【摘要】 库-坝的耦合振动研究一直是大坝抗震分析的重要内容,也是工程设计的重要依据。采用p型自适应有限元法,建立了三维弹粘塑性模型,提出了适合p型有限单元法的误差估计方法,实现了动力响应分析的自适应升阶过程。计算结果表明:p型有限元法不仅前处理少,而且具有计算精度高和收敛速度快的优点,对求解库水-坝体的耦合振动问题是可行的和高效的;考虑耦合作用后,结构的安全系数将有所降低。更多还原

【Abstract】 Reservoir-dam coupling vibration research, especially elasto-viscoplastic behavior research is a major content of dam earthquake-resistance analysis and is very important to engineering design. A 3D elasto-viscoplastic dynamic analysis model is built for reservoir-dam coupling system by using p-version adaptive FEM. An error estimating method is put forward for the p-version FEM, by which an adaptive process of dynamic response is implemented. The computation result shows that the p-version adaptive FEM is efficient and quick-convergence with less preprocessing. This method is feasible and reliable for solving reservoir-dam coupling vibration problems. The safety coefficient will be reduced after considering coupling behaviors between reservoir and dam.更多还原