动三轴试验固结时间对动剪切模量比和阻尼比影响的初步分析

Effect of Consolidation Time on Dynamic Shear Modulus Ratio and Damping Ratio in Dynamic Triaxial Test

动三轴试验是将试样在轴对称的三轴应力下进行固结,在不排水条件下进行的振动试验,同时可测定土样的动剪切模量比和阻尼比。土的动剪切模量比和阻尼比是土动力学特性的2个重要参数,在工程场地地震安全性评价工作和土层地震反应分析中不可缺少。为了减少工期,提高工效,及时而又准确地提交报告,我们结合自己多年的土工试验经验,对可塑状态以上的粘性土试样进行了缩短固结时间的对比试验,并得到理想的试验结果。

Dynamic triaxial test is a vibration test,in which,the sample is consolidated by axisymmetric triaxial stress in the undrained condition.Through the test,dynamic shear modulus ratio and the damping ratio of soil samples can be determined.Dynamic shear modulus ratio and damping ratio of soil samples are two important parameters in soil dynamics characters and indispensible for seismic safety evaluation and seismic response analysis of the soil layer in engineering sites.In order to reduce time limit,improve work effiency and submit report timely and accurately,according to our years of experience in soil test,we conduct a comparison test on cohesive soil that reaches above plastic condition and achieve perfect test results.