Research on the damage evolution and dynamic constitutive model of geopolymeric concreteat elevated temperatures

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (2) : 110-115.

WANG Zhi-kun1，XU Jin-yu1,2，REN Wei-bo1，BAI Er-lei1,DONG Zong-ge3

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Abstract

The damage evolution law and dynamic constitutive model of geopolymeric concrete at elevated temperatureswere investigated using a high temperature SHPB system. The results show that the major mechanical performance indexes reveal prominent temperature and strain rate effect.The wave impedance can be used to measure the thermal damage of geopolymericconcrete, and the damage evolution law has a good agreement with the actual situation. Based on the static constitutive model, the dynamicdamage constitutive model of geopolymeric concreteconsidering effects of temperature and strain ratewasestablished, and the indexes can be determined by experimental results. This model can accurately describe the dynamic characteristics of geopolymeric concreteat elevated temperatures.

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geopolymeric concrete;elevated temperature / strain rate / damage / constitutive model

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WANG Zhi-kun1，XU Jin-yu1,2，REN Wei-bo1，BAI Er-lei1,DONG Zong-ge3. Research on the damage evolution and dynamic constitutive model of geopolymeric concreteat elevated temperatures[J]. Journal of Vibration and Shock, 2016, 35(2): 110-115

References

[1] 许金余,罗鑫,吴菲,等. 地质聚合物混凝土动态劈裂拉伸破坏的吸能特性[J]. 空军工程大学学报:自然科学版, 2013,14(5): 85-88.
XU Jin-yu, LUO Xin, WU Fei, et al, Energy absorption capacities of geopolymer concrete under condition of dynamic splitting-tensile damage[J]. Journal of Air Force Engineering University:natural science edition, 2013, 14(5): 85-88.
[2] Davidovits J. Geopolymers and geopolymeric materials[J]. Journal of Thermal Analysis and Calorimetry, 1989, 35(2):429-441.
[3] Simo J C, Ju J W. Strain-and stress-based continuum damage models I. formulation[J]. International Journal of Solids and Structures, 1987, 23(7):821-840.
[4] Simo J C, Ju J W. Strain-and stress-based continuum damage models II. computational aspects[J]. International Journal of Solids and Structures, 1987, 23(7):841-869.
[5] Ulm F J, Coussy O, Bazant Z P. The “chunnel” fire. I: chemoplastic softening in rapidly heated concrete[J]. Journal of Engineering Mechanics, ASCE, 1999, 125(3):272-282.
[6] Willam K J, Warnke E P. Constitutive model for the triaxialbehaviour of concrete[C]//IABSE Proc. 19, Seminar on Concrete Structure Subjected to Triaxial Stresses,Zurich: International Association for Bridge and Structural Engineering, 1975.
[7] 陈江瑛,王礼立.水泥砂浆的率型本构方程[J].宁波大学学报:理工版, 2000,13(2):1-5.
CHEN Jiang-ying, WANG Li-li. Rate-dependent constitutive equation of cement mortar[J]. Journal of Ningbo University: Natural Science & Engineering Edition,2000,13(2):1-5.
[8] 许金余,刘健,范飞林,等. 高温SHPB冲击实验技术及其应用[J]. 高压物理学报, 2013, 27(1):57-62.
XU Jin-yu, LIU Jian, FAN Fei-lin, et al. A high temperature SHPB impact experimental technique and its application[J]. Journal of High Pressure Physics, 2013, 27(1):57-62.
[9] 许金余,赵德辉,范飞林.纤维混凝土的动力特性[M].西安:西北工业大学出版社, 2013.
[10] 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.
JIN Jie-fang, LI Xi-bing, YIN Zhi-qiang, et al.A method for defining rock damage variable by wave impedance under cyclic impact loadings[J].Rock and Soil Mechanics, 2011,32(5): 1385-1393.
[11] Tsai W T. Uniaxial compressional stress–strain relation of concrete[J]. StructEng,1988, 114(9): 2133-2136.
[12] Holmquist T J, Johnson G R, Cook W H. A coputational constitutive model for concrete subjiected to large strains high strain rates and high pressures[C]. In Fishler E, ed. 14th International Symposium on Ballistics, Canada,IEEE Press, 1993:591-600.