constitutive mode will be designed, which will benefit the analysis of rockfill dam. The employment of the functions of cell life and death and multiple load steps will make the simulation process of upstream water storage and construction of rockfill dam possible. In combination with practical engineering example calculation results, the stress and deformation distribution of rockfill dam during construction period under the action of the gravitational field, the water storage period under the hydraulic load, and the deformation distribution of the concrete face during water storage period will be explored. And the real work character of concrete face rockfill dam will be revealed.In addition, taking the change of day temperature's sudden drop during the initial concrete pouring period into consideration, the distribution of temperature field and stress field will be calculated and analyzed. Thus, the law of tempera ture distribution at various temperatures will be uncovered. Calculated the influence of temperature drop on stress distribution during the concrete face construction and analyzed the influence of temperature stress distribution under different constraint conditions, summarized the distribution regularity of temperature stress. By means of the practical engineering project, the probability of producing of concrete face crack will be discussed. By comparing the trend, the depth, the distribution rules of the crack in the practical engineering with the calculation results of finite element, the main causes of concrete face cracks in the actual project will be figured out. The corresponding suggestions on reinforcing the concrete face will provide technical support for design and construction. Moreover, considering the great impact of temperature on the concrete face, precautionary measures will be taken in project design.