Numerical Analysis on Waveforms in Split Hopkinson Pressure Bar Tests of Concrete under Active Confining Pressures

YUAN Wei; JIN Jie-fang; LIANG Chen; WANG Jie; CHENG Yun; HE Cong; GUO Zhong-qun

doi:10.11988/ckyyb.20170142

PDF(3166 KB)

Journal of Changjiang River Scientific Research Institute ›› 2018, Vol. 35 ›› Issue (7) : 141-146. DOI: 10.11988/ckyyb.20170142

HYDRAULIC STRUCTURE AND MATERIAL

Numerical Analysis on Waveforms in Split Hopkinson Pressure Bar Tests of Concrete under Active Confining Pressures

YUAN Wei, JIN Jie-fang, LIANG Chen, WANG Jie, CHENG Yun, HE Cong, GUO Zhong-qun

Author information +

History +

Abstract

In an attempt to explore the relationship between dynamic response of concrete and waveform of reflected waves during Split Hopkinson Pressure Bar (SHPB) tests under confining pressure, we simulated the SHPB tests under active confining pressure using LS-DYNA based on the Johnson-Holmquist Concrete constitutive model. We also analyzed the influence of confining pressure on dynamic properties of concrete in terms of changes in waveform characteristics. Results show that the failure mode of concrete under confining pressure is compression-shear failure, and the average degree of damage decreases with the climbing of confining pressure. The reflected wave in SHPB test is featured with double peaks, of which the first peak stress is barely affected by confining pressure, but by the magnitude of impact wave; while the second peak stress is significantly affected by confining pressure, declining with the increase of confining pressure, which implies the deformation degree of specimens. Compressive wave was found in the end of the reflected wave; with the increase of confining pressure, peak stress of the compressive wave increased as well, indicating an enhancement in deformation capacity and residual bearing capacity of the concrete specimen. The research achievements could serve as a reference for evaluating the dynamic damage and residual bearing capacity of concretes under triaxial stress.

Key words

concrete / SHPB tests / active confining pressure / degree of damage / double-peak characteristic / compressive wave

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

YUAN Wei, JIN Jie-fang, LIANG Chen, WANG Jie, CHENG Yun, HE Cong, GUO Zhong-qun. Numerical Analysis on Waveforms in Split Hopkinson Pressure Bar Tests of Concrete under Active Confining Pressures[J]. Journal of Changjiang River Scientific Research Institute. 2018, 35(7): 141-146 https://doi.org/10.11988/ckyyb.20170142

References

[1] 顾培英,肖仕燕,邓昌,等.冲击荷载作用下混凝土重力坝破坏特性分析[J].长江科学院院报,2016,33(5): 48-52.
[2] 黄仕超,彭刚,邹三兵,等.不同龄期混凝土动态力学性能研究[J].长江科学院院报,2015,32(12):129-133,143.
[3] 胡伟华,彭刚,黄仕超,等.基于声发射技术的混凝土动态损伤特性研究[J].长江科学院院报,2015,32(2): 123-127,132.
[4] CANDAPPA D P, SETUNGE S, SANJAYAN J G. Stress Versus Strain Relationship of High Strength Concrete under High Lateral Confinement[J]. Cement and Concrete Research, 1999, 29(12): 1977-1982.
[5] 谢和平,董毓利,李世平.不同围压下混凝土受压弹塑性损伤本构模型的研究[J].煤炭学报,1996, 21(3):265-270.
[6] GONG J C, MALVERN L E. Passively Confined Tests of Axial Dynamical Compressive Strength of Concrete[J]. Experimental Mechanics, 1990, 30(1): 55- 59.
[7] 薛志刚,胡时胜.水泥砂浆在围压下的动态力学性能[J]. 工程力学,2008,25(12):184-188.
[8] YIN Z Q, LI X B, JIN J F,et al. Failure Characteristics of High Stress Rock Induced by Impact Disturbance under Confining Pressure Unloading[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(1): 175-184.
[9] 张华,郜余伟,武守锋.混凝土材料SHPB主动围压实验的数值模拟[J].合肥工业大学学报(自然科学版),2012, 35(2):217-220.
[10]HAO Y, HAO H. Dynamic Compressive Behavior of Spiral Steel Fiber Reinforced Concrete in Split Hopkinson Pressure Bar Tests[J]. Construction and Building Materials, 2013, 48: 521-532.
[11]李夕兵,古德生,赖海辉.冲击载荷下岩石动态应力-应变全图测试中的合理加载波形[J].爆炸与冲击,1993,13(2): 125-130.
[12]吴赛,赵均海,李楠.被动围压下混凝土的动态力学性能研究[J].应用力学学报,2015,32(6): 992-998.
[13]巫绪涛,孙善飞,李和平.用HJC本构模型模拟混凝土SHPB试验[J].爆炸与冲击,2009,29(2):137-142.
[14]潘城,赵光明,孟祥瑞.爆炸荷载作用下围岩累积损伤效应的数值分析[J].爆破,2016,33(1): 30-33,44.
[15]陈腾飞,许金余,刘石,等.混凝土与岩石类脆性材料的动态破坏机制研究[J].混凝土,2013,(7):20-22.
[16]GRADY D E, KIPP M E. Continuum Modeling of Explosive Fracture in Oil Shale[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, 1980, 17(2): 147-157.
[17]金解放,李夕兵,殷志强,等.循环冲击下波阻抗定义岩石损伤变量的研究[J].岩土力学,2011,32(5):1385-1393,1410.
[18]陈荣,林玉亮,卢芳云,等.Barre花岗岩动态压缩破坏特性研究[J].岩石力学与工程学报,2009,28(增1):2743 -2748.
[19]王礼立.应力波基础[M].2版.北京:国防工业出版社,2005: 45-48.