Author(s)

A. P. Lampropoulos, 0.T. Tsioulou & S. E. Dritsos

Abstract

Analytical prediction for the capacity of oldnew concrete interfaces A. P. Larnpropoulos, 0. T. Tsioulou & S. E. Dritsos Department of Civil Engineering, University of Patras, Greece Abstract The ANSYS computer program has been used to examine the behaviour of the interface between old and new concrete in a column strengthened by the addition of a concrete jacket. The friction, the cohesion and the thickness of the jacket are the three parameters that have been examined. Friction and cohesion are considered as the parameters that influence the strength at the interface. The maximum shear strength at the interface is given by the equation Tli, = pP+c, where: p is the frictional coef$cient, P is the contact normal pressure and c is the contact cohesion. Initially, a smooth contact, where the friction and the cohesion are very small, has been examined. Then a rough contact surface was used. Finally, a column that has been strengthened with thicker concrete jacket has been investigated. After all o

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