科研之友
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摘要
Strength safety problem of concrete gravity dam is a key issue in the dam design process. For purpose of realistic modeling of concrete dam, numerical method has achieved a dominant position. However, models need to be tested with filed experience to convince that they are applicable, and accompanying sophisticated numerical model makes preliminary design and safety evaluation of concrete dam cumbersome and difficult. So we propose a concise method for strength safety evaluation of triangle dam. In the new method, we apply upper stream water pressure and dam self weight on the dam model, and use an analytic solution to obtain dam stresses in the dam upper region (two thirds of the height of the dam superstructure). Then, we select Ottosen failure criteria to determine critically stressed locations and safe locations in the dam upper region. We compared the analysis results by the new method with simulated results by Ansys, and there is only slight difference. At last, by the new method, we evaluate effect of geometry parameters on upper region strength safety of an ideal right triangle dam considering dam self-weight and full upstream reservoir water pressure. Results indicate that when the dam wedge top corner angle increases, the upper region safety factor of strength is enhanced. The proposed fast method would indeed prove desirable and valuable because it is succinct and cost-effective for engineers to make preliminary design and strength safety evaluation of concrete dam. And the proposed fast method may also be used to check the analysis results by numerical simulation software.
- 出版日期2018-7
- 单位辽宁工程技术大学
