Abstract
Strengthening of concrete beams, limited by shear resistance, is one possibility how to extend life span of a structure. Application of a vertical prestressed shear reinforcement is an efficient way how to increase the shear resistance of concrete beam. Unfortunately, current codes lack the information how to design optimal amount of the vertical prestressed shear reinforcement and how to assess retrofitted structure. In this paper, applicability of various codes of practise is assessed as option for design of vertical prestresses shear reinforcement. The presented models are compared with test data available in literature. The results of this paper show that presented models provide un-conservative approach for assessment of reinforced concrete structure strengthened by vertical prestressed shear reinforcement with the space for improvement.
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