Modification of DIF-strain rate curve of concrete-like materials in numerical simulation of SHPB experiments

被引：0

作者：

Li X. ^{[1
]}

Fang Q. ^{[1
]}

Kong X.-Z. ^{[1
]}

Wu H. ^{[1
]}

机构：

[1] State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University, Nanjing

来源：

Fang, Qin (13776608867@139.com) | 2018年 / Tsinghua University卷 / 35期

关键词：

Concrete-like materials; Inertial effect; Numerical simulation; SHPB experiments; Strain rate effect;

D O I：

10.6052/j.issn.1000-4750.2017.10.0764

中图分类号：

学科分类号：

摘要：

Numerical simulation is an effective technique to study the response of concrete-like materials to dynamic loads. For predicting the concrete-like materials structure response to dynamic loads, it's important to input the DIF-strain rate curve exactly in numerical simulation. The data in dynamic compressive experiments of concrete-like materials since 1990 was collected, and the inertia-induced effect on dynamic strength of material was stripped out to obtain DIF ε -logε curve. It is discovered that DIF s and DIF i increase with specimen size. At the same time, DIF i of concrete-like materials increase less with the strain rate when the quasi-static strength of the materials increases. New curve and semi-empirical formula curve were compared, which show that the new curve was coincided with DIF ε of experiments better than the semi-empirical formula at high strain rate. Furthermore, the superiorities of new curve are validated by comparing the DIF recommended by CEB with the new curve as the numerical inputs. © 2018, Engineering Mechanics Press. All right reserved.

引用

页码：046 / 053

页数：7

共 28 条

[1] Bresler B., Bertero V.V., Influence of high strain rate and cyclic loading of unconfined and confined concrete in compression, The 2nd Canadian Conference on Earthquake Engineering, pp. 1-13, (1975)
[2] Takeda J., Tachikawa H., The mechanical properties of several kinds of concrete at compressive, tensile, and flexural tests in high rates of loading, Transactions of the Architectural Institute of Japan, 77, pp. 1-6, (1962)
[3] Hughes B.P., Gregory R., Concrete subjected to high rates of loading in compression, Magazine of Concrete Research, 24, 78, pp. 25-36, (1972)
[4] Watstein D., Effect of straining rate on the compressive strength and elastic properties of concrete, ACI Journal Proceedings, 49, 4, pp. 729-744, (1953)
[5] Hughes B.P., Watson A.J., Compressive strength and ultimate strain of concrete under impact loading, Magazine of Concrete Research, 30, 105, pp. 189-199, (1978)
[6] Ross C.A., Tedesco J.W., Split-Hopkinson pressure-bar tests on concrete and mortar in tension and compression, Materials Journal, 86, 5, pp. 475-481, (1989)
[7] Ross C.A., Tedesco J.W., Kuennen S.T., Effects of strain rate on concrete strength, Materials Journal, 92, 1, pp. 37-47, (1995)
[8] Ross C.A., Jerome D.M., Tedesco J.W., Et al., Moisture and strain rate effects on concrete strength, Materials Journal, 93, 3, pp. 293-300, (1996)
[9] Malvern L.E., Jenkins D.A., Tang T., Et al., Dynamic compressive testing of concrete, Proceedings of 2nd Symposium on the Interaction of Non-nuclear Munitions with Structures, pp. 194-199, (1985)
[10] Grote D.L., Park S.W., Zhou M., Dynamic behavior of concrete at high strain rates and pressures: I. experimental characterization, International Journal of Impact Engineering, 25, 9, pp. 869-886, (2001)

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