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中文摘要：
采用电液伺服材料力学试验系统对常温-800℃高温作用下大理岩的力学性能进行了研究，考察了大理岩的全应力-应变曲线、峰值应力σp、峰值应变εp、弹性模量E等量的变化特征。结果表明：随受热温度升高大理岩的峰值应力和弹性模量不同程度上渐次降低，尤其是在不同温度段岩石强度降低具有突变性，而峰值应变不同程度渐次增长。800℃时大理岩的延性明显增强，应力达到峰值后，应变仍表现出缓慢增加特性，但最终大理岩破坏方式仍以脆断为主。研究结果一定程度上反映了大理岩在温度作用下内部结构变化的特征，可为相关岩体工程设计与研究提供参考。
英文摘要：
The mechanical properties of marble were studied using the MTS810 Rock Mechanics servocontrolled testing system at temperatures up to 800℃. This was done to analyze the stress-strain curve, peak stress, peak strain, and modulus of elasticity of marble. The results show that the peak stress and elastic modulus decrease with increasing temperatures, and the rock mechanical strength decreases suddenly in certain temperature ranges while the peak strain increases stepwise as the temperature rises. Marble ductility increased greatly at 800℃. The strain increases slowly as temperature rises after the peak stress occurs, but brittle fracturing is the main destructive manner of marble. The results also reflect the fundamental regulation of interior structural change in sandstone at different temperatures, providing a reference for rock engineering design.
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