Authors:
Asad-ur-Rehman Khan,Tatheer Zahra,DOI NO:
https://doi.org/10.26782/jmcms.2019.04.00002Keywords:
Multiaxial stresses,Elasto-damage modeling,Confinement,Damage accumulation,Proportionate loading, Non-proportionate loading,Abstract
This study focuses on the improvement of predictive capabilities of elasto-damage model, initially proposed by Khan et al., for concrete subjected to multiaxial state of stress. The critical energy release rate 𝑅𝑐, which was initially assumed constant, is defined as a function of 𝑓𝑐′, and 𝐸𝑜 in the present study. Parameters 𝛼,𝛽 and 𝛾 used in effective compliance matrix, are redefined for the proposed form of 𝑅𝑐 by regressing against available experimental data to obtain better estimates. The computer code for implementing the model is modified such that it is able to predict the response of concrete under both proportionate and non-proportionate loadings. The predictive capability of model to simulate stress-strain response of concrete subjected to multiaxial stresses and confining pressures is shown to have improved. The model is able to predict essential phenomenological behavior of concrete which relate well with the experimental results.Refference:
I.A.R.Khan, A.H.Gadhib, M.H.Baluch, “Elasto-damage model for high strength concrete subjected to multiaxialloading”, International Journal of Damage Mechanics; Vol. 16,pp. 361-398, July 2007.
II.A.R.Khan, N.Naseem, “Damage model for normal and high strength concrete”. In Proceedings of Concrete Modelling (CONMOD ’08), Delft, The Netherlands, 26-28 May, 2008.
III.C.Z.Wang, Z.H.Guo, X.Q.Zhang, “Experimental investigation of biaxial and triaxial compressive concrete strength”, ACI Materials Journal, Vol. 84, pp. 92–100, 1987.
IV.D.C.Candappa, J.G.Sanjayan, S.Setunge, “Complete triaxial stress-strain curves of high-strengthconcrete”, Journal of Materials in Civil Engineering, Vol.: 13, Issue: 3, 209–215, 2001.
V.D.Sfer, I.Carol, R.Gettu, “Study of the behaviour of concrete under triaxial compression”, Journal of Engineering Mechanics, ASCE, Vol.: 128, Issue: 2,pp. 156-163, 2002.
VI.G.Wischers, “Applications of effects of compressive loads on concrete”. BetonTechnischeBerichte No 2 and 3, Duesseldorf, Germany. 1978.
VII.G.Z.Voyiadjis, J.M.Abu-Lebdeh, “Plasticity model for concrete using the bounding surface concept”, International Journal of Plasticity;Vol.: 10, pp. 1-21, 1994.
VIII.H.B.Kupfer, H.K.Hildrof, H.Rusch, “Behavior of concrete under biaxial stresses”, Proc ACI, Vol.: 66, Issue: 8, pp.656-666, 1969.
IX.H.C.Wu, C.Komarakulnanakorn, “Endochronic theory of continuum damage mechanics”, Journal of Engineering Mechanics, ASCE;Vol.: 124, Issue: 2, 200-208, 1998.
X.I.Imran, J.Pantazopoulou, “Experimental study of plain concrete under triaxial stress”, ACI Materials Journal, Vol.: 93, Issue: 6, pp. 589–601, 1996.
XI.J.Lee, G.L.Fenves, “Plastic-Damage model for cyclic loading of concrete structures”, Journal of Engineering Mechanics, ASCE, Vol. 124, Issue: 8, pp. 892-900, 1998
XII.J.Linhua, H.Dahai, X.Nian Xing, “Behavior of concrete under traixial compressive-compressive -tensile stresses”, ACI Materials Journal, Vol.; 88, Issue: 2, pp. 181-185, 1991.
XIII.M.Attard, S.Setunge, “Stress-strain relationship of confined and unconfined concrete”, ACI Materials Journal,Vol.: 93, Issue: 5, pp. 433–442, 1996.
XIV.R.R.Babu, G.S.Benipal, A.K.Singh, “Constitutive modeling of concrete: An overview”, Asian Journal of Civil Engineering (Building and Housing), Vol.:6, Issue: 4, pp. 211-246, 2005.
XV.S.H.Ahmad, S.P.Shah, “Complete triaxial stress-strain curves for concrete”, Proc. ASCE, Vol.: 108, Issue: 4, pp. 728–742, 1982.
XVI.T.Gabet, X. H.Vu, Y.Malecot, L.Daudeville, “A new experimental technique for the analysis of concrete under high triaxial loading”, Journal de Physique IV, Vol.: 134, pp. 635-640, 2006.
XVII.T.Hampel, K.Speck, S.Scheerer, R.Ritter, M.Curbach, “High-performance concrete under biaxial and triaxial loads”, Journal of Engineering Mechanics, ASCE, Vol.: 135, Issue: 11, pp. 1274-1280, 2009.
XVIII.T.H.Wee, M.S.Chin, M.A.Mansur, “Stress-strain relationship of high-strength concrete in compression”, Journal of Materials in Civil Engineering, ASCE, Vol.: 8, Issue: 2, pp. 70-76, 1996.
XIX.V.S.Gopalratnam, S.P.Shah, “Softening response of plain concrete in direct tension”, Proc. ACI,Vol.: 82, Issue: 3, pp. 310-323, 1985.
XX.W.F.Chen, Constitutive Equations for Engineering Materials, Vol.1: Elasticity and Modelling, Elsevier Publications, 1994.
XXI.W.P.Lokuge, J.G.Sanjayan, S.Setunge, “Stress strain model for laterally confined concrete”, Journal of Materials in Civil Engineering, ASCE; Vol.: 17, Issue: 6, pp. 607–616, 2005.
XXII.W.Suaris, C.Ouyang, V.M.Fernando, “Damage model for cyclic loading of concrete”, Journal of Engineering Mechanics, ASCE, Vol. 116, Issue: 5, pp. 1020-1035, 1990.
Asad-ur-Rehman Khan, Tatheer Zahra View Download