THE ADVANTAGE OF INSTALLING HELIX CONFINEMENT IN OVER REINFORCED HSC BEAMS | ||||
| ERJ. Engineering Research Journal | ||||
| Article 7, Volume 33, Issue 3, July 2010, Page 239-244 PDF (236.03 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/erjm.2010.67325 | ||||
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| Author | ||||
| Nuri Mohamed Elbasha | ||||
| 7th of April University, Faculty of Engineering (Regdalien), Libya | ||||
| Abstract | ||||
| The ductility of over reinforced HSC beams is enhanced through the application of helical reinforcement located in the compression region. The pitch of helix is an important parameter controlling the level of strength and ductility enhancement. This paper presents an experimental investigation of the effect of helices on the behavior of over reinforced high strength concrete beams through testing ten helically confined full scale beams. The helix pitches were 25, 50, 75, 100 and 160 mm. Beams’ cross section was 200´300 mm, and with a length of 4 m and a clear span of 3.6 m subjected to four point loading. The main results indicate that helix effectiveness is negligible when the helical pitch is 160 mm (helix diameter), the concrete cover spalling off load increases linearly as the helical pitch increases and the proof that the helical confinement in the compression zone of HSC beam is economical. | ||||
| Keywords | ||||
| High strength; RC beams; Over reinforcement; Confinement; Ductility | ||||
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