不同方向地震激励对水工隧洞位移的影响

发布时间：2018-06-25 17:25

本文选题：数学模型 + 地震激励　；参考：《水电能源科学》2017年04期

【摘要】：目前在研究水工隧洞地震响应时只考虑了单向地震激励,忽略了双向地震激励,故不能合理地分析不同方向地震激励对水工隧洞位移的影响。因此,选取合理的材料参数和模型边界条件,应用ANSYS建立了某水工隧洞的三维有限元模型,对单向地震激励和双向地震激励下的水工隧洞进行了位移分析。结果表明,不同方向的地震激励对水工隧洞的水平位移和竖直位移影响不同,水平位移主要受x方向地震激励影响,竖直位移主要受y方向地震激励影响,并根据单向地震激励和双向地震激励存在的相关性,建立了位移数学关系模型。
[Abstract]:At present, in studying the seismic response of hydraulic tunnel, only unidirectional seismic excitation is considered, and the bidirectional seismic excitation is neglected. Therefore, the influence of seismic excitation in different directions on the displacement of hydraulic tunnel cannot be reasonably analyzed. Therefore, the 3D finite element model of a hydraulic tunnel is established by selecting reasonable material parameters and model boundary conditions, and the displacement of hydraulic tunnel under unidirectional and bidirectional earthquake excitation is analyzed. The results show that the horizontal displacement and vertical displacement of hydraulic tunnel are affected by the earthquake excitation in different directions. The horizontal displacement is mainly affected by the earthquake excitation in the x direction, and the vertical displacement is mainly affected by the earthquake excitation in the y direction. According to the correlation between unidirectional and bidirectional seismic excitation, a mathematical model of displacement is established.
【作者单位】：郑州大学水利与环境学院;郑州市水利建筑勘测设计院;
【分类号】：TV672.1;TV312

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