TY - JOUR
T1 - Flexural behavior of seawater sea-sand coral concrete–UHPC composite beams reinforced with BFRP bars
AU - Dong, Zhiqiang
AU - Wu, Gang
AU - Zhu, Hong
AU - Zhao, Xiao Ling
AU - Wei, Yang
AU - Qian, Hao
N1 - Funding Information:
The authors would like to acknowledge financial support from the National Natural Science Foundation of China (Grant No: 51908118), Natural Science Foundation of Jiangsu Province (BK20190369 and BK20191146), National Natural Science Foundations of China (Grant No: 51525801, 51838004, and 51778300), the Australian Research Council (ARC) through an ARC Discovery Grant (DP160100739), and the Fundamental Research Funds for the Central Universities (2242020K40087). Thanks to the Jiangsu Green Materials Valley New Material T&D Co. Ltd. (GMV) for providing the BFRP products, and also thanks to the Jiangsu Sobute New Materials Co. Ltd. for providing the raw materials of the UHPC.
Funding Information:
The authors would like to acknowledge financial support from the National Natural Science Foundation of China (Grant No: 51908118 ), Natural Science Foundation of Jiangsu Province ( BK20190369 and BK20191146 ), National Natural Science Foundations of China (Grant No: 51525801 , 51838004 , and 51778300 ), the Australian Research Council (ARC) through an ARC Discovery Grant ( DP160100739 ), and the Fundamental Research Funds for the Central Universities ( 2242020K40087 ). Thanks to the Jiangsu Green Materials Valley New Material T&D Co., Ltd. (GMV) for providing the BFRP products, and also thanks to the Jiangsu Sobute New Materials Co., Ltd. for providing the raw materials of the UHPC.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/12/30
Y1 - 2020/12/30
N2 - A new type of cost-efficient concrete beam that is suitable for island environments, namely, a seawater sea-sand coral concrete (Coral-SWSSC)–ultrahigh-performance concrete (UHPC) composite beam reinforced with basalt fiber-reinforced polymer (BFRP) bars, was proposed in this paper. In these beams, the top 1/8 of the Coral-SWSSC was replaced with UHPC, and both the longitudinal bars and the stirrups were BFRP reinforcements. In addition, a new type of BFRP-wrapped steel tube (BWST) was placed in the tension zone of the beams as additional tensile reinforcement to further increase the performance. The test results showed that compared with the pure BFRP bar-reinforced Coral-SWSSC beams, the new hybrid beams exhibited much better comprehensive bending performance. The ultimate bending capacity, ultimate displacement, and energy consumption were effectively improved by adopting the UHPC replacement layer alone, and the flexural stiffness was improved significantly by adopting the BWST alone. However, when the UHPC replacement layer and the BWST were adopted simultaneously, the abovementioned performance metrics were all improved. The new hybrid beam proposed in this paper has good future application prospects in remote island environments.
AB - A new type of cost-efficient concrete beam that is suitable for island environments, namely, a seawater sea-sand coral concrete (Coral-SWSSC)–ultrahigh-performance concrete (UHPC) composite beam reinforced with basalt fiber-reinforced polymer (BFRP) bars, was proposed in this paper. In these beams, the top 1/8 of the Coral-SWSSC was replaced with UHPC, and both the longitudinal bars and the stirrups were BFRP reinforcements. In addition, a new type of BFRP-wrapped steel tube (BWST) was placed in the tension zone of the beams as additional tensile reinforcement to further increase the performance. The test results showed that compared with the pure BFRP bar-reinforced Coral-SWSSC beams, the new hybrid beams exhibited much better comprehensive bending performance. The ultimate bending capacity, ultimate displacement, and energy consumption were effectively improved by adopting the UHPC replacement layer alone, and the flexural stiffness was improved significantly by adopting the BWST alone. However, when the UHPC replacement layer and the BWST were adopted simultaneously, the abovementioned performance metrics were all improved. The new hybrid beam proposed in this paper has good future application prospects in remote island environments.
KW - Basalt fiber-reinforced polymer (BFRP)
KW - BFRP-wrapped steel tube (BWST)
KW - Flexural behavior
KW - Seawater sea-sand coral concrete (Coral-SWSSC)
KW - Ultrahigh-performance concrete (UHPC)
UR - http://www.scopus.com/inward/record.url?scp=85088915588&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2020.120279
DO - 10.1016/j.conbuildmat.2020.120279
M3 - Journal article
AN - SCOPUS:85088915588
SN - 0950-0618
VL - 265
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 120279
ER -
