折线形重力坝的抗震性能

Seismic performance of zugzag gravity dam

以某折线形常态混凝土重力坝为研究对象,运用有限元软件ANSYS数值模拟了全坝段整体地震场景下坝体的性能,通过分析应力集中区域,确定其薄弱位置,给出了优化施工断面的方案,以提高坝体的抗震性能。结果表明,在地震作用下,该折线形重力坝的坝踵、坝址以及转折处均存在明显的拉应力集中现象,最大拉应力值达到了6.08 MPa。该研究成果对折线形重力坝的设计、施工以及运行维护提供了参考。

This paper taking a zigzag normal concrete gravity dam as the research object,proposes a scheme of optimizing the construction section to improve the seismic performance of the dam body.The study involves numerically simulating the performance of the dam body under whole seismic scene of the dam section with the finite element software ANSYS;analyzing the stress concentration area;and determing the weak position.The results show that under earthquake process,the tensile stress concentration is obvious at the heel,the site and the bend of the curved dam with the maximum 6.08 MPa.The study provide a reference for the design,construction,operation and maintenance of the zigzag gravity dam.