不同倾角裂隙混凝土试件动态力学破坏特性试验研究

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摘要为了探讨含不同倾角裂隙的混凝土试件在冲击荷载作用下的力学特性及破坏规律，采用分离式霍普金森压杆（Split Hopkinson Pressure Bar，SHPB）对含有5种不同倾角裂隙的混凝土试件进行了冲击试验，借助高速摄像系统实时捕捉了裂纹扩展和动态破坏过程。结果表明：倾角为30°的裂隙试件的反射波波幅相对最大，倾角为0°的裂隙试件的反射波波幅相对较小。当预制裂隙倾角为0°时，冲击波耗散较少，透射波波幅较大；当预制裂隙倾角为60°时，冲击波耗散较多，即当应力波传播方向与预制裂隙夹角为60°时试件最容易发生破坏。冲击荷载下新形成的裂纹整体上均沿着预制裂隙尖端起裂、扩展和贯通，破坏模式主要为压应力作用下的张拉破坏；在相同预制裂隙宽度下，长度为20mm预制裂隙的破坏形式比10mm长度预制裂隙试件更加简单，形成新裂纹的数量相对较少，且更容易沿预制裂纹尖端方向向外起裂；巴西圆盘试件在冲击荷载的破坏形式与预制裂隙长度密切相关，与裂隙宽度关联性较弱。

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	武旭1
	方慧1
	潘继良2
	席迅2
	孙景来2
	张英才3

关键词 ：预制裂隙, 冲击试验, 裂隙扩展, 破裂模式, 分离式霍普金森压杆

Abstract：In order to investigate the mechanical properties and failure law of concrete specimens with cracks of different inclination angles under impact load, the Split Hopkinson Pressure Bar(SHPB) was used to test on concrete specimens, and the high-speed camera system was used to capture the crack growth and dynamic failure process in real time. The results show that the reflected wave amplitude of the crack specimens with 30° is relatively the largest, while the reflected wave amplitude of the crack specimens with 0° is relatively small. When the angle of the crack is 0°, the shock wave dissipation is less, and the transmitted wave amplitude is larger. When the angle of the prefabricated crack is 60°, the shock wave dissipates more, that is, when the angle between the stress wave propagation direction and the prefabricated crack is 60°, the specimen is most likely to failure. The newly formed cracks under impact load initiate, propagate and coalesce along the precast crack tip on the whole, and the failure mode is mainly tensile failure under compressive stress. Under the same width of the prefabricated crack, the failure mode of the prefabricated crack with a length of 20mm is simpler than that of the prefabricated crack with a length of 10mm. The number of new cracks is relatively small, and it is easier to crack outwards along the direction of the prefabricated crack tip. The failure modes of Brazilian disc specimens under impact load are closely related to the length of prefabricated cracks, but weakly related to the width of cracks.

Key words： prefabricated crack impact test crack propagation failure mode SHPB

收稿日期: 2022-11-28 出版日期: 2024-02-28

引用本文:

武旭1，方慧1，潘继良2，席迅2，孙景来2，张英才3. 不同倾角裂隙混凝土试件动态力学破坏特性试验研究[J]. 振动与冲击, 2024, 43(4): 142-149.
WU Xu1,FANG Hui1,PAN Jiliang2,XI Xun2,SUN Jinglai1,ZHANG Yingcai3. Experimental study on dynamic mechanical failure characteristics of concrete specimens with cracks of different angles. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(4): 142-149.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2024/V43/I4/142

[1] 秦银刚，黄海峰. 地铁列车振动对盾构隧道结构影响试验研究[J]. 公路工程，2021, 46(06):8-14. QIN Yingang, HUANG Haifeng. Vibration measurement of shield tunnel induced by subway trains[J]. Highway Engineering, 2021,46(06):8-14. [2] 陈文化，包汉营. 隧道衬砌–土层接触面黏–弹性对地铁空间振动传播的影响[J]. 岩石力学与工程学报，2019, 38(S2):3460-3468. CHEN Wenhua, BAO Hanying. Influence of tunnel lining-soil interface viscoelasticity on subway vibration propagation[J]. Chinese Journal of Rock Mechanics and Engineering, 2019,38(S2):3460-3468. [3] 杨觅，门玉明，袁立群,等. 地裂缝环境下不同隧道型式的地铁振动响应数值分析[J]. 防灾减灾工程学报，2016, 36(02):188-195. YANG Mi, MEN Yuming, YUAN Liqun, et al. Numerical analysis of subway vibration responses for different tunnel types in ground fissure areas[J]. Journal of Disaster Prevention and Mitigation Engineering, 2016, 36(02):188-195. [4] 陈国兴，陈苏，杜修力，等. 城市地下结构抗震研究进展[J]. 防灾减灾工程学报，2016, 36(01):1-23. CHEN Guoxing, CHEN Su, DU Xiuli, et al. Review of seismic damage, model test, available design and analysis methods of urban underground structures: retrospect and prospect[J]. Journal of Disaster Prevention and Mitigation Engineering, 2016, 36(01):1-23. [5] 张波，李术才，张敦福，等. 岩石介质中地铁列车运行引起的环境振动响应研究[J]. 岩石力学与工程学报，2011, 30(S1):3341-3347. ZHANG Bo, LI Shucai, ZHANG Dunfu, et al. Research on rock environments vibration response induced by metro trains in rock media[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(S1):3341-3347. [6] 董飞，房倩，张顶立，等. 北京地铁运营隧道病害状态分析[J]. 土木工程学报，2017, 50(06):104-113. DONG Fei, FANG Qian, ZHANG Dingli, et al. Analysis on defects of operational metro tunnels in Beijing[J]. China Civil Engineering Journal, 2017, 50(06):104-113. [7] 刘德军，仲飞，黄宏伟，等. 运营隧道衬砌病害诊治的现状与发展[J]. 中国公路学报，2021, 34(11):178-199. LIU Dejun, ZHONG Fei, HUANG Hongwei, et al. Present status and development trend of diagnosis and treatment of tunnel lining diseases[J]. China J. Highw,. Transp., 2021, 34(11):178-199. [8] 李文江，朱永全，刘志春. 运营期间地铁隧道衬砌结构纵向温度应力分析[J]. 中国铁道科学，2009, 30(01):74-79. LI Wenjiang, ZHU Yongquan, LIU Zhichun. Analysis of the longitudinal thermal stress of the lining structure of subway tunnel during traffic operation[J]. China Railway Science, 2009, 30(01):74-79. [9] 许晨，袁立群，门玉明，等. 地铁振动作用下穿越地裂缝隧道-地层动力响应模型试验研究[J]. 工程地质学报，2018, 26(05):1360-1365. XU Chen, YUAN Liqun, MEN Yuming, et al. Dynamic model test for response of tunnel stratum crossing ground fissure under vibration of metro[J]. Journal of Engineering Geology, 2018, 26(05):1360-1365. [10] 武旭，郭宇明，孙景来，等. 正交型裂隙岩石单轴压缩作用下的能量演化规律[J]. 地下空间与工程学报，2021, 17(S1):114-119. WU Xu, GUO Yuming, SUN Jinglai, et al. Energy evolution of orthogonal cracked rock under uniaxial loading[J]. Chinese Journal of Underground Space and Engineering, 2021, 17(S1):114-119. [11] 武旭，张丽媛，孙景来，等. 单轴压缩下交叉裂隙花岗岩变形与能量演化分析[J]. 北京交通大学学报，2021, 45(03):77-83. WU Xu, ZHANG Liyuan, SUN Jinglai, et al. Deformation and energy evolution of granite with cross-cracks under uniaxial compression[J]. Journal of Beijing Jiaotong University, 2021, 45(03):77-83. [12] 武旭，王帆，席迅，等. 正交型交叉裂隙岩石强度特征与破裂机理试验研究[J]. 煤炭学报，2020, 45(07):2681-2690. WU Xu, WANG Fan, XI Xun, et al. Experimental investigation on the strength characteristics and fracture mechanism of rock with orthogonally crossed cracks[J]. Journal of China Coal Society, 2020, 45(07):2681-2690. [13] 刘婷婷，李建春，李海波，等. 应力波通过非线性平行节理的能量分析[J]. 岩石力学与工程学报，2013, 32(8): 1610-1617. LIU Tingting, LI Jianchun, LI Haibo, et al. Energy analysis of stress wave propagation across parallel nonlinear joints[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(8): 1610-1617. [14] 邹飞，李海波，周青春，等. 岩石节理倾角和间距对隧道掘进机破岩特性影响的试验研究[J]. 岩土力学，2012, 33(6):1640-1646. ZHOU Fei, LI Haibo, ZHOU Qinchun, et al. Experimental study of influence of joint space and joint angle on rock fragmentation by TBM disc cutter[J]. Rock and Soil Mechanics, 2012, 33(6):1640-1646. [15] 刘红岩，黄妤诗，李楷兵，等. 预制节理岩体试件强度及破坏模式的试验研究[J]. 岩土力学，2013, 34(5): 1235-1241. LIU Hongyan, HUANG Yushi, LI Kaibing, et al. Test study of strength and failure mode of pre-existing jointed rock mass[J]. Rock and Soil Mechanics, 2013, 34(5): 1235-1241. [16] 刘红岩，邓正定，王新生，等. 节理岩体动态破坏的SHPB 相似材料试验研究[J]. 岩土力学，2014, 35(3): 659-665. LIU Hongyan, DENG Zhengding, WANG Xinsheng, et al. Similar material test study of dynamic failure of jointed rock mass with SHPB[J]. Rock and Soil Mechanics, 2014, 35(3): 659-665. [17] 王建国，高全臣，陆华，等. 分层介质冲击响应的SHPB实验研究[J]. 振动与冲击，2015, 34(19):192-197. WANG Jianguo, GAO Quancheng, LU Hua, et al. Impact response tests of layered medium with SHPB[J]. Journal of Vibration and Shock, 2015,34(19):192-197. [18] 杨阳，杨仁树，王建国. 节理厚度对岩石动力特性影响的模拟试验[J]. 中国矿业大学学报，2016, 45(02):211-216. YANG Yang, YANG Renshu, WANG Jianguo. Simulation material experiment on dynamic mechanical properties of jointed rock affected by joint thickness[J]. Journal of China University of Mining & Technology, 2016, 45(02):211-216. [19] 杨仁树，王茂源，杨阳，等. 充填材料对节理岩石动力学性能影响的模拟试验[J].振动与冲击，2016, 35(12):125-131. YANG Renshu, WANG Maoyuan, YANG Yang, et al. Simulation material experiment on the dynamic mechanical properties of jointed rock affected by joint-filling material[J], Journal of Vibration and Shock, 2016, 35(12):125-131. [20] 马钢，高松涛，王卓然，等. 低速冲击下纤维混凝土梁的动力学特征与断裂耗能研究[J]. 振动与冲击，2022, 41(08):208-216. MA Gang, GAO Songtao, WANG Zhuoran, et al. Dynamic characteristics and fracture energy dissipation of fiber reinforced concrete beams under low-velocity impact[J], Journal of Vibration and Shock, 2022, 41(08):208-216.