الفهرس | Only 14 pages are availabe for public view |
Abstract This research presents an experimental-analytical investigation in the structural behavior of RC fixed-fixed beams strengthened to resist torsion stresses by different schemes of strengthening using CFRP sheets as phase one, as well as investigation of the effect of the change in the longitudinal steel ratio and vertical steel ratio on the resistance of torsion of Beams strengthened with CFRP as phase two. The experimental program consisted of statically testing five medium scale specimens for phase one as well as ten specimens with the same dimensions for phase two. The beams had 150x300 mm rectangular cross-sectional dimensions with overall length of 2000mm over a clear span of 1500 mm. The tested specimens were divided into two phases; phase one consists of one group of beams the first beam (B1) was a control beam while the other four beams (B2,B3,B4,B5) were strengthened in different schemes with CFRP to resist torsion. Phase two consists of three groups of beams each of them discuss the effect of a parameter on the torsional efficiency of RC strengthened beams. The comparison will always take place with beam B1 as a control beam and Beam B3 as the best scheme as concluded from phase one. The latter studies are suggested to aim at developing design oriented guidelines concerning the behavior of RC beams strengthened in torsion by FRP sheets. |