Open AccessPhysical essence of the “nagel effect” for main reinforcement in an inclined crack of reinforced concrete structures
Author(s) -
Владимир Колчунов,
Б. Н. Смирнов,
N. V. Naumov
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/896/1/012055
Subject(s) - reinforcement , discontinuity (linguistics) , rotation (mathematics) , structural engineering , displacement (psychology) , bending , deformation (meteorology) , surface (topology) , bending moment , action (physics) , reinforced concrete , geometry , mechanics , physics , mathematics , materials science , mathematical analysis , engineering , composite material , psychology , quantum mechanics , psychotherapist
The physical essence of the “nagel effect” for main reinforcement in an inclined crack of reinforced concrete structures for the model of deformation of reinforced concrete structures includes formation of the first block and the second block of an inclined crack. This effect is considered is constructions under the action of vertical load, with linear displacements (normal to the axis of the beam) and rotations of the fixed end. We can find the unknown τ ad from the canonical equations for structural mechanics. When we multiply the single diagrams of bending moments caused by displacements Δ 1 and Δ 2 and displacement caused by longitudal force N s ( x ) and increment ΔN s . In this case, for the “nagel effect”, we take into account the presence of several forces and displacements: the force P1 for the surface for the second block; adhesion to the surface of the reinforcement τ ad and a special force for the effect of discontinuity ( ΔT ); displacements for mutual shifts of the crack edges (Δ 1 ); movement from the width of the crack opening (Δ 2 = a crc ); angle of rotation for the fixed ends; variable longitudinal force in the fixed ends.