高温环境岩石力学性质损伤效应试验研究
发布时间：2019-03-11 07:35
【摘要】：高温环境中,岩石结构的渐变或突变导致岩石力学性质的变化。对经历高温环境的岩石进行轴向压缩试验,结果表明:岩石单轴抗压强度、弹性模量随温度升高呈现负指数规律减小,岩石的软化系数及弹性模量劣化度随温度升高逐渐增大;岩石的抗剪强度参数随温度升高逐渐减小,分析粘聚力、内摩擦角与温度变化规律,可表征为三次多项式变化关系。为定量分析岩石力学性质的热损伤特征,分别求得岩石抗剪强度参数损伤变量,损伤变量值随温度升高而逐渐增大。高温对岩石的力学性质产生明显的损伤,研究成果可以为高温环境岩体失稳预测分析提供依据。
[Abstract]:In high temperature environment, the gradual change or sudden change of rock structure leads to the change of rock mechanical properties. The results show that the uniaxial compressive strength and modulus of elasticity decrease with the increase of temperature, and the softening coefficient and the degree of degradation of elastic modulus increase gradually with the increase of temperature, and the results of axial compression test show that the uniaxial compressive strength and modulus of elasticity of rock decrease with the increase of temperature. The shear strength parameters of rock decrease with the increase of temperature. The relationship between cohesion, internal friction angle and temperature can be expressed as cubic polynomial. In order to quantitatively analyze the thermal damage characteristics of rock mechanical properties, the damage variables of rock shear strength parameters are obtained, and the values of damage variables increase gradually with the increase of temperature. The mechanical properties of rock are obviously damaged by high temperature. The research results can provide the basis for prediction and analysis of rock mass instability in high temperature environment.
【作者单位】： 武昌工学院土木工程学院;碧桂园控投集团;
【分类号】：TD315
本文编号：2438085
[Abstract]:In high temperature environment, the gradual change or sudden change of rock structure leads to the change of rock mechanical properties. The results show that the uniaxial compressive strength and modulus of elasticity decrease with the increase of temperature, and the softening coefficient and the degree of degradation of elastic modulus increase gradually with the increase of temperature, and the results of axial compression test show that the uniaxial compressive strength and modulus of elasticity of rock decrease with the increase of temperature. The shear strength parameters of rock decrease with the increase of temperature. The relationship between cohesion, internal friction angle and temperature can be expressed as cubic polynomial. In order to quantitatively analyze the thermal damage characteristics of rock mechanical properties, the damage variables of rock shear strength parameters are obtained, and the values of damage variables increase gradually with the increase of temperature. The mechanical properties of rock are obviously damaged by high temperature. The research results can provide the basis for prediction and analysis of rock mass instability in high temperature environment.
【作者单位】： 武昌工学院土木工程学院;碧桂园控投集团;
【分类号】：TD315
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