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CivilComp Proceedings
ISSN 17593433 CCP: 106
PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by:
Paper 230
The Shear Problem in Reinforced Concrete Bending Structures I. Iskhakov and Y. Ribakov
Department of Civil Engineering, Ariel University, Israel I. Iskhakov, Y. Ribakov, "The Shear Problem in Reinforced Concrete Bending Structures", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", CivilComp Press, Stirlingshire, UK, Paper 230, 2014. doi:10.4203/ccp.106.230
Keywords: shear problem, inclined cracks, shear reinforcement direction, main compression stresses direction..
Summary
The shear problem for reinforced concrete bending structures is still not solved
exactly in spite of large experimental data and many theoretical studies that have
been carried out in recent decades. The lack of an exact solution yields high
dispersion in predicting concrete shear bearing capacity. There is an additional
problem, related to the internal forces carried by shear reinforcement. Generally, the
shear problem of bending elements is related to the following two parameters that
are known from experiments: the main compression stress angle and that of the
inclined links. Corresponding internal forces and the force in the tensile
reinforcement form a commonly used truss design model, therefore each force
depends on the other (the above mentioned forces form a triangle of forces). This
dependence is practically not considered in modern design provisions therefore there
is still no exact estimation of shear capacity in bending. If the section of the links is
calculated (but not taken corresponding to the minimum value) the two angles
should be taken into account simultaneously. The study, described in this paper, is
focused on investigating the interaction between the internal forces that appear in
concrete due to shear bending and the links following the truss design model. It
forms a basis for obtaining the exact angle that defines the direction of inclined
cracks and forces in links within known experimental limits.
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