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

Authors
Yoo, Doo-YeolBanthia, NemkumarKim, Sung-WookYoon, Young-Soo
Issue Date
8월-2015
Publisher
ELSEVIER SCI LTD
Keywords
Ultra-high-performance fiber-reinforced concrete; Impact; Strain rate; Reinforcement ratio; Sectional analysis; Single-degree-of-freedom
Citation
COMPOSITE STRUCTURES, v.126, pp.233 - 245
Indexed
SCIE
SCOPUS
Journal Title
COMPOSITE STRUCTURES
Volume
126
Start Page
233
End Page
245
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/92826
DOI
10.1016/j.compstruct.2015.02.058
ISSN
0263-8223
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 x 270 x 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. (C) 2015 Elsevier Ltd. All rights reserved.
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Yoon, Young Soo
공과대학 (건축사회환경공학부)
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