Compressive strength of slender concrete masonry walls

Abstract

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Influence of tensile strength on the load bearing capacity of tall reinforced masonry walls

“…YOKEL et al [9] identified that the end support conditions of the wall, parameter also verified more recently in PETTIT et al [10], the elasticity modulus of the masonry, the shape of the bending moment diagram, and the geometric properties of the section, such as the second moment area are variables not considered in the normative criteria, but that significantly affect the masonry behavior. YOKEL et al [9] applied concepts from the formulation developed in MACGREGOR et al [11] to verify buckling of reinforced concrete columns in masonry walls. In this formulation, 40% of the product between the elasticity modulus and the second moment of area of the uncracked reinforced section was taken into account for simplified consideration of damage by cracking and loss of stiffness.…”

“…In this formulation, 40% of the product between the elasticity modulus and the second moment of area of the uncracked reinforced section was taken into account for simplified consideration of damage by cracking and loss of stiffness. The authors [9] also found that for unreinforced masonry only 28.5% of the uncracked stiffness can be considered. By assuming a linear distribution of normal stresses, considering total compression of the section for eccentricities (e) smaller than 1/6 of the thickness (t), YOKEL [12] published an analytical solution, Equation 1, to determine the critical load (P cr ) and the consequent lateral instability of a full section prismatic element with no tensile strength.…”

“…However, the literature has indicated that for λ = 40 the rupture occurs by compression [7,8] and that the transition from compression rupture mode to buckling rupture occurs at λ = 60 [8]. To investigate the influence of slenderness and load eccentricity on the bearing capacity of slender walls, YOKEL et al [9] performed experiments and applications of analytical methods, with reinforced and unreinforced masonry. YOKEL et al [9] identified that the end support conditions of the wall, parameter also verified more recently in PETTIT et al [10], the elasticity modulus of the masonry, the shape of the bending moment diagram, and the geometric properties of the section, such as the second moment area are variables not considered in the normative criteria, but that significantly affect the masonry behavior.…”

“…To investigate the influence of slenderness and load eccentricity on the bearing capacity of slender walls, YOKEL et al [9] performed experiments and applications of analytical methods, with reinforced and unreinforced masonry. YOKEL et al [9] identified that the end support conditions of the wall, parameter also verified more recently in PETTIT et al [10], the elasticity modulus of the masonry, the shape of the bending moment diagram, and the geometric properties of the section, such as the second moment area are variables not considered in the normative criteria, but that significantly affect the masonry behavior. YOKEL et al [9] applied concepts from the formulation developed in MACGREGOR et al [11] to verify buckling of reinforced concrete columns in masonry walls.…”