论文部分内容阅读
共振柱试验是测试土动力变形特性的一种室内试验,用实心的或空心的圆柱试样,在三轴仪压力室的压力下施加不同频率的竖向或扭转的稳态激震力,测定其一阶共振频率,根据试样的共振频率,几何形状和两端的约束条件,计算出压缩波或剪切波的波速,再按弹性波速度与介质模量和密度的关系,推算出试样的动弹性模量E或动剪切模量G,共振柱试验的应变范围是从10~(-6)至10~(-3),不能用于确定大应变时的动弹性模量或剪切模量,也不能用于测定砂土的液化剪应力,在大应变的情况下必须用周期加荷的三轴试验或单剪试验。共振柱试验由于应变的幅值小,安装一次试样可以在几种不同的固
Resonance column test is an indoor test to test the dynamic deformation characteristics of soils. With solid or hollow cylindrical samples, vertical or torsional steady-state shock forces of different frequencies are applied under the pressure of a triaxial apparatus pressure chamber. In the first-order resonance frequency, the wave velocity of the compression wave or shear wave is calculated based on the resonance frequency, geometry of the sample, and the constraints at both ends. The relationship between the elastic wave velocity and the modulus and density of the medium is used to calculate the sample’s The dynamic elastic modulus E or the dynamic shear modulus G, the strain range of the resonance column test is from 10~(-6) to 10~(-3), and cannot be used to determine the dynamic elastic modulus or shear at large strain. Modulus cannot be used to determine the liquefaction shear stress of sand. In the case of large strains, it is necessary to use cyclically loaded triaxial tests or single shear tests. Resonance column test due to the small amplitude of the strain, the installation of a sample can be in several different solid