【摘要】 提出一种在强震作用下重力坝考虑地基辐射阻尼效应的动力反应的简单模型,该模型在无质量地基模型的坝体-地基交接面设置黏性阻尼器,并通过大量的计算统计确定阻尼器的系数。计算了100m级和200m级重力坝在不同频谱地震、不同地基弹性模量条件下的地震响应,结果表明,简单模型和弹簧-阻尼边界模型结果接近,误差在8%内。更多还原

【Abstract】 A simple model considering radiation damping is presented to analyze seismic response of gravity dams.Viscous dampers are installed on the dam-foundation interface in the massless foundation model and the damper coefficients are determined by statistical calculations with various parameters.The effects of different spectral earthquakes,different dam heights and variable ratio of the modulus of elasticity between the foundation and the dam concrete are considered.The results show that the dam response,including displacements and stresses,using the simple model have sufficient accuracy compared with that obtained from the viscous-spring boundary model.更多还原