混凝土坝坝体裂缝在地震荷载下扩展研究的几个关键问题

位于我国西部强震区的高混凝土坝,如小湾、二滩等,施工期或运行期在坝体表面以及坝体内部出现了一定范围的裂缝。鉴于这些高坝工程的极端重要性,裂缝在地震作用下的扩展性问题为学术界和工程界关注。针对混凝土坝坝体裂缝在地震荷载下扩展研究的关键性问题,包括地震动输入、坝体已有裂缝及其裂缝处理措施的模拟、缝端混凝土破损路径及其破损程度的模拟等研究现状分别进行讨论。最后指出了下一阶段的研究方向。

The key problems of crack propagation in concrete dam under earthquake loading

Abstract: There are a certain range of cracks on the dam surface or inside the dam body during the construction or operation period, such as Xiaowan, Ertan, which are high concrete dams located in west China with strong seismicity. In view of the extreme importance of safety of high concrete dams, the crack propagation problem of concrete dams under earthquake loading is of great concern in academic and engineering circles. The key and hot problems of crack propagation in concrete dam under earthquake loading, including ground motion input,simulation of cracks in concrete dam,and simulation of concrete damage at the end of the joint, were summarized respectively. Finally the research direction of the next stage was pointed.