Shear behavior of hybrid seawater sea-sand concrete short beams reinforced with BFRP reinforcements
Shear behavior of hybrid seawater sea-sand concrete short beams reinforced with BFRP reinforcements
复制标题
BFRP筋增强海水-海砂混合混凝土短梁的剪切性能
DOI：
10.1016/j.engstruct.2021.113615
复制
发表时间：
2022-01-08
影响因子：
5.5
通讯作者：
Shao, Xinxing
中科院分区：
文献类型：
--
作者：
Dong, Zhiqiang;Sun, Yu;Shao, Xinxing
提出了一种新型的海水海砂混凝土梁式构件，并进行了试验研究。它采用横向放置的玄武岩纤维增强聚合物（BFRP）网格单元作为剪力箍筋，其底部受拉区由BFRP筋和BFRP包裹钢管（BWST）混合增强。对仅配BFRP格栅箍筋、仅配BWST、BFRP格栅箍筋和BWST配筋的短梁（剪跨比为1.35）的抗剪性能进行了对比试验。根据试验结果建立了有限元模型，并进行了多参数下的数值模拟。结果表明，边墙筋的存在可以提高混合梁的抗剪性能。此外，BFRP格栅箍筋和BWST的组合使用可以实现最佳的整体抗剪性能。这种新型的混合SWSSC梁在未来海洋工程建设中具有广阔的应用前景。
A new type of hybrid seawater sea-sand concrete (SWSSC) beam-type member was proposed and tested in this paper. It adopted transversely placed basalt fiber-reinforced polymer (BFRP) grid units as shear stirrups, and its bottom tensile zone was hybrid reinforced with BFRP bars and a BFRP-wrapped steel tube (BWST). The shear behaviors of short beams (shear span-to-effective depth of 1.35) reinforced in shear with only BFRP grid stirrups, only the BWST, and with both BFRP grid stirrups and the BWST were tested and compared. Besides, a finite element model (FEM) was established based on the test results, and numerical simulations under more parameters were carried out. The results showed that the existence of the BWST can improve the shear resistance of the proposed hybrid SWSSC beams. In addition, the combined use of BFRP grid stirrups and the BWST can achieve the best overall shear performance. This new type of hybrid SWSSC beam has broad application prospects in future ocean engineering construction.