Rigidité d'une zone tendue de béton armé

Abstract

Les mbthodes analytiques modernes de calcul des fl~ches des structures en b~ton armk

Moment curvature relationship of reinforced concrete sections under combined bending and normal force

“…This model is purely analytical and uses only hypotheses recommended in the CEB Model Code. In particular, the tension stiffening effects are modelled using a formula previously derived by the authors from pure tension tests [9] and whose stabilized cracking part will be found in the next edition of the CEB Model Code 1990 [8].…”

“…For the computation of AEs, we suggest using the tension stiffening formula which was deduced from our tests on reinforced concrete prisms in pure tension [9]. It is represented in Fig.…”

“…In this paper, as a first approximation, we will also assume that -~-~. ; (9) The first problem to solve is the computation of AEs b. In Equation 8, er is the concrete strain corresponding to the tensile strength and is therefore given by e, = fr162 (assuming that the behaviour of concrete under tension remains linear up to its tensile strength); Esr is the strain of the reinforcement at the cracking bending moment level, computed in the fully cracked State II.…”

Bond-slip law and short tie behavior without main cracks

“…• Mean fictitious behavioral laws of taut concrete, taking into account the addition of the reinforcement and concrete contributions to the cross section of the 'tie rod' [6][7][8][9]. • Fictitious behavioral laws of tensile steel (concrete-coated steel), implicitly taking into account tensed concrete in the form of a corrective term (Relative elongation deviation Δε, between bare steel and concrete-coated steel for the same tensile force) [10][11][12].…”