Loading...
| Friend's email | |
| Your name | |
| Your email | |
| enter code | |
This page was sent successfuly
- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 43283 (09)
- University: Sharif University of Technology
- Department: Civil Engineering
- Advisor(s): Ghayemiyan, Mohsen
- Abstract:
- Supplying water has almost always been the essential need of human for agricultural, industrial and drinking water use. One of the infrastructure works to catch up to this goal is dam construction. Among all of dams, concrete gravity dams have been fortunate between designers and builders of dams, because of their acceptable function against seismic loads. So, analyzing the function and stability of dams is important in different cases. Formed crack in dam body is one of the most important parameters that affects both the function and durability of a concrete gravity dam and considering the measure of the earthquake effects on the formation and expansion of crack profiles many studies have been devoted to crack analysis. Moreover, in concrete gravity dams once a crack is formed concrete enters into non-linear phase and hence the assumption of linear behavior is inappropriate to analyze the seismic response of dams. On the other hand, nonlinear systems are sensitive to initial conditions. It means that an infinitesimal change in the initial conditions can result in large changes in the final response and the responses will be unpredictable. Modeling the damping parameters is one of the most effectual characteristics in concrete dams’ analysis. Since in engineering studies the viscous damping mechanism, because of its easiness has been used to solve the equations of motion, this investigation deals with the effects of different damping types on the results of nonlinear analysis of concrete gravity dams and expansion of crack profiles. The foundations are modeled for two types of mass less and rigid. Five earthquake records are used with two PGA that is applied to each dam. The computer program, modeling and using criteria have been represented in different sections, also. Considering the results we tried to introduce the appropriate model of damping in analyzing the concrete gravity dams. After doing over 560 analyses on three concrete gravity dams with various heights, it is concluded that in the non-linear analysis of concrete gravity dams designer is responsible for choosing of appropriate models of damping and we can’t introduce one especial model for appropriate analysis of all dams, with certainty
- Keywords:
- Nonlinear Dynamic Analysis ; Concrete Gravity Dam ; Damping ; Crack Profile
Digital Object List
-
محتواي پايان نامه
- view
Bookmark