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http://dx.doi.org/10.7734/COSEIK.2017.30.2.137

A Tensile Criterion to Minimize FE Mesh-Dependency in Concrete Beam under Blast Loading  

Kwak, Hyo-Gyoung (Department of Civil and Environmental Engineering, KAIST)
Gang, HanGul (Department of Civil and Environmental Engineering, KAIST)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.30, no.2, 2017 , pp. 137-143 More about this Journal
Abstract
A tensile failure criterion that can minimize the mesh-dependency of simulation results on the basis of the fracture energy concept is introduced, and conventional plasticity based damage models for concrete such as CSC model and HJC model, which are generally used for the blast analyses of concrete structures, are compared with orthotropic model in blast test to verify the proposed criterion. The numerical prediction of the time-displacement relations in mid span of the beam during blast loading are compared with experimental results. Analytical results show that the numerical error is substantially reduced and the accuracy of numerical results is improved by applying a unique failure strain value determined according to the proposed criterion.
Keywords
high strain rate concrete; blast simulation; failure strain; mesh-dependency; fracture energy;
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1 Bara, A., Klepaczko, J.R. (2007) Fracture Energy of Concrete at High Loading Rates in Tension, Int. J. Impact Eng., 34(3), pp.425-435.
2 Carpinteri, A., Ferro, G. (1994) Size Effects on Tensile Fracture Properties: A Unified Explanation based on Disorder and Fractality of Concrete Microstructure, Mater. & Struct., 27(10), pp.563-571.   DOI
3 CEB(Euro International Committee for Concrete) (1993) CEB-FIP Model Code 1990:Design Code.
4 Gang, H.G. (2017) Material Modeling for Impact and Blast Analyses of RC Structures, Ph. D Dissertation, KAIST, p.83.
5 Georgin, J., Reynouard, J. (2003) Modeling of Structures Subjected to Impact: Concrete Behaviour under High Strain Rate, Cement & Concr. Compos., 25(1), pp.131-143.   DOI
6 Hallquist, J.O. (2007) LS-DYNA Keyword user's Manual, Livemore Software Technology Corporation.
7 Holmquist, T.J., Johnson, G.R., Cook, W.H. (1993) A Computational Constitutive Model for Concrete Subjected to Large Strains, High Strain Rates and High Pressure, 14th Int. Symp. Ballistics, Quebec, Canada, pp.591-600.
8 Kwak, H.G., Gang, H.G. (2015) An Improved Criterion to Minimize FE Mesh-dependency in Concrete Structures under High Strain Rate Conditions, Int. J. Impact Eng., 86, pp.84-95.   DOI
9 Kwak, H.G., Filippou, F.C. (1990) Finite Element Analysis of Reinforced Concrete Structures under Monotonic Loads, Department of civil Engineering, University of California.
10 Lim, S.J., Ahn, K.H., Huh, H., Kim, S.B. (2013) Fracture Evaluation of Metallic Materials at Intermediate Strain Rrates, Mater. Charact., 77, pp.171-179.
11 Murray, Y.D. (2007) Users Manual for LS-DYNA Concrete Material Model 159, Federal Highway Administration, p.77.
12 Seabold, R.H. (1970) Dynamic Shear Strength of Reinforced Concrete Beams. Part 3, Naval Civil Engineering Laboratory, p.86.
13 Scott, B, Park, R, Priestley, M. (1982) Stress-Strain behavior of Concrete Confined by Overlapping Hoops at Low and High Strain Rates, ACI Mater. J., 79(1), pp.13-27.
14 Vonk, R.A. (1993) A Micro-Mechanical Investigation of Concrete Loaded in Compression, Heron, 38(3).
15 Zhang, X.X., Ruiz, G., Yu, R.C., Tarifa, M. (2009) Fracture behaviour of High-Strength Concrete at a Wide Range of Loading Rates, Int. J. Impact Eng., 36(10), pp.1204-1209.   DOI
16 Wittmann, F.H., Rokugo, K., Brühwile, E., Mihashi, H., Simonin, P. (1988) Fracture Energy and Strain Softening of Concrete as Determined by Means of Compact Tension Specimens, Mater. & Struct., 21(1), pp.21-32.   DOI