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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 24
ADVANCES IN NON-LINEAR FINITE ELEMENT METHODS
Edited by: B.H.V. Topping and M. Papadrakakis
Paper IV.1

Size Effects in Structural Concrete: A Numerical Experiment

M.D. Kotsovos* and M.N. Pavlovic#

*Department of Civil Engineering, National Technical University of Athens, Athens, Greece
#Department of Civil Engineering, Imperial College of Science, Technology and Medicine, London, United Kingdom

Full Bibliographic Reference for this paper
M.D. Kotsovos, M.N. Pavlovic, "Size Effects in Structural Concrete: A Numerical Experiment", in B.H.V. Topping, M. Papadrakakis, (Editors), "Advances in Non-Linear Finite Element Methods", Civil-Comp Press, Edinburgh, UK, pp 109-118, 1994. doi:10.4203/ccp.24.4.1
Abstract
The paper forms part of a programme of investigation into the causes of size effects in structural-concrete behaviour. It is postulated that one of the causes of size effects is load-induced non-symmetrical cracking which is inherent in concrete due to its heterogeneous nature. The validity of this postulate is supported by the results - presently reported - of nonlinear finite-element analysis, in which the model used to describe cracking is capable of inducing non-symmetrical cracking in symmetrical structural members subjected to symmetrical loading. The results demonstrate that the package used can also provide a close fit to experimental values and, moreover, that the presence of stirrups (designed so as to prevent shear failure) is sufficient to diminish the effect of non-symmetrical cracking and, hence, eliminate size effects.

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