Serviceability and moment redistribution of continuous concrete elements reinforced with steel-basalt bars

M. Akiel, T. El-Maaddawy, A. El Refai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The serviceability and moment redistribution of continuous concrete flexural elements internally-reinforced with either basalt fiber-reinforced polymer (BFRP) bars or a combination of steel and BFRP bars are evaluated in this paper. Six two-span concrete specimens were constructed and tested. The specimens were 200 mm deep, 500 mm wide, and 5000 mm long. Each span had a length of 2400 mm. Three specimens were reinforced with BFRP bars only whereas the remaining three specimens were reinforced with hybrid steel-BFRP bars. The specimens had different hogging-to-sagging reinforcement ratios. Specimens reinforced with hybrid steel-BFRP bars were designed in a way to have nominal sagging and hogging moment capacities similar to those of their counterparts reinforced with BFRP bars only. The use of hybrid steel-BFRP reinforcing bars rather than BFRP bars only improved the serviceability performance of continuous concrete elements without compromising their deformational capacity. Specimens reinforced with hybrid steel-BFRP bars exhibited less deflections and smaller crack widths at service load than those of their counterparts reinforced with BFRP bars only. Hybrid-reinforced specimens reached their ultimate loads at deflection values comparable to those of their counterparts reinforced with BFRP bars only. The behavior of the specimens reinforced with BFRP bars only deviated from the elastic response, which resulted in a considerable moment redistribution between the sagging and hogging regions. Specimens reinforced with hybrid steel-BFRP bars exhibited less deviation from the elastic response and lower moment redistribution ratios comparted with those of their counterparts reinforced with BFRP bars only.

Original languageEnglish
Title of host publication9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018
EditorsEmmanuel Ferrier, Karim Benzarti, Jean-Francois Caron
PublisherInternational Institute for FRP in Construction (IIFC)
Pages794-801
Number of pages8
ISBN (Electronic)9780000000002
Publication statusPublished - 2018
Event9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018 - Paris, France
Duration: Jul 17 2018Jul 19 2018

Publication series

Name9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018
Volume2018-July

Conference

Conference9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018
Country/TerritoryFrance
CityParis
Period7/17/187/19/18

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Polymers and Plastics

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