| 杨正权,刘小生,刘启旺,汪小刚.两河口高土石坝动力特性振动台模型试验研究[J].水利学报,2011,42(10): |
| 两河口高土石坝动力特性振动台模型试验研究 |
| Study on shaking table model tests for dynamic characteristic analysis of the Lianghekou High Rock-Fill Dam |
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| DOI： |
| 中文关键词: 高土石坝 振动台模型试验 动力特性 自振频率 阻尼比 抗震设计 |
| 英文关键词: high rock-fill dam shaking table model test dynamic characteristics natural frequency of vibration damping ratio seismic design |
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| 中文摘要: |
| 土石坝坝体自身的动力特性，是土石坝在地震动作用下动力响应性状的重要影响因素。本文通过大型振动台模型试验，研究了两河口高土石坝缩尺模型坝的动力特性及其相关影响规律，并根据相似率，用模型坝的动力特性参数推算出原型高土石坝的相应动力特性参数。试验研究表明：在特定的地震动作用下，大坝结构的振型基本稳定；坝体的自振频率、阻尼比和振型系数等动力特性参数受振动强度、振动历史和水库是否蓄水等因素影响。 |
| 英文摘要: |
| Dynamic response characteristics of high rock-fill dams subjected to earthquake are greatly affected by their own dynamic characteristics. In this study，firstly，the dynamic characteristics and coherent regularity of the model for Lianghekou dam with height 295m，were obtained through shaking table model tests，and then the corresponding dynamic characteristics of prototype high rock-fill dam were obtained by the test results according to the similarity rules. The main conclusions include：basically the dam has a stable vibration mode under special seismic vibration； dynamic characteristics of the dam are affected by many factors，such as the vibration intensity，vibration history，reservoir impounding，and so on. |
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