关键词: 特高土石坝; 爆炸荷载; 动力响应; 数值模拟; 长河坝水电站;

Abstract: In order to study the dynamic response of the extra-high earth-rock dam under explosion load, based on Ansys-Workbench software, we established a three-dimensional finite element solid model for Changheba Hydropower Station. The simulation used 200 tons of symmetric arranged explosive as the load source, and focus on the displacement and stress of the dam under the explosion load. The results showed that the damage area was nearly elliptical in the dam body, with a length of 14.22 m in the horizontal direction and 29.96 m in the vertical direction, and a tensile stress up to 49.5 MPa in the outer area of the explosion point. The dam body far away from the explosion point had a smaller explosion impact range. The tensile stress and compressive stress increased at the core wall, which would induce crack in the core wall, so we should pay attention to the design and safe operation management of extra-high earth-rock dams.

Key words: extra high earth-rock dam; explosion load; dynamic response; numerical simulation; Changheba Hydropower Station;