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高拱坝的动力破坏特性越来越受到关注,动力特性和动力响应是其研究的一个重要方面。通过模型试验的方法研究高拱坝动力特性和动力响应的特征,动力特性试验比较了完好结构与有施工横缝结构的基阶动力特性,表明当结构存在施工横缝时,结构基阶频率降低,阻尼增大。结构动力响应采用振动台模拟地震波激励,试验结果表明,完整结构与有施工缝结构动力响应具体数据不同,但规律相同。加速度最大响应沿拱顶水平向在坝中拱顶的值最大,向两边的坝肩处,加速度最大响应逐渐减小。沿拱坝垂向加速度最大响应从坝顶到基础,响应均逐渐减小。试验结果可为高拱坝结构动力安全研究提供技术依据。
The dynamic failure characteristics of high arch dam are getting more and more attention. Dynamic characteristics and dynamic response are an important aspect of its research. The dynamic characteristics and dynamic response characteristics of high arch dam are studied by the model test. The dynamic characteristics test compares the basic dynamic characteristics of the intact structure and the transverse joint structure with construction. It shows that the fundamental frequency of the structure decreases when the structure has the transverse joint. , Damping increases. The dynamic response of the structure is simulated by seismic shaking table. The experimental results show that the specific data of the dynamic response of the complete structure and the construction joint are different, but the laws are the same. The maximum response of the acceleration along the vault horizontal vault in the dam maximum value to the dam abutment on both sides, the maximum acceleration of the response decreases. The response of vertical acceleration along the arch dam from dam crest to foundation, the response decreases gradually. The test results can provide the technical basis for the research on the dynamic safety of high arch dam structures.