TESTING STUDY ON MECHANICAL PROPERTIES OF TUFF,GRANITE AND BRECCIA AFTER HIGH TEMPERATURES
TESTING STUDY ON MECHANICAL PROPERTIES OF TUFF,GRANITE AND BRECCIA AFTER HIGH TEMPERATURES
复制标题
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Z. Hehua
中科院分区：
文献类型：
--
作者：
Z. Hehua
通过单轴压缩试验，研究了凝灰岩、花岗岩和角砾岩在不同温度下的力学性质，包括峰值应力、峰值应变和弹性模量随温度的变化，以及纵波速度与峰值应力、峰值应变的关系，温度在20 ℃、200 ℃、400 ℃、600 ℃范围内变化，结果表明，峰值应力和弹性模量均随温度的升高而减小，温度越高，峰值应力和弹性模量的减小幅度越大;凝灰岩和花岗岩的峰值应变随温度的升高而增大，而角砾岩的峰值应变随温度的升高而减小;此外，还研究了纵波速度、纵波速度和弹性模量之间的关系。峰值应力和峰值应变随岩石类型的不同而呈现不同的规律。
Based on the uniaxial compression test,the mechanical properties of tuff,granite and breccia after different high temperatures are studied.The scope of this research includes(1) the variation of peak stress,peak strain and elastic modulus with temperature,and(2) the relationship between longitudinal wave velocity and peak stress and peak strain.The temperature varies in the range of 20 ℃,200 ℃,400 ℃,600 ℃,800 ℃,and the heating velocity is 30 ℃/min.The results show that the peak stress and elastic modulus decrease with temperature.The higher the temperature is,the larger the decrement of the peak stress and elastic modulus are.For tuff and granite,the peak strain increases with temperature.However,for breccia,it seems that the peak strain decreases with temperature.Furthermore,the relationship among longitudinal wave velocity,peak stress and peak strain present different laws according to the types of rocks.