摘要
参照杭州天子岭填埋场城市固体废弃物(MSW)主要成分,人工配制固体废弃物试样,利用中型动三轴试验仪研究其在较大应变范围内MSW的动力特性。由于MSW的高压缩性,初始孔隙比不同对试样的动力特性影响不大。建议了归一化动剪切模量和阻尼比与动剪应变依赖关系的取值范围和平均值曲线,并将其与不同塑性指数黏土的动力特性进行对比,可以发现MSW材料剪切模量衰减和阻尼比曲线较好的呈现出中塑性黏土的特征。最后,对城市固体废弃物的动剪切模量Gd和阻尼比D随动剪应变dγ的变化曲线进行了拟合,并给出了拟合公式的参数取值。
To investigate the dynamic properties of municipal solid waste （MSW） under large strains, dynamic triaxial tests are conducted by using a moderate-scale triaxial apparatus on MSW samples simulating the compositions of MSW from the Hangzhou Tianziling Landfill. The high compressive property of MSW makes the influence of the initial void ratio insignificant. The variation ranges and average curves of the normalized dynamic shear modulus and the damping ratio versus the dynamic shear strain relationship are proposed and the fitting parameters obtained, which are then compared with those of clays of varying plasticity. It is found that the dynamic properties of MSW are similar to those of clays of medium plasticity.
出处
《土木工程学报》
EI
CSCD
北大核心
2006年第5期90-95,共6页
China Civil Engineering Journal
基金
国家杰出青年科学基金(50425825)
大连理工大学海岸和近海工程国家重点试验室主任基金(LP0205)
关键词
城市固体废弃物
动三轴试验
动剪切模量
阻尼比
municipal solid waste
dynamic tfiaxial apparatus
dynamic shear modulus
damping ratio
