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Integrated High-Performance Concrete Beams Reinforced with Hybrid BFRP and Steel Bars

Wang, Xin / Liu, Shui / Shi, Yuwei / Wu, Zhishen / He, Weidong

The flexural behavior of concrete beams reinforced with a combination of basalt fiber–reinforced polymer (BFRP) bars and steel bars is investigated herein. Five hybrid BFRP and steel bar RC beams, one pure BFRP-RC beam, and one pure steel-RC beam, were designed based on the principle of equal stiffness and subject to four-point bending tests. The main study parameters included the bar type, ratio of the steel reinforcement area to the BFRP reinforcement area ( $A_{s} / A_{f}$ ), and BFRP bar diameter. The results of the four-point bending tests showed that the hybrid-RC beams had a lower ultimate load and larger ultimate deflection with the increase in $A_{s} / A_{f}$ . The tested beams had similar stiffnesses before yielding; the five hybrid-RC beams exhibited an obvious postyielding stiffness as well, which contributes to a higher reserve in both strength and deformability. Comparisons between the experimental values and predicted values of ultimate capacity, deflection, and crack width using design models are also presented herein.

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Integrated High-Performance Concrete Beams Reinforced with Hybrid BFRP and Steel Bars

Wang, Xin / Liu, Shui / Shi, Yuwei / Wu, Zhishen / He, Weidong

The flexural behavior of concrete beams reinforced with a combination of basalt fiber–reinforced polymer (BFRP) bars and steel bars is investigated herein. Five hybrid BFRP and steel bar RC beams, one pure BFRP-RC beam, and one pure steel-RC beam, were designed based on the principle of equal stiffness and subject to four-point bending tests. The main study parameters included the bar type, ratio of the steel reinforcement area to the BFRP reinforcement area ( $A_{s} / A_{f}$ ), and BFRP bar diameter. The results of the four-point bending tests showed that the hybrid-RC beams had a lower ultimate load and larger ultimate deflection with the increase in $A_{s} / A_{f}$ . The tested beams had similar stiffnesses before yielding; the five hybrid-RC beams exhibited an obvious postyielding stiffness as well, which contributes to a higher reserve in both strength and deformability. Comparisons between the experimental values and predicted values of ultimate capacity, deflection, and crack width using design models are also presented herein.

Integrated High-Performance Concrete Beams Reinforced with Hybrid BFRP and Steel Bars

Wang, Xin / Liu, Shui / Shi, Yuwei / Wu, Zhishen / He, Weidong

The flexural behavior of concrete beams reinforced with a combination of basalt fiber–reinforced polymer (BFRP) bars and steel bars is investigated herein. Five hybrid BFRP and steel bar RC beams, one pure BFRP-RC beam, and one pure steel-RC beam, were designed based on the principle of equal stiffness and subject to four-point bending tests. The main study parameters included the bar type, ratio of the steel reinforcement area to the BFRP reinforcement area ( $A_{s} / A_{f}$ ), and BFRP bar diameter. The results of the four-point bending tests showed that the hybrid-RC beams had a lower ultimate load and larger ultimate deflection with the increase in $A_{s} / A_{f}$ . The tested beams had similar stiffnesses before yielding; the five hybrid-RC beams exhibited an obvious postyielding stiffness as well, which contributes to a higher reserve in both strength and deformability. Comparisons between the experimental values and predicted values of ultimate capacity, deflection, and crack width using design models are also presented herein.

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Title:

Integrated High-Performance Concrete Beams Reinforced with Hybrid BFRP and Steel Bars

Contributors:

Wang, Xin (author) / Liu, Shui (author) / Shi, Yuwei (author) / Wu, Zhishen (author) / He, Weidong (author)

Published in:

Journal of Structural Engineering ; 148

Publication date:

2021-10-21

ISSN:

0733-9445 , 1943-541X

DOI:

https://doi.org/10.1061/(ASCE)ST.1943-541X.0003207

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

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