TY - JOUR

T1 - Exact solution of shear problem for inclined cracked bending reinforced concrete elements

AU - Iskhakov, I.

AU - Ribakov, Y.

N1 - Funding Information:
We thank Abi Saha, Allan Sandage, Brad Schaefer, and Gustav Tammann for sending preprints. This work has been supported by NSF grants AST 9417102 and 9417242.

PY - 2014/5

Y1 - 2014/5

N2 - In spite of a wide experimental and theoretical data on shear that forms a basis for modern design approaches, exact solution of shear problem for inclined cracked bending reinforced concrete elements is still not found. It yields high dispersion in the bearing capacity of concrete according to the main compression stresses. A similar problem appears with the internal forces carried by shear reinforcement. The above mentioned problem is related to two parameters: the angle of the main compression stresses and that of the inclined links. Corresponding internal forces together with the force in the tensile reinforcement form a commonly used design model (truss model), therefore each force depends on the other. This fact is practically not considered in modern design provisions hence there are no tools to express the shear capacity accurately. The two angles should be considered simultaneously in every case, when the links section is taken according to the calculated value (but not to the minimum one). The present study is one of the first attempts, focused on considering the interaction between the internal forces in concrete and inks according to the design model. It allows calculation of an exact angle, defining the inclined cracks and forces in links within the known experimentally investigated limits of this angle.

AB - In spite of a wide experimental and theoretical data on shear that forms a basis for modern design approaches, exact solution of shear problem for inclined cracked bending reinforced concrete elements is still not found. It yields high dispersion in the bearing capacity of concrete according to the main compression stresses. A similar problem appears with the internal forces carried by shear reinforcement. The above mentioned problem is related to two parameters: the angle of the main compression stresses and that of the inclined links. Corresponding internal forces together with the force in the tensile reinforcement form a commonly used design model (truss model), therefore each force depends on the other. This fact is practically not considered in modern design provisions hence there are no tools to express the shear capacity accurately. The two angles should be considered simultaneously in every case, when the links section is taken according to the calculated value (but not to the minimum one). The present study is one of the first attempts, focused on considering the interaction between the internal forces in concrete and inks according to the design model. It allows calculation of an exact angle, defining the inclined cracks and forces in links within the known experimentally investigated limits of this angle.

KW - Direction of shear reinforcement

KW - Inclined cracks

KW - Main compression stresses direction

KW - Shear problem

UR - http://www.scopus.com/inward/record.url?scp=84893113286&partnerID=8YFLogxK

U2 - 10.1016/j.matdes.2014.01.016

DO - 10.1016/j.matdes.2014.01.016

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AN - SCOPUS:84893113286

SN - 0261-3069

VL - 57

SP - 472

EP - 478

JO - Materials and Design

JF - Materials and Design

ER -