【摘要】 目前高土石坝抗震设计一般要进行坝体动力敏感性分析,但分析方法还没有共识。为此,以典型200m心墙堆石坝为例,进行了土石坝动力敏感性分析,分析结果表明,坝料动力特性取模量比衰减的上限曲线和阻尼比增长的下限曲线进行组合,坝体的动力反应和地震永久变形均最大,建议作为坝体抗震设计的控制工况。更多还原

【Abstract】 The sensitivity analyses of seismic response are widely used for aseismic design of high earth-rock dams,but there are different analytical methods.Taking a 200-meter-high core rockfill dam as example,the sensitive analyses are implemented for the seismic response of the dam.The results show that,when the dynamic parameters of dam material is selected by the combination of the upper bound curve of dynamic shear modulus ratio attenuation and lower bound curve of damping ratio,the acceleration and permanent deformation of dam are all largest.So,the combination of dam material dynamic parameters should be as the controlling condition of seismic design.更多还原