Flexural Response and Moment Redistribution of RC Continuous T-Beams Strengthened With FRP or Steel Bars | ||||
| International Journal of Advances in Structural and Geotechnical Engineering | ||||
| Volume 03, Issue 04 - Serial Number 3062019, November 2019, Page 74-90 PDF (2.11 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/asge.2019.271031 | ||||
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| Abstract | ||||
| This paper is an experimental study to investigate the behavior of the RC continuous T-beams strengthened with NSM CFRP or steel bars under static loads. The experimental program consists of five RC continuous T-beams with overall dimensions equal to (200*300*4300) mm and with constant load (120kN) at the central loaded column. The first one was unstrengthened control beam designed to fail in flexure. Two beams were strengthened at the hogging region by using CFRP or steel bars, the other beams were strengthened at the mid-span region. The effect of strengthening material type and region on the load carrying capacity of the beams, deformation, ductility index and moment redistribution were investigated. Test results revealed that, three failure modes of beams were observed, namely the steel yielding, crushing of the concrete after steel yielding, end anchorage separation before the steel yielding at the strengthening region. The ductility of all strengthened beams was reduced compared with that of the respective unstrengthened control beam. The moment redistribution ratio depends deeply on the internal force at the main sagging reinforcement | ||||
| Keywords | ||||
| Continuous beams; NSM bars; CFRP bars; strengthening; Serviceability | ||||
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