| 卢占国,周清勇,刘 智.不同地震波荷载作用下重力坝破坏模型差异研究[J].江西水利科技,2020,(3): |
| 不同地震波荷载作用下重力坝破坏模型差异研究 |
| Research on different failure models of gravity dams under different seismic loads |
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| DOI： |
| 中文关键词: 重力坝 地震随机性 破坏模式 动力响应 抗震分析 |
| 英文关键词: Gravity dam Earthquake randomness Failure mode Dynamic response Seismic analysis |
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| 中文摘要: |
| 随机性是地震荷载重要的特征因素之一，在抗震设计中不容忽视.本文选取金安桥重力坝作为研究对象，对大坝处于不同地震波荷载作用下的破坏模式差异展开研究，探讨不同类型地震荷载作用下重力坝的失效特征及动力响应，可以为重力坝抗震设计提供依据.研究结果显示，不同地震波荷载作用下重力坝的破坏模式存在明显差异，大坝位移变化幅值、损伤演化速度与输入的地震动荷载参数关系紧密.因此受地震荷载随机性影响，结构潜在的易损区域并不能仅通过某条单一地震波分析确定，需加强地震荷载频谱特性与结构动力响应相关性的研究. |
| 英文摘要: |
| Randomness is one of the important characteristic factors of seismic load，which can not be ignored in seismic design.In this paper，Jin'anqiao gravity dam is selected as the research object to study the different failure modes of the dam under different seismic wave loads，the failure characteristics and dynamic response of gravity dams under different types of seismic loads are discussed，which can provide basis for seismic design of gravity dams.The results show that the failure modes of gravity dams under different seismic wave loads are obviously different，the amplitude of dam displacement and the speed of damage evolution are closely related to the input seismic load parameters.Therefore，affected by the randomness of seismic load，the potential vulnerable area of the structure can not be determined only by a single seismic wave analysis，and the research on the correlation between the frequency spectrum characteristics of seismic load and the dynamic response of the structure needs to be strengthened. |
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