The Concrete Arch Dam Construction And Operation Process Simulation Study

Arch dam is an important dam type, in the construction of water conservancy and hydropower, it occupies a very prominent position. It's reasonable structure, beautiful body, safe and economic superiority make it has been widely used both at home and abroad. But because of their own special space arch dam shell structure and complex geometry features, its construction period and the boundary conditions of the situation is complex, this make some rhythm potential safety problems in the construction period and the certain extent. Therefore, the simulation of the arch dam construction and operation period by our system, as well as boundary conditions, analysis of the impact of the construction process and the most dangerous period could make some useful work for operation of the arch dam engineering design and construction.At present, the principal stress analysis for the arch dam mainly contained arch beam method and the finite element method. Finite element method is more perfect and advanced than arch beam method, it is a relatively accurate method, and it's calculation functions is more strong than structural mechanics methods, it can be dealt with arch beam contained many of the difficult issues, finite element can be considered large orifice, complex foundation, piers and other irregular shape of gravity, but also can be simulated arch dam construction and operation process, reasonable considering the overall stiffness arch dam, dam and foundation interaction. Finite Element Analysis of the dam stability and strength at home and abroad has been a large number of engineering practice, the concrete arch dam stress analysis and application also has accumulated a wealth of experience, with the arch dam construction, the application of the finite element method will be more extensive and in-depth.In this paper, the actual projects, using finite element analysis principles to ANSYS8.1 FEM software platform for the arch dam construction and operation period for the stress and displacement simulation calculation. First of all, according to the actual project information and the establishment of the arch dam , foundation, and excavation section; pouring sequence followed by a contraction joints mesh body, to adopt SOLID92 unit of the dam and the dam foundation to form a finite element model; Then gravity load imposed gravity loads were calculated by the overall progress of the project and the role of step-by-step role both cases, calculation completed, the use of Boolean operation, the dam combined to form an integrated model to achieve closure arch arch dam; followed by arch dam operation of water, sediment loads, and with the temperature changes throughout the year, 12 months of the temperature field, and then the temperature stress calculated in accordance with the final results were calculated to create working conditions, working conditions combined use of different load combinations to achieve The role of the results.Papers reviewed the entire finite element principal stress analysis arch dam and development of the principles of the status quo, using ANSYS software through on the two options, the status of the various terms described arch dam construction and operation period simulation the calculation methods and principles . Contrast consider the construction process and did not take into account the two arch dam construction process themselves load alone, of the arch dam construction process stress and deformation effects. At the same time, the operation of the dam water, sediment load and temperature, temperature stress calculation, analysis arch dam into operation period, the dam of stress and displacement changes, summed up the most disadvantaged arch dam temperature drop and the temperature or load combination, that is, the most dangerous operation period, and with the existing norms arch dam "concrete arch dam design specification" (SL282-2003) were compared.