Conclusions
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1.
Experimental investigations established that in reinforced-concrete structural elements with a certain percentage of reinforcement, in zones with structural transverse reinforcement under loads below the standard longitudinal extension cracks of the compressed zone occur, which can lead to a decrease of reliability of the element, and in the presence of block joints in this zone to a decrease of bearing capacity.
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2.
Investigations of the stress state of a reinforced-concrete element with cracks established that the cause of occurrence of longitudinal cracks is the presence of considerable secondary transverse tensile stresses in the zone of the vertex of the normal crack. A physical scheme explaining the occurrence of these stress is presented.
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3.
A method of determining the necessary transverse reinforcement usually installed for structural considerations which is convenient for design was developed. Calculations showed the possibility in many cases of reducing the consumption of structural reinforcement, which is not regulated by existing standards.
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Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 3, pp. 28–33, March, 1986.
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Nikolaev, V.B., Gun, S.Y. & Lisichkin, S.E. Strength of lightly reinforced elements in a compressed zone with- consideration of inelastic deformations of concrete. Hydrotechnical Construction 20, 157–166 (1986). https://doi.org/10.1007/BF01431880
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DOI: https://doi.org/10.1007/BF01431880