Response of ultra-high-performance fiber-reinforced concrete beams with continuous steel reinforcement subjected to low-velocity impact loading

Doo Yeol Yoo, Nemkumar Banthia, Sung Wook Kim, Young Soo Yoon

Research output: Contribution to journalArticlepeer-review

89 Citations (Scopus)

Abstract

To investigate the effect of the reinforcement ratio on the flexural behavior of ultra-high-performance fiber-reinforced concrete (UHPFRC) beams under impact loading, a total of four large-sized (200. ×. 270. ×. 2900. mm) beams were fabricated and tested using a drop-weight impact test machine. The incident kinetic energy and impact velocity were 4.2. kJ and 5.6. m/s, respectively. A higher reinforcement ratio exhibited lower maximum and residual deflections and better deflection recovery. The test results also indicate that the maximum crack width at a certain drop stage decreased with the reinforcement ratio. A nonlinear analytical model for predicting the impact behavior of a UHPFRC beam was developed using multi-layer sectional analysis and single-degree-of-freedom analysis, and the model was verified through comparison with the experimental results.

Original languageEnglish
Pages (from-to)233-245
Number of pages13
JournalComposite Structures
Volume126
DOIs
Publication statusPublished - 2015 Aug 1

Keywords

  • Impact
  • Reinforcement ratio
  • Sectional analysis
  • Single-degree-of-freedom
  • Strain rate
  • Ultra-high-performance fiber-reinforced concrete

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Ceramics and Composites

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