Punching shear behavior of two-way coral-reef-sand concrete slab reinforced with BFRP composites

被引：18

作者：

Wang, Xin ^{[1
]}

Zhang, Xiaofei ^{[1
]}

Ding, Lining ^{[2
]}

Tang, Jie ^{[1
,3
]}

Wu, Zhishen ^{[1
]}

机构：

[1] Southeast Univ, Key Lab C&PC Struct, Minist Educ, Nanjing 210096, Peoples R China

[2] Nanjing Forestry Univ, Sch Civil Engn, Nanjing 210037, Peoples R China

[3] CIFI Holdings Grp Co Ltd, Shanghai 200000, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 231卷

基金：

美国国家科学基金会;

关键词：

Coral reef sand concrete; BFRP; Two-way slab; Punching capacity; Design; BARS;

D O I：

10.1016/j.conbuildmat.2019.117113

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The basic mechanical properties of coral reef sand (CRS) concrete and the punching shear behavior of two-way CRS concrete slab reinforced with basalt fiber-reinforced polymer (BFRP) composites including bars and grids were investigated. A total of 54 CRS concrete cubes were designed for compression tests. The test parameters include water-cement ratio, cement grade, and aggregate gradation. Further, five two-way CRS concrete slabs reinforced with steel/BFRP bars/BFRP grids were produced to investigate the failure modes, the effects of the BFRP reinforcement ratio and type on the punching behavior. Finally, the punching capacities of the BFRP-reinforced CRS concrete slabs were predicted with different models. The results shows that the CRS concrete fails in the fracture of the coral reef aggregates. Compared with the steel-reinforced slab, no evident punching surface appears during the failure of the BFRP-reinforced slabs. The BFRP grid-reinforced slab exhibits a higher post-cracking stiffness and lower energy consumption than the BFRP bar-reinforced slab owing to the integrity of the BFRP grid. Moreover, the models of CAN/CSA S806-12 and EI-Gamal et al. (2005) reasonably predict the punching capacities of two-way CRS concrete slabs reinforced with BFRP. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：15

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