| 王刚,马震岳,张运良.考虑纵缝影响的重力坝静动力荷载组合作用分析[J].水利学报,2009,40(2): |
| 考虑纵缝影响的重力坝静动力荷载组合作用分析 |
| Analysis on combined action of dynamic and static loads of gravity dams in consideration of the effect of longitudinal joints |
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| DOI： |
| 中文关键词: 静动力荷载组合作用 显式动力有限元 重力坝 纵缝 黏弹性动力人工边界 |
| 英文关键词: combined action dynamic loading static loading explicit time integration dynamic FEM gravity dam longitudinal joint visco spring dynamic artificial boundary |
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| 摘要点击次数: 3235 |
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| 中文摘要: |
| 将时间显式积分动力有限元方法与黏弹性动力人工边界理论相结合，建立了有纵缝混凝土重力坝坝体-地基系统的非线性动力反应计算分析方法。同时，采用动力学方法求解静力作用效应，解决了含接触非线性问题的重力坝坝体静、动力荷载组合作用效应的计算问题。文中采用该方法分析了某混凝土重力坝的纵缝对坝体静、动力力学特性的影响程度，明确了纵缝的存在是影响坝体抗震安全性的不利因素，从而也验证了方法的可行性和有效性。 |
| 英文摘要: |
| The explicit time integration dynamic FEM was combined with visco spring dynamic artificial boundaries to solve the nonlinear dynamic responses of concrete gravity dam and rock foundation system.The dynamic contact model was utilized to simulate the effect of longitudinal joints in dams，and the response of dynamic loads was calculated by dynamic method.As a result the combined action of dynamic and static loads was calculated reasonably and easily.The proposed method was applied to analyze the influence of longitudinal joints on static and dynamic characteristics in a concrete gravity dam.The result demonstrates that the existence of longitudinal joints is a disadvantageous factor affecting the aseismic safety of the dam. |
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