Numerical Study of R.C. Beams Strengthening by External Steel Plate
Journal Title: American journal of Engineering Research - Year 2017, Vol 6, Issue 2
Abstract
Steel plates are one of the most common materials for strengthening of reinforced concrete beams; it is very effective for increasing the flexural and shear capacity of reinforced concrete beam. The volume of the infrastructure that needs upgrading, strengthening and/or repair is growing worldwide, this method has gained renaissance in the last decades. This paper presents experimental test data with numerical analyses on the effect of using externally steel plate on its cracking pattern, structural deformations and ultimate strength of concrete beams reinforced. The traditional method use the epoxy glues for interfaces bonding while the idea of this study is effect of steel plate length to effective span of tested beam, effect of steel plate ratio and effect of steel plate position. The experimental work includes flexural testing of 250*150*2500mm concrete beams. Numerical analyses implemented by 3-D Flac program for 13-tested beams also presented. The results show that beams reinforced with external steel plate behave as a composite action right up to ultimate load results show good agreement between the experimental and numerical output data. Using external vertical plate outside of cross section restrains the central deflection with considerable increasing of ultimate load capacity, toughness and ductility of tested beam, using steel plate length to effective span of tested beam has a significant effect on the behavior of tested beams up to 0.6, and with steel plate ratios up to 0.017.
Authors and Affiliations
E. M. Lotfy,, Walid Elkamash
Keywords
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