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Title: Numerical study of bond behaviour in reinforced concrete structures
Author: Razouki, W. K. N.
Awarding Body: University College of Swansea
Current Institution: Swansea University
Date of Award: 1991
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The present investigation is concerned with the numerical modelling of bond in reinforced concrete structures using the finite element method. The thesis is divided into three main parts. In the first part, the numerical model for describing the behaviour of reinforced concrete structures under short-term monotonic loading is presented for two dimensional plane stress and axisymmetric situations. Two examples were selected to assess the accuracy of the implementation. The second part of this thesis is concerned with the material modelling of bond for plain and deformed bars. For plain bars, the adopted bond model is based upon an assumed non-linear relationship between bond stress and slip in which the localised ultimate bond stress is a function of both the lateral pressure exerted by the concrete on reinforcement and the radial contraction due to Poisson's effects. For deformed bars, however, the mode of failure is quite different under low applied lateral pressure. Deformed bars fail by splitting of the concrete cover rather than by shearing mechanism as in the case of plain bars. In the present work, a simple procedure for predicting splitting cracks is proposed. The basic idea of the 'splitting cracks model' for deformed bars is to express the value of the bond stress at which splitting cracks may occur in the concrete as a function of the tensile strength of concrete. A wide range of problems dominated by bond deterioration are analysed and the results are fully discussed. The third part of the present work deals with the finite element representation of bond and steel in reinforced concrete structures. In the present work bond and steel are combined into one element. Verification of the formulation with reference to five examples was carried out.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available