单一试件确定岩石动态抗压强度的方法

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (4) : 123-127.

论文

单一试件确定岩石动态抗压强度的方法

杨仁树1,2；陈骏1；肖成龙1；陈帅志1

作者信息 +

A Method to Calculate the Dynamic Compressive Strength of Rock with Single Specimen

YANG Renshu1,2，CHEN Jun1, XIAO Chenglong1，CHEN Shuaizhi1

Author information +

文章历史 +

摘要

通过从破裂形态、能量吸收和力学参数这三个方面对岩石在中、低应变率下的动态破坏机理的分析，提出了一种快速计算岩石动态抗压强度的方法。采用拟静力法结合虚功原理建立关系式，认为外力对岩石所作的功超过了岩石发生的内部能量损耗，岩石无法承受该外荷载而发生破坏。因此动态抗压强度σcd等于静态抗压强度σc与应变率效应导致的强度提高值之和。最后将动态抗压强度计算值与已有文献的实验解进行对比，吻合度良好。

Abstract

The dynamic failure mechanism of rock in intermediate and low strain-rate is analyzed from three aspects --- failure modes, energy absorption and mechanical parameters, A new method to calculate the dynamic compressive strength of rock is presented. Pseudo-static method combined with principle of virtual work is used to build the formula, as we consider that the work done by external force to rock is more than the internal energy loss, and the damage happened because of the rock cannot endure the external load. Therefore the dynamic compressive strength σcd is equal to the static compressive strength σc’ plus the increased strength which is caused by strain-rate effect. Then the calculated value of dynamic compressive strength is compared with the experimental results in other literatures, which the two values are similar.

导出引用

杨仁树1,2；陈骏1；肖成龙1；陈帅志1. 单一试件确定岩石动态抗压强度的方法[J]. 振动与冲击, 2018, 37(4): 123-127

YANG Renshu1,2，CHEN Jun1, XIAO Chenglong1，CHEN Shuaizhi1. A Method to Calculate the Dynamic Compressive Strength of Rock with Single Specimen[J]. Journal of Vibration and Shock, 2018, 37(4): 123-127

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