摘要
坝料动力特性是土石坝动力分析的重要参数。大型土石坝工程一般直接进行坝料动三轴试验,确定动力参数;而中小型工程,则大多采用工程类比法确定。本文在对现有的国内外试验数据进行系统整理与分析的基础上,给出了堆石料、心墙料的等效动剪切模量比和等效阻尼比随动剪应变非线性变化的统一数学表达式。这些公式可用于判定坝料动力试验成果的合理性,也可直接用作坝体动力参数敏感性分析及中小型土坝的坝料动参数。
The dynamic characteristics of dam materials are the important factors for the dynamic analysis during the seis- mic design of embankment dam. For determining the dynamic parameters, the dynamic triaxial test is generally used for large embankment dams, but the engineering analogy method is often used for small and medium projects. Here based on the analyses of test data at home and abroad, the mathematical expressions of equivalent dynamic shear modulus ratio and dynamic damping ratio with dynamic shear strain are established for rockfill materials and core wall materials. The proposed expressions could be used for judging the reasonableness of dynamic test results, they could also be used for the dynamic sensitivity analysis of embankment dams.
出处
《水利与建筑工程学报》
2011年第6期5-8,28,共5页
Journal of Water Resources and Architectural Engineering
基金
国家自然科学基金项目(50879007
50979014)
高等学校博士点基金(20090041110016)
关键词
土石坝
动模量衰减曲线
阻尼比曲线
统计公式
earth-rock dam
dynamic modulus attenuation curve
damping ratio curve
statistical formula
