高温后砂岩单轴压缩加载速率效应的试验研究

doi:10.11779/CJGE201406011

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1389 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要温度是影响岩石材料物理力学性质的重要因素,为考察温度对砂岩加载速率效应的影响规律,对25℃～800℃之间6种温度水平后的砂岩试样分别进行不同加载速率下的单轴压缩试验。试验结果表明：① 高温后砂岩的物理性质出现一定的劣化,由25℃升高至800℃,密度和纵波波速分别减小了5.89%和73.72%；② 随着温度的升高,砂岩峰值强度和弹性模量逐渐减小,峰值应变逐渐增大,而峰值强度随温度的变化过程受加载速率的影响较大；③ 高温后砂岩的峰值强度和峰值应变具有明显的加载速率效应,且服从正线性关系,相关性参数A表征了材料受加载速率影响的显著程度,随着温度的升高参数A呈现先减小后又增大的趋势；④随着温度和加载速率的增大,砂岩破坏形态由拉剪混合破坏逐步转化为单一斜剪破坏,破坏程度愈渐剧烈,分形维数也逐渐增大。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	苏海健
	靖洪文
	赵洪辉

关键词 ：高温, 砂岩, 加载速率, 破坏形态, 分形维数

Abstract：The temperature is a very important factor affecting the physical and mechanical properties of rock. Uniaxial compression tests on sandstone after high temperature with six temperature levels between 25℃ to 800℃ under different loading rates are conducted to investigate the influence of temperature on loading rate effect. The results show that the physical properties of sandstone after high temperature appear to have a certain degradation, and that the density and longitudinal wave velocity respectively decrease by 5.89% and 73.72% with temperature rising from 25℃ to 800℃. With the increase of the temperature, the peak strength and elastic modulus decrease little by little, but the peak strain increases gradually, and the evolutionary process of the peak strength along with the temperature is strongly influenced by the loading rate. The peak strength and peak strain of sandstone after high temperature have an obvious loading rate effect, and they obey the positive linear relationship. The correlation parameter A characterizes the impact degree by loading rate, and with the increase of temperature, parameter A first decreases and then increases. The failure mode of sandstone transforms from mixing failure of tensile and shear gradually into a single shear failure with the increase of the temperature and loading rate, the damage degree becomes increasingly more serious, and the fractal dimension also increases gradually.

Key words： high temperature sandstone loading rate failure mode fractal dimension

收稿日期: 2013-11-18

TU452

基金资助:国家重点基础研究发展计划（973计划）项目（2013CB036003）; 国家自然科学基金项目（51374198）; 江苏省普通高校研究生科研创新计划项目（CXZZ13_0935）

作者简介: 苏海健(1988- ),男,江苏启东人,博士研究生,主要从事岩石力学与工程等方面的研究。E-mail: 631441969@qq.com。

引用本文:

苏海健, 靖洪文, 赵洪辉. 高温后砂岩单轴压缩加载速率效应的试验研究[J]. 岩土工程学报, 2014, 36(6): 1064-1071. SU Hai-jian, JING Hong-wen, ZHAO Hong-hui. Experimental investigation on loading rate effect of sandstone after high temperature under uniaxial compression. Chinese J. Geot. Eng., 2014, 36(6): 1064-1071.

链接本文:

http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/10.11779/CJGE201406011 或 http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/Y2014/V36/I6/1064

[1] KILIC O. The in?uence of high temperatures on limestone P-wave velocity and Schmidt hammer strength[J]. International Journal of Rock Mechanics and Mining Science, 2006, 43(6): 980-986.
[2] 吴刚, 邢爱国, 张磊. 砂岩高温后的力学特征[J]. 岩石力学与工程学报, 2007, 26(10): 2110-2116. (WU Gang, XING Ai-guo, ZHANG Lei. Mechanical characteristics of sandstone after high temperature[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(10): 2110-2116. (in Chinese))
[3] 吴刚, 王德咏, 翟松韬. 单轴压缩下高温后砂岩的声发射特征[J]. 岩土力学, 2012, 33(11): 3237-3242. (WU Gang, WANG De-yong, ZHAI Song-tao. Acoustic emission characteristics of sandstone after high temperature under uniaxial compression[J]. Rock and Soil Mechanics, 2012, 33(11): 3237-3242. (in Chinese))
[4] MAO Xian-biao, ZHANG Lian-ying, LI Tian-zhen, et al. Properties of failure mode and thermal damage for limestone at high temperature[J]. Mining Science and Technology, 2009, 19(3): 290-294.
[5] 赵金昌, 赵阳升, 李义, 等. 花岗岩高温高压条件下冲击旋转破碎规律研究[J]. 岩土工程学报, 2010, 32(6): 856-860. (ZHAO Jin-chang, ZHAO Yang-sheng, LI Yi, et al. Percussive rotary drilling law of granite under high temperature and high pressure[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(6): 856-860. (in Chinese))
[6] 尹土兵, 李夕兵, 王斌, 等. 高温后砂岩动态压缩条件下力学特性研究[J]. 岩土工程学报, 2010, 32(5): 777-784. (YIN Tu-bing, LI Xi-bing, WANG Bin, et al. Study of mechanical properties of sandstones after high temperature under dynamic loading[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(5): 777-784. (in Chinese))
[7] 孙强, 张志镇, 薛雷, 等. 岩石高温相变与物理力学性质变化[J]. 岩石力学与工程学报, 2013, 32(5): 935-942. (SUN Qiang, ZHANG Zhi-zhen, XUE Lei, et al. Physico-mechanical properties variation of rock with phase transformation under high temperature[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(5): 935-942. (in Chinese))
[8] 吴绵拔, 刘远惠. 中等应变速率对岩石力学特性的影响[J]. 岩土力学, 1980(1): 51-58. (WU Mian-ba, LIU Yuan-hui. The effect of intermediate strain rates on mechanical properties of rock[J]. Rock and Soil Mechanics, 1980(1): 51-58. (in Chinese))
[9] 李永盛. 加载速率对红砂岩力学效应的试验研究[J]. 同济大学学报, 1995, 23(3): 265-269. (LI Yong-sheng. Experimental analysis on the mechanical effects of loading rates on red sandstone[J]. Journal of Tongji University, 1995, 23(3): 265-269. (in Chinese))
[10] 杨仕教, 曾晟, 王和龙. 加载速率对石灰岩力学效应的试验研究[J]. 岩土工程学报, 2005, 27(7): 786-788. (YANG Shi-jiao, ZENG Sheng, WANG He-long. Experimental analysis of mechanical effects of loading rates on limestone[J]. Chinese Journal of Geotechnical Engineering, 2005, 27(7): 786-788. (in Chinese))
[11] 廖红建, 蒲武川, 殷建华. 软岩的应变速率效应研究[J]. 岩石力学与工程学报, 2005, 24(18): 3218-3223. (LIAO Hong-jian, PU Wu-chuan, YIN Jian-hua. Study of strain rate effect of soft rock[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(18): 3218-3223. (in Chinese))
[12] 纪文栋, 杨春和, 姚院峰, 等. 应变加载速率对盐岩力学性能的影响[J]. 岩石力学与工程学报, 2011, 30(12): 2507-2513. (JI Wen-dong, YANG Chun-he, YAO Yuan-feng, et al. Effects of loading strain rate on mechanical performances of salt rock[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(12): 2507-2513. (in Chinese))
[13] 尹小涛, 葛修润, 李春光, 等. 加载速率对岩石材料力学行为的影响[J]. 岩石力学与工程学报, 2010, 29(增刊1): 2610-2615. (YIN Xiao-tao, GE Xiu-run, LI Chun-guang, et al. Influences of loading rates on mechanical behaviors of rock materials[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(S1): 2610-2615. (in Chinese))
[14] 苏承东, 李怀珍, 张盛, 等. 应变速率对大理岩力学特性影响的试验研究[J]. 岩石力学与工程学报, 2013, 32(5): 943-950. (SU Cheng-dong, LI Huai-zhen, ZHANG Sheng, et al. Experimental investigation on effect of strain rate on mechanical characteristics of marble[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(5): 943-950. (in Chinese))
[15] 张连英, 茅献彪. 高温状态下加载速率对石灰岩力学效应研究[J]. 岩土力学, 2010, 31(11): 3511-3515. (ZHANG Lian-ying, MAO Xian-biao. Experimental study of the mechanical effects of loading rates on limestone at high temperature[J]. Rock and Soil Mechanics, 2010, 31(11): 3511-3515. (in Chinese))
[16] 高峰, 谢和平, 赵鹏. 岩石块度分布的分形性质及细观结构效应[J]. 岩石力学与工程学报, 1994, 13(3): 240-246. (GAO Feng, XIE He-ping, ZHAO Peng. Fractal properties of size-frequency distribution of rock fragments and the influence of meso-structure[J]. Chinese Journal of Rock Mechanics and Engineering, 1994, 13(3): 240-246. (in Chinese))
[17] 谢和平, 高峰, 周宏伟, 等. 岩石断裂与破碎的分形研究[J]. 防灾减灾工程学报, 2003, 23(4): 1-9. (XIE He-ping, GAO Feng, ZHOU Hong-wei, et al. Fractal fracture and fragmentation in rocks[J]. Journal of Disaster Prevention and Mitigation Engineering, 2003, 23(4): 1-9. (in Chinese))