不同龄期混凝土多次冲击损伤特性试验研究

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摘要为了解不同龄期混凝土多次冲击损伤特性，利用大杆径分离式霍金森压杆(SHPB)试验装置对5种不同龄期下的支护混凝土分别进行多次冲击压缩试验，并采用Weibull分布的统计损伤模型分析其损伤特性，系统地了解多次冲击荷载对混凝土造成的损伤规律。结果表明，对每一龄期混凝土，在其临界入射能75%水平的冲击条件下，第一次冲击有助于提高混凝土的抗压强度，之后随着冲击次数增加，混凝土的抗压能力、变形能力都变弱。随着龄期的增长，混凝土损伤–应变曲线表现出2种不同变化形式，损伤度对入射能的敏感度降低，试样失稳时的累积损伤没有明显的变化，均在1.00左右；而峰值损伤则以对数函数关系降低，其中稳定龄期的峰值损伤表明，Weibull分布的统计损伤模型能反映材料的损伤特性。

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关键词 ：岩石力学, 混凝土, 损伤, 分离式霍普金森压杆, Weibull分布, 龄期

Abstract：In order to understand the damage properties of different ages concrete under multiple impact loads systematically，the impact compression tests of 5 early ages concrete were conducted with a large diameter split Hopkinson pressure bar. The damage properties were analyzed by the statistical damage theory based on Weibull distribution to systematically study the damage law of concrete induced by repeated impact loads. The results show that，under the impact condition of 75% critical incident energy，the first time impact could improve the compressive strength of each age concrete. Then，the compressive strength and deformability become weaker with the increasing impact times. The damage-strain curve of concrete displayed different damage properties with the growth of ages. The sensitivity of damage to incident energy decreased. There was no obvious changes of cumulative damage when sample was broken as the age increased，almost at 1.00. However，the peak damage decreased logarithmically as the age increased. Peak damage at stable age indicated that the damage properties can be presented by the statistical damage model based on Weibull distribution.

Key words： rock mechanics concrete damage split Hopkinson pressure bar(SHPB) Weibull distribution age

收稿日期: 2012-03-22

引用本文:

李夕兵1，王世鸣1，宫凤强1，马海鹏1，钟放平2. 不同龄期混凝土多次冲击损伤特性试验研究[J]. 岩石力学与工程学报, 2012, 31(12): 2465-2472.
LI Xibing1，WANG Shiming1，GONG Fengqiang1，MA Haipeng1，ZHONG Fangping2. EXPERIMENTAL STUDY OF DAMAGE PROPERTIES OF DIFFERENT AGES CONCRETE UNDER MULTIPLE IMPACT LOADS. , 2012, 31(12): 2465-2472.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2012/V31/I12/2465

[1]	GRADY D E，KIPP M E. Continuum modelling of explosive fracture in oil shale[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1980，17(3)：147-157. " target="_blank">
[2]	KRAJCINOVIC D，SILVA M A G. Statistical aspects of the continuous damage theory[J]. International Journal of Solids and Structures，1982，18(7)：551-562. " target="_blank">
[3]	曹文贵，赵明华，刘成学. 基于Weibull分布的岩石损伤软化模型及其修正方法研究[J]. 岩石力学与工程学报，2004，23(19)：3 226- 3 231.(CAO Wengui，ZHAO Minghua，LIU Chengxue. Study on the model and its modifying method for rock softening and damage based on Weibull random distribution[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(19)：3 226-3 231.(in Chinese))
[4]	蒋国平，焦楚杰. 基于SHPB试验的钢纤维混凝土损伤研究[J]. 混凝土，2009，(3)：24-26.(JIANG Guoping，JIAO Chujie. SHPB experimental damage investigation used for steel-fiber concrete[J]. Concrete，2009，(3)：24-26.(in Chinese)) " target="_blank">
[5]	王道荣，胡时胜. 冲击荷载下混凝土材料损伤演化规律的研究[J]. 岩石力学与工程学报，2003，22(2)：223-226.(WANG Daorong，HU Shisheng. Study on dynamic evolution of concrete under impact load[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(2)：223-226.(in Chinese))
[6]	SOROUSHIAN P，ELZAFRANEY M. Damage effects on concrete performance and microstructure[J]. Cement and Concrete Composites，2004，26(7)：853-859.
[7]	YI S T，KIM J K，OH T K. Effect of strength and age on the stress- strain curves of concrete specimens[J]. Cement and Concrete Research，2003，33(8)：1 235-1 244. " target="_blank">
[8]	HAN S H，KIM J K. Effect of temperature and age on the relationship between dynamic and static elastic modulus of concrete[J]. Cement and Concrete Research，2004，34(7)：1 219-1 227. " target="_blank">
[9]	中华人民共和国国家标准编写组. GB/T 50081—2002 普通混凝土力学性能试验方法标准[S]. 北京：中国建筑工业出版社，2002.(The National Standards Compilation Group of People?s Republic of China. GB/T 50081—2002 Standard for test method of mechanical properties on ordinary concrete[S]. Beijing：China Architecture and Building Press，2002.(in Chinese)) " target="_blank">
[10]	BISCHOFF P H，PERRY S H. Compressive behaviour of concrete at high strain rates[J]. Materials and Structures，1991，24(6)：425-450. " target="_blank">
[11]	LI X B，LOK T S，ZHAO J，et al. Oscillation elimination in the Hopkinson bar apparatus and resultant complete dynamic stress-strain curves for rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2000，37(7)：1 055-1 060. " target="_blank">
[12]	王世鸣，李夕兵，宫凤强，等. 静载和动载下不同龄期混凝土力学特性的试验研究[J]. 工程力学(待刊).(WANG Shiming，LI Xibing，GONG Fengqiang，et al. Experimental study of mechanical properties of different ages concrete under static and dynamic load[J]. Engineering Mechanics，(to be pressed).(in Chinese)) " target="_blank">
[13]	李夕兵，宫凤强，ZHAO J，等. 一维动静组合加载下岩石冲击破坏试验研究[J]. 岩石力学与工程学报，2010，29(2)：251-260.(LI Xibing，GONG Fengqiang，ZHAO J，et al. Test study of impact failure of rock subjected to one-dimensional coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：251-260.(in Chinese))
[14]	宫凤强. 动静组合加载下岩石力学特性和动态强度准则的试验研究[博士学位论文][D]. 长沙：中南大学，2010.(GONG Fengqiang. Experimental study of rock mechanical properties under coupled static-dynamic loads and dynamic strength criterion[Ph. D. Thesis][D]. Changsha：Central South University，2010.(in Chinese)) " target="_blank">
[15]	吴政，张承娟. 单向荷载作用下岩石损伤模型及其力学特性研究[J]. 岩石力学与工程学报，1996，15(1)：55-61.(WU Zheng，ZHANG Chengjuan. Investigation of rock damage model and its mechanical behaviour under unidirectional load[J]. Chinese Journal of Rock Mechanics and Engineering，1996，15(1)：55-61.(in Chinese))
[16]	郑颖人，赵尚毅，张鲁渝，等. 有限元强度折减法在土坡和岩坡中的应用[C]// 中国岩石力学与工程学会第七次学术大会论文集. 北京：中国科学技术出版社，2002：70-76.(ZHENG Yingren，ZHAO Shangyi，ZHANG Luyu，et al. Application of strength reduction FEM to soil and rock slopes[C]// Proceedings of the 7th Chinese Society for Rock Mechanics and Engineering. Beijing：China Science and Technology Press，2002：70-76.(in Chinese)) " target="_blank">
[17]	单仁亮，薛友松，张倩. 岩石动态破坏的时效损伤本构模型[J].岩石力学与工程学报，2003，22(11)：1 771-1 776.(SHAN Renliang，XUE Yousong，ZHANG Qian. Time dependent damage model of rock under dynamic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(11)：1 771-1 776.(in Chinese)) " target="_blank">
[18]	唐晓军. 循环荷载作用下岩石损伤演化规律研究[硕士学位论文][D]. 重庆：重庆大学，2008.(TANG Xiaojun. Study on damage evolvement rules of rock under cyclic load[M. S. Thesis][D]. Chongqing：Chongqing University，2008.(in Chinese)) " target="_blank">
[19]	胡柳青，李夕兵，赵伏军. 冲击荷载作用下岩石破裂损伤的能耗规律[J]. 岩石力学与工程学报，2002，21(增2)：2 304-2 308.(HU Liuqing，LI Xibing，ZHAO Fujun. Study of consumption in fracture and damage of rock induced by impact loading[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(Supp.2)：2 304-2 308. (in Chinese)) " target="_blank">
[20]	BISCHOFF P H，PERRY S H. Impact behavior on plain concrete loaded in uniaxial compression[J]. Journal of Engineering Mechanics，1995，121(6)：685-693. " target="_blank">
[21]	ROSS C A，TEDESCO J W，KUENNEN S T. Effects of strain rate on concrete strength[J]. Materials Journal，1995，92(1)：37-47. " target="_blank">
[22]	ZHANG M，WU H J，LI Q M，et al. Further investigation on the dynamic compressive strength enhancement of concrete-like materials based on split Hopkinson pressure bar tests. Part I：experiments[J]. International Journal of Impact Engineering，2009，36(12)：1 327-1 334. " target="_blank">
[23]	熊华，扶名福，罗奇峰. 混凝土分段曲线损伤模型[J]. 力学季刊，2004，25(3)：342-348.(XIONG Hua，FU Mingfu，LUO Qifeng. A new subsection curve damage model of concrete[J]. Chinese Quarterly of Mechanics，2004，25(3)：342-348.(in Chinese))