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Innovative Model of Precast RC Curved Hybrid Deep Beams Composed Partially with High-Performance Concrete

  • Research Article-Civil Engineering
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Abstract

A novel model of precast hybrid deep beams was proposed. The curved interface was proposed with several compositions of four concrete types. These compositions are based on using the high-performance concrete within effective regions of the beam and that of lower strength in other areas. Fourteen specimens are tested under one-midspan and two-point loading. Results indicated that the curved model using steel fiber concrete-normal strength concrete (SN) and steel fiber concrete-light weight concrete (SL) compositions resulted in improving capacity by 39% and 32% under two point loads and 35% and 23% under one-point loading. For the compositions reactive powder concrete-normal strength concrete (RN) and  reactive powder concrete- light weight concrete (RL), the improvements were 41% and 37% under two-point loading and 42% and 39% under one-point loading. Moreover, significant enhancements in toughness are obtained under two-point loading for specimens composed with  steel fiber concrete (SFC) by (144–260) % and under one-point loading by (66–170)%. For specimens composed with reactive powder concrete (RPC) and tested under two-point loading, the enhancements are (280–300)%, whereas under one-point loading, the enhancement ranged in (131–205)%. Furthermore, significant enhancements in ductility were obtained for SFC compositions under two-point loading in range (39–49)%, while under one-point loading the range was (10–34)%. For the RPC composition, the improvement range was (46–122)% and (18–29)% under the two loading systems, respectively.

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Authors and Affiliations

  1. University of Kufa, Kufa, Iraq

    Qasim M. Shakir & Hawraa K. Hannon

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  1. Qasim M. Shakir
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Correspondence to Qasim M. Shakir.

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Shakir, Q.M., Hannon, H.K. Innovative Model of Precast RC Curved Hybrid Deep Beams Composed Partially with High-Performance Concrete. Arab J Sci Eng 49, 6045–6060 (2024). https://doi.org/10.1007/s13369-023-08592-0

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