1.Department of Airfield and Building Engineering，Air Force Engineering University，Xi’an 710038，China；
2.College of Mechanics and Civil Architecture，Northwest Polytechnic University，Xi’an 710072，China
摘要基于电液伺服压力试验机和φ100 mm SHPB试验平台，分别对四种饱水度红砂岩试样进行静态压缩试验和六种应变率的动态冲击试验；借鉴宏观唯象损伤力学概念及Lemairte损伤模型，依据不同饱水度红砂岩静态压缩试验结果，拟合得到分段式水软化-应变损伤本构关系，最后利用所得本构关系，对静态压缩试验结果进行合理分析；SHPB冲击试验结果表明：（1）各饱水度红砂岩均呈现出明显的应变率效应，峰值应力、峰值应变及峰值模量均随着应变率的增大而增大；（2）在水-岩-力的响应体系中，既存在水对岩石的软化作用，同时又存在应变率、孔隙水以及岩石结构之间的动力耦合强化作用，这两种作用始终存在，但随着应变率的变化，两种作用的效能发挥有所浮动，进而影响红砂岩所呈现出的性能。
Based on the electro-hydraulic servo pressure tester and 100 mm SHPB test platform, four kinds of saturated red sandstone samples were subjected to static compression test and six kinds of strain rate dynamic impact test.Drawing on the concept of macroscopic phenomenological damage mechanics and Lemairte’s damage model, the constitutive relation of water softening-strain damage was obtained according to the static compression test results of different saturated water.Finally, the results of static compression test were analyzed by using the constitutive relation.SHPB impact test results show that: ①The saturated sandstone shows a significant strain rate effect.The peak stress, peak strain and peak modulus increase with strain rate.②In the water-rock-force response system, there is a softening effect of water on the rock, and there is coupling reinforcement between the strain rate, the pore water and the rock structure.Both of these effects are always present, but with the change of the strain rate, the effect of the two effects is floating, which in turn affects the performance of the red sandstone.
郑广辉1，许金余1,2，王鹏1，方新宇1，王佩玺1，闻名1. 不同饱水度红砂岩静态本构关系及动态力学性能研究[J]. 振动与冲击, 2018, 37(16): 31-37.
ZHENG Guanghui1，XU Jinyu1,2，WANG Peng1，FANG Xinyu1，WANG Peixi1，WEN Ming1. Static constitutive relation and dynamic mechanical properties of red sandstone with different water saturation. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(16): 31-37.
[1] 吴 勇，李乾坤，赵宝生，等. 不同含水率下白云岩损伤本构关系研究[J]. 矿冶，2014, 23(1): 1-4.
WU Yong, LI Qian-kun, ZHAO Bao-sheng, et al. Damage constitutive relation research on dolomite Under different water absorption condition[J]. Mining ＆ metallurgy, 2014, 23(1): 1-4.
[2] 刘新荣，傅 晏，王永新，等. （库）水–岩作用下砂岩抗剪强度劣化规律的试验研究[J]. 岩土工程学报，2008, 30(9): 1298-1302.
LIU Xin-rong, FU Yan, WANG Yong-xin, et al. Deterioration rules of shear strength of sand rock under water-rock interaction of reservoir[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(9): 1298-1302.
[3] 刘小军，刘新荣，王铁行，等. 考虑含水劣化效应的浅变质板岩蠕变本构模型研究[J]. 岩石力学与工程学报，2014, 33(12): 2384-2389.
LIU Xiao-jun,LIU Xin-rong,WANG Tie-hang, et al. Creep model of low-grade metamorphic slate considering moisture degradation effect[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(12): 2384-2389.
[4] 王运生，吴俊峰，魏 鹏. 四川盆地红层水岩作用岩石弱化时效性研究[J]. 岩石力学与工程学报，2009, 28(增1)： 3102–3108.
WANG Yun-sheng, WU Jun-feng, WEI Peng. Research on time effect of rock weakening by water-rock interaction of redbeds in Sichuan basin[J]. Chinese Journal of Rock Mechanics and Engineering，2009, 28(Supp.1): 3102–3108.
[5] 周翠英，邓毅梅，谭祥韶，等. 饱水软岩力学性质软化的试验研究与应用[J]. 岩石力学与工程学报，2005, 24(1): 33–38.
ZHOU Cui-ying, DENG Yi-mei, TAN Xiang-shao, et al. Experimental research on the softening of mechanical properties of saturated soft rocks and application[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(1): 33–38.
[6] ZHENG D，LI Q B. An explanation for rate effect of concrete strength based on fracture toughness including free water viscosity[J]. Engineering Fracture Mechanics，2004, 71(16/17): 2319–2327.
[7] 王海龙，李庆斌. 饱和混凝土静动力抗压强度变化的细观力学机制[J]. 水利学报，2006, 37(8): 958–962.
WANG Hai-long, LI Qing-bin. Micro-mechanism of static and dynamic strengths for saturated concrete[J]. Journal of Hydraulic Engineering，2006, 37(8): 958-962.
[8] 田象燕，高尔根，白石羽. 饱和岩石的应变率效应和各向异性的机理探讨[J]. 岩石力学与工程学报, 2003, 22(11)：1789-1792.
TIAN Xiang-yan, GAO Er-gen, BAI Shi-yu. Discussion About Mechanism Of Strain-Rate Effect And Anisotropy Of Saturated Rocks[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(11): 1789-1792.
[9] 王 斌，李夕兵，尹土兵，等. 饱水砂岩动态强度的SHPB试验研究[J]. 岩石力学与工程学报,2010,(05):1003-1009.
WANG bin, Li xi-bing, YIN shi-bing, et al. Split hopkinson pressure bar(shpb) experiments on dynamic strength of water-saturated sandstone[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, (05): 1003-1009.
[10] GB/T 50266—2013 工程岩体试验方法标准[S]. GB/T 50266-2013 Standard for test method of engineering rock mass[S].
[11] 洪 亮，李夕兵，马春德，等. 岩石动态强度及其应变率灵敏性的尺寸效应研究[J]. 岩石力学与工程学报，2008, 27(3): 526-533.
HONG Liang, LI Xi-bing, MA Chun-de, et al. Study on size effect of rock dynamic strength and strain rate sensitivity[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(3): 526-533.
[12] 邓华锋，李建林，邓成进，等. 岩石力学试验中试样选择和抗压强度预测方法研究[J]. 岩土力学，2011, 32(11)： 3399-3403.
DENG Hua-feng, LI Jian-lin, DENG Cheng-jin, et al. Analysis of sampling in rock mechanics test and compressive strength prediction methods[J]. Rock and Soil Mechanics，2011, 32(11)： 3399–3403.
[13] 刘佑荣，唐辉明. 岩体力学[M]. 北京：化学工业出版社，2008.
LIU You-rong, TANG Hui-ming, YANTI LIXUE[M]. Beijing：Chemical Industry Press，2008.
[14] 高 玮，汪 磊，杨大勇. 岩石损伤演化的能量方法研究[J]. 岩石力学与工程学报，2011, 30(2): 4087-4092.
GAO Wei，WANG Lei, YANG Da-yong. Rock damage evolution based on energy principle [J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(2): 4087-4092.
[15] 许金余，吕晓聪，张 军，等. 循环冲击作用下围压对斜长角闪岩动态特性的影响研究[J]. 振动与冲击，2010, 29(8): 60-63.
XU Jin-yu, LU Xiao-cong, ZHANG Jun, et al. Research on dynamic mechanical performance of amphibolite under cyclical impact loadings at different confining pressures[J]. JOURNAL OF V IBRATION AND SHOCK, 2010, 29(8): 60-63.
[16] 李为民，许金余，沈刘军，等. Φ100mm SHPB应力均匀及恒应变率加载试验技术研究[J]. 振动与冲击,2008, (02): 129-132+181-182.
LI Wei-min, XU Jin-yu, SHEN Liu-jun, et al. Fault detection for one class of bearingsbased on arw ith self-correlation kurtosis[J]. JOURNAL OF V IBRATION AND SHOCK, 2008, (02): 129-132+181-182.
