Flexural behavior of seawater sea-sand concrete beams reinforced with BFRP bars/grids and BFRP-wrapped steel tubes

Zhiqiang Dong; Yu Sun; Gang Wu; Hong Zhu; Xiao Ling Zhao; Yang Wei; Pu Zhang

doi:10.1016/j.compstruct.2021.113956

Flexural behavior of seawater sea-sand concrete beams reinforced with BFRP bars/grids and BFRP-wrapped steel tubes

Zhiqiang Dong, Yu Sun, Gang Wu, Hong Zhu, Xiao Ling Zhao, Yang Wei, Pu Zhang

Research output: Journal article publication › Journal article › Academic research › peer-review

34 Citations (Scopus)

Abstract

This paper presents an investigation of a new type of seawater sea-sand concrete (SWSSC) beam which consists of BFRP bars/grids and BFRP-wrapped steel tubes (BWST). The transversally placed basalt fiber-reinforced polymer (BFRP) grid units act as shear stirrups, while the longitudinal BWST near the bottom area is used to improve the tension resistance. The flexural behavior of the hybrid SWSSC beams under different BFRP reinforcement ratios with or without the BWST were experimentally tested and compared. In addition, a finite element model (FEM) was established and a parametric study was conducted to show the influence of key parameters. The results showed that the placement of the BWST could significantly improve the mechanical properties of the hybrid beams, especially in terms of improving the flexural stiffness and reducing crack width. In addition, the full-length embedded BWST could shorten the height of the vertical cracks developed along the FRP grids, and denser diagonal cracks developed in the shear span.

Original language	English
Article number	113956
Journal	Composite Structures
Volume	268
DOIs	https://doi.org/10.1016/j.compstruct.2021.113956
Publication status	Published - 15 Jul 2021
Externally published	Yes

Keywords

Basalt fiber-reinforced polymer (BFRP) bar
BFRP grid
BFRP-wrapped steel tube (BWST)
Flexural behavior
Seawater sea-sand concrete (SWSSC)

ASJC Scopus subject areas

Ceramics and Composites
Civil and Structural Engineering

More information

10.1016/j.compstruct.2021.113956

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title = "Flexural behavior of seawater sea-sand concrete beams reinforced with BFRP bars/grids and BFRP-wrapped steel tubes",

abstract = "This paper presents an investigation of a new type of seawater sea-sand concrete (SWSSC) beam which consists of BFRP bars/grids and BFRP-wrapped steel tubes (BWST). The transversally placed basalt fiber-reinforced polymer (BFRP) grid units act as shear stirrups, while the longitudinal BWST near the bottom area is used to improve the tension resistance. The flexural behavior of the hybrid SWSSC beams under different BFRP reinforcement ratios with or without the BWST were experimentally tested and compared. In addition, a finite element model (FEM) was established and a parametric study was conducted to show the influence of key parameters. The results showed that the placement of the BWST could significantly improve the mechanical properties of the hybrid beams, especially in terms of improving the flexural stiffness and reducing crack width. In addition, the full-length embedded BWST could shorten the height of the vertical cracks developed along the FRP grids, and denser diagonal cracks developed in the shear span.",

keywords = "Basalt fiber-reinforced polymer (BFRP) bar, BFRP grid, BFRP-wrapped steel tube (BWST), Flexural behavior, Seawater sea-sand concrete (SWSSC)",

author = "Zhiqiang Dong and Yu Sun and Gang Wu and Hong Zhu and Zhao, {Xiao Ling} and Yang Wei and Pu Zhang",

note = "Funding Information: The authors would like to acknowledge financial support from the Natural Science Foundation of Jiangsu Province ( BK20190369 and BK20191146 ), the National Natural Science Foundation of China (Grant Nos: 51908118 , 51838004 , and 52078127 ), and the “Zhishan” Scholars Programs of Southeast University. Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

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doi = "10.1016/j.compstruct.2021.113956",

language = "English",

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T1 - Flexural behavior of seawater sea-sand concrete beams reinforced with BFRP bars/grids and BFRP-wrapped steel tubes

AU - Dong, Zhiqiang

AU - Sun, Yu

AU - Wu, Gang

AU - Zhu, Hong

AU - Zhao, Xiao Ling

AU - Wei, Yang

AU - Zhang, Pu

N1 - Funding Information: The authors would like to acknowledge financial support from the Natural Science Foundation of Jiangsu Province ( BK20190369 and BK20191146 ), the National Natural Science Foundation of China (Grant Nos: 51908118 , 51838004 , and 52078127 ), and the “Zhishan” Scholars Programs of Southeast University. Publisher Copyright: © 2021 Elsevier Ltd

PY - 2021/7/15

Y1 - 2021/7/15

N2 - This paper presents an investigation of a new type of seawater sea-sand concrete (SWSSC) beam which consists of BFRP bars/grids and BFRP-wrapped steel tubes (BWST). The transversally placed basalt fiber-reinforced polymer (BFRP) grid units act as shear stirrups, while the longitudinal BWST near the bottom area is used to improve the tension resistance. The flexural behavior of the hybrid SWSSC beams under different BFRP reinforcement ratios with or without the BWST were experimentally tested and compared. In addition, a finite element model (FEM) was established and a parametric study was conducted to show the influence of key parameters. The results showed that the placement of the BWST could significantly improve the mechanical properties of the hybrid beams, especially in terms of improving the flexural stiffness and reducing crack width. In addition, the full-length embedded BWST could shorten the height of the vertical cracks developed along the FRP grids, and denser diagonal cracks developed in the shear span.

AB - This paper presents an investigation of a new type of seawater sea-sand concrete (SWSSC) beam which consists of BFRP bars/grids and BFRP-wrapped steel tubes (BWST). The transversally placed basalt fiber-reinforced polymer (BFRP) grid units act as shear stirrups, while the longitudinal BWST near the bottom area is used to improve the tension resistance. The flexural behavior of the hybrid SWSSC beams under different BFRP reinforcement ratios with or without the BWST were experimentally tested and compared. In addition, a finite element model (FEM) was established and a parametric study was conducted to show the influence of key parameters. The results showed that the placement of the BWST could significantly improve the mechanical properties of the hybrid beams, especially in terms of improving the flexural stiffness and reducing crack width. In addition, the full-length embedded BWST could shorten the height of the vertical cracks developed along the FRP grids, and denser diagonal cracks developed in the shear span.

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KW - BFRP grid

KW - BFRP-wrapped steel tube (BWST)

KW - Flexural behavior

KW - Seawater sea-sand concrete (SWSSC)

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Flexural behavior of seawater sea-sand concrete beams reinforced with BFRP bars/grids and BFRP-wrapped steel tubes

Abstract

Keywords

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