摘要
采用多功能静动三轴仪开展了筑坝反滤料的动剪切模量和阻尼比试验,并对其影响因素进行了试验对比分析,建议了一个综合反应固结应力比、孔隙比和试验级配特征的最大动剪切模量计算公式。试验和分析结果表明,固结应力比对最大动剪切模量的影响可采用幂函数来进行拟合,孔隙比的影响可采用指数函数来进行拟合,试验级配的影响可通过不均匀系数Cu和曲率系数Cc的线性函数来表达。各种影响因素对阻尼比均有影响,但各种情况下的阻尼比试验结果都在一个很小的范围内,可采用平均值计算。
Tests of dynamic shear modulus and damping ratio of dam inverted filler are carded out by multi-function triaxial apparatus; and testing contrast analysis is made of the influencing factors. A comprehensive formula, which takes into consideration the consolidation stress ratio, void ratio and test grading curve, and can be used to calculate the maximum dynamic shear modulus, is proposed. The test and analysis results show that the influence of consolidation stress ratio can be fitted by power function, that of void ratio can be fitted by exponential function, and that of test grading curve can also be fitted by linear function with nonuniform coefficient Cu and curvature coefficient Co. All kinds of influences affect the damping ratio. But the test results are in a narrow range, which means an average value can be used to calculate the damping ratio under different influences.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2010年第7期2030-2034,2039,共6页
Rock and Soil Mechanics
基金
国家自然科学基金(No.50825901No.50639050)
水利部公益性行业专项(No.200801014)
关键词
反滤料
固结应力比
孔隙比
试验级配
inverted filler
consolidation stress ratio
void ratio
test grading curve
