Abstract
In recent years, extensive studies have been conducted to ensure the safety and stability of concrete dams. The development of numerical methods in considering more factors affecting the response of dams and also increasing the accuracy of calculation methods has played an important role in ensuring the safety of concrete dams. Therefore, one of the most important points in the design and analysis of concrete dams is to predict the location of cracks, expand it, investigate the phenomenon of hydraulic failure, consider the pressure caused by the infiltration of reservoir water into cracks and joints in static and dynamic states, and find solutions prevention of dam destruction due to this phenomenon. In the study of the effect of tensile strength, with increasing tensile strength, the reservoir water level increases at the beginning of cracking and the final reservoir water level increases, but there is no linear relationship between tensile strength and the two responses. In general, in examining the refractive energy parameter in each of the states with and without taking into account the water pressure inside the crack, the results of the mentioned models are slightly different from each other, but comparing the results shows that in nonlinear analysis considering water pressure inside the crack failure energy change has a greater impact on the results of these models.
Highlights
Nowadays, it is possible to formulate the dam-foundation system in order to consider parameters such as dam interaction, foundation, presence of joints in the dam body, cracking and crushing of concrete in tension and pressure, opening and closing and slipping of cracks, sediment effect, the study of the effect of rotating components earthquakes, and the like
In order to evaluate the accuracy of the computer program prepared in this research, it is necessary to compare the results of the computer program in linear and nonlinear analysis with analytical and laboratory results
Is section examines the accuracy of the formulation and performance of a computer program in three stages
Summary
It is possible to formulate the dam-foundation system in order to consider parameters such as dam interaction, foundation, presence of joints in the dam body, cracking and crushing of concrete in tension and pressure, opening and closing and slipping of cracks, sediment effect, the study of the effect of rotating components earthquakes, and the like. Due to the limitations of the analytical method to consider the effect of all effective factors and the growth of computer technology, different numerical formulations were proposed for the analysis of the dam-pi-reservoir system; the finite element method is one of the most effective of these methods. To this end, Zienkiewicz proposed a finite element formulation for solid and fluid. Visser used nonlinear fracture mechanics and a cracked model for two-dimensional analysis of the Quina weighted concrete dam. He used fixed and rotating cracked models with different shear strength factors in Quina dam analysis. e water level diagram was drawn according to the displacement of the dam head in order to compare it with linear fracture mechanics and plasticity [16]
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