共振柱仪通常用来测量土在小应变振幅时的剪切模量和阻尼特性,应用这类仪器从共振频率求剪切模量必须精确地知道仪器顶帽质量块的扭转惯量JA值。本文叙述使用二只已知几何尺寸的标定杆,确定共振柱仪JA值的一种新的简单的方法,这种标定方法的优点是可以不必要知晓标定试件的材料性质而测定JA值。共振柱仪尽管种类繁多,但最常用的是一种底座固定在刚性基础,顶帽质量块由正弦激振力驱动作扭转运动。如哈丁(Hordin)型共振柱仪,有 Resonance column instrumentation is commonly used to measure the shear modulus and damping characteristics of soil at small strain amplitudes. Using such instruments to obtain shear modulus from resonant frequencies requires accurate knowledge of the JA value of torsional moment of mass of the instrument’s top cap. This article describes a new and simple method for determining the JA value of a resonance column using two calibration rods of known geometry. The advantage of this calibration method is the determination of the JA value without the need to know the material properties of the calibration specimen. Although a wide variety of resonant column instruments, but the most commonly used is a base fixed on the rigid foundation, the top cap mass driven by sinusoidal excitation force for twisting movement. Such as Hordin type resonance column instrument, there