【摘要】 阻尼模型对土石坝动力计算结果有着很重要的影响,各种响应都是阻尼的函数,能否正确估计阻尼,直接影响到结构动力分析结果的可靠性。目前在工程实际应用中,阻尼系数大多只考虑土石坝的自振特性。通过分析表明,地震波频率特性对土石坝地震响应有着重要的影响,尤其对高土石坝影响更大。通过探讨几种考虑地震动频率特性的现有的阻尼模型,为土石坝动力计算中阻尼模型的选取提出建议。更多还原

【Abstract】 The selection of damping models has great influence to the dynamic analysis of earth-rock dams.All the responses of dams are the function of damping,so damping estimation would directly affect the reliability of dynamic analysis results.At present,only the free vibration characteristic of earth-rock dams is considered in the calculation of damping coefficient in engineerings.Analysis shows that the frequency characteristic of earthquake wave would have great influence on the earthquake response of earth-rock dams,especially on high ones.Finally several damping models considering the frequency characteristic of earthquake wave are discussed,giving suggestions to the selection of damping models in the dynamic analysis of earth-rock dams.更多还原