Abstract
This paper briefly describes commonly used methods of determination of shear strength of reinforced concrete beams. Classical method, Eurocode 2 approach and most complex approach proposed by P. D. Zararis in a series of papers are depicted and compared. Experimental tests of RC beams shown in the subsequent paper (Part II) are confronted with the model predictions.
Highlights
Theoretical models used in structural design should be able to estimate element strength in the way, which is both simple and general
Eurocode approach to determination of shear strength in reinforced concrete (RC) beams evolved from methods based on the truss analogy [3,4,5]
Shear strength is defined by three conditions, determining ultimate shear force: due to strength of beam without shear reinforcement, due to stirrups strength and due to strength of concrete struts subjected to compressive stress: VEd max [( cRmdin,c k(100 L fck )1/ k1 cp )bwd k1 cp ]bwd
Summary
Theoretical models used in structural design should be able to estimate element strength in the way, which is both simple and general. They have to find correspondence with the real structure behaviour under variety of load cases. Despite of numerous theoretical research and experimental results, the issue of shear failure in beams and other reinforced concrete (RC) elements remains unresolved completely. The problem is complicated due to multiaxial and inhomogeneous stress distribution in RC elements. Analytical formulas based on simple models, which could predict element capacity precisely enough, have not yet been formulated. In this paper three models of shear capacity determination are presented.
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