Flexural response of geopolymer and fiber reinforced geopolymer concrete beams reinforced with GFRP bars and strengthened using CFRP sheets
| Autor: | Salah Altoubat, Abdalla Elbana, M. Talha Junaid |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Carbon fiber reinforced polymer
Materials science 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Building and Construction Fibre-reinforced plastic 0201 civil engineering Geopolymer Cracking Flexural strength 021105 building & construction Architecture Fiber Composite material Safety Risk Reliability and Quality Reinforcement Elastic modulus Civil and Structural Engineering |
| Zdroj: | Structures. 24:666-677 |
| ISSN: | 2352-0124 |
| DOI: | 10.1016/j.istruc.2020.02.003 |
| Popis: | This experimental work presents the flexural response, before and after strengthening, of Geopolymer concrete beams reinforced with Glass Fiber Reinforced Polymer (GFRP) bars as main and only reinforcement. A total of nine beams were subjected to quasi-static four-point flexural tests. Four beams were used as a reference, while the other beams were substantially damaged by loading up to 50% of their load capacities and then repaired and strengthened using Carbon Fiber Reinforced Polymer (CFRP) sheets. Subsequently load bearing capacities, strain development, and load-deflection relationship are reported while failure modes and cracking patterns are also observed. The ACI 440-R1-06 equations were found to give conservative estimates for the flexural capacity of un-strengthened geopolymer beams, and thus can be adopted for such concretes. The CFRP strengthening restored the capacity of the damaged beams without increasing the load carrying capacity of such systems due to elastic modulus incompatibility between the GFRP and CFRP material. |
| Databáze: | OpenAIRE |
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