Shear Behaviour of RC Beams Reinforced with Internal Steel Plates Assemblies | ||||
| International Journal of Advances in Structural and Geotechnical Engineering | ||||
| Volume 04, Issue 03, August 2020, Page 60-72 PDF (1.3 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/asge.2020.270800 | ||||
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| Abstract | ||||
| Shear failure in RC beams is brittle sudden one characterized by increased major crack width approaching failure. Thus, in order to improve the shear resistance of RC beams, special configuration of web reinforcement has to be provided in order to limit the crack width as well as to increase its shear capacity. In the current paper, a pre-prepared steel trusses have been configured and assembled using steel strips of 2 mm thickness and then used to enhance both the cracking characteristics and ultimate load capacity. Thus, an experimental program consists of five RC beams have been prepared and tested up to complete shear failure. Test specimens included un-reinforced control beam as well as another beam reinforced for shear by equivalent truss composed of smooth bars of 8 mm diameter simulating the trussed strips. Besides, three beams were reinforced by inclined steel strips, vertical steel strips and trussed steel strips. All steel strips have constant cross-section of 2 mm thickness and 25 mm width. It was found that the beam reinforced by trussed strips showed the outermost shear performance. It showed the highest ultimate capacity as well as the lowest major shear crack width among all specimens. The increases in the ultimate capacity were 79%, 107%, 141% and 129% for beams provided by vertical strips, inclined strips, trussed strips and equivalent trussed bars, respectively, compared to that of control unstrengthened beam. On the other hand, the measured crack width for the major shear crack near failure were about 0.9, 0.8, 0.5 and 0.6 mm, respectively, for beams provided by vertical strips, inclined strips, trussed strips and equivalent trussed bars. | ||||
| Keywords | ||||
| Shear Behavior; Steel Strips; Steel Plate Truss; Experimental Test; Crack Width; RC Beams | ||||
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