BFRP−钢复合筋珊瑚海水海砂混凝土梁受剪性能试验与承载力计算

Experimental study on shear behavior and shear capacity calculation of coral seawater sea-sand concrete beams reinforced with BFRP-steel composite bars

摘要

采用远海岛礁属地化材料可以解决远海岛礁工程建设中存在的建筑材料短缺、耐盐蚀能力差、运输成本高等问题，但普通钢筋混凝土构件设计方法适用性未知。本文分别考虑有无腹筋、剪跨比、纵筋配筋率和箍筋间距等参数，设计并制作了 9 根试验梁，开展了配有玄武岩纤维增强复合材料−钢复合纵筋与纤维增强复合材料箍筋的珊瑚海水海砂混凝土梁受剪性能研究，建立了考虑广义纵筋销栓作用的此类有无腹筋梁的受剪承载力计算公式。研究结果表明：配置箍筋可显著提升梁的受剪承载力；在不同剪跨比条件下，此类梁的破坏形态可分为斜压破坏、剪压破坏和斜拉破坏；受剪承载力随剪跨比减小而增大，随纵筋配筋率增大而提高，随箍筋间距增大而降低。通过与现有规范及相关研究结果对比，证实了该计算方法与试验结果吻合较好，可为热带岛礁工程建设中基于属地化材料的珊瑚海水海砂混凝土梁的结构设计提供参考。

Abstract

The use of locally sourced materials from remote offshore island and reef regions can effectively address challenges in island engineering construction, such as shortages of conventional building materials, poor resistance to salt-induced corrosion, and high transportation costs. However, the applicability of conventional structural design methods to such materials remains uncertain. In this study, nine beam specimens were designed and fabricated considering parameters including the presence or absence of web reinforcement, shear span ratio, longitudinal reinforcement ratio, and stirrup spacing. Experimental investigations were conducted on the shear behavior of coral seawater sea-sand concrete (CSSC) beams reinforced with basalt fiber-reinforced polymer (BFRP)-steel composite longitudinal bars and BFRP stirrups. A shear capacity prediction model incorporating the generalized dowel action of longitudinal reinforcement was proposed for such beams, both with and without web reinforcement. The results indicate that providing stirrups significantly enhances the shear capacity of the beams. Depending on the shear span ratio, the failure modes can be classified as diagonal compression failure, shear-compression failure, or diagonal tension failure. The shear capacity increases with decreasing shear span ratio and increasing longitudinal reinforcement ratio, while it decreases with increasing stirrup spacing. Comparisons with existing design codes and relevant research results demonstrate that the proposed calculation method agrees well with the experimental data. These findings provide a useful reference for the structural design of CSSC beams using locally sourced materials in tropical island and reef engineering construction.

关键词

热带岛礁属地化材料 / 珊瑚海水海砂混凝土 / BFRP−钢复合筋 / 梁受剪性能 / 受剪承载力

Key words

tropical island and reef localization materials / coral seawater sea-sand concrete / BFRP-steel composite bars / shear behavior of beams / shear capacity

作者贡献声明

刘豫安负责设计实验方案、试验进行、数据采集、数据分析及撰写初稿等。张海滨、孙天舒和赵菲负责对论文提出关键修改意见、逻辑调整等。周智负责提供学术指导、方向把握、提供实验设备、经费支持等。

AI使用声明

本文的英文题名、摘要和关键词采用DeepSeek-V3.2翻译生成，并进行了部分修改。

利益冲突声明

作者声明，不存在已知的可能影响本论文所报告工作的竞争性经济利益或个人关系。

伦理声明

不适用：本文不涉及人类或动物研究。

数据可用性

支持论文结论所需的所有数据均已包含在稿件和/或电子补充材料中。如需获取与本文相关的其他数据，可向通信作者提出申请。

参考文献

[1] Shalon R, Rapheal M . Influence of sea water on corrosion of reinforcement[J]. ACI Journal Proceedings, 1959, 55(6): 1251-1268.

[2] 尹世平, 华云涛, 徐世烺 . FRP 配筋混凝土结构研究进展及其应用[J]. 建筑结构学报, 2021, 42(1): 134-150.

[3] Yin S P, Hua Y T, Xu S L . A review on research progress and application of concrete structures internally reinforced with FRP bars[J]. Journal of Building Structures, 2021, 42(1): 134-150.

[4] Wu G, Wu Z S, Luo Y B, et al. Mechanical properties of steel—FRP composite bar under uniaxial and cyclic tensile loads[J]. Journal of Materials in Civil Engineering, 2010, 22(10): 1056-1066.

[5] Wu G, Sun Z Y, Wu Z S, et al. Mechanical properties of steel—FRP composite bars (SFCBs) and performance of SFCB reinforced concrete structures[J]. Advances in Structural Engineering, 2012, 15(4): 625-635.

[6] 秦卫红, 惠卓, 张普, 等 . 钢−纤维复合纵筋和玄武岩纤维复合纵筋混凝土梁受剪承载力试验研究[J]. 建筑结构学报, 2022, 43(11): 209-220.

[7] Qin W H, Hui Z, Zhang P, et al. Experimental study on shearing capacity of concrete beams longitudinal reinforced with steel fiber composite bars and BFRP bars[J]. Journal of Building Structures, 2022, 43(11): 209-220.

[8] 周锐, 朱德举 . 玄武岩纤维复材筋海水海砂混凝土梁抗剪性能[J]. 铁道科学与工程学报, 2023, 20(9): 3396-3405.

[9] Zhou R, Zhu D J . Shear behavior of BFRP bars reinforced seawater sea—sand concrete beam[J]. Journal of Railway Science and Engineering, 2023, 20(9): 3396-3405.

[10] Han S W, Fan C, Zhou A, et al. Shear behavior of concrete beams reinforced with corrosion—resistant and ductile longitudinal steel—FRP composite bars and FRP stirrups[J]. Engineering Structures, 2023, 278: 115520.

[11] 马林建, 罗棕木, 段力群, 等 . 全珊瑚混凝土的脆性评价[J]. 中国矿业大学学报, 2021, 50(2): 281-288.

[12] Ma L J, Luo Z M, Duan L Q, et al. Brittleness evaluation of coral concrete[J]. Journal of China University of Mining & Technology, 2021, 50(2): 281-288.

[13] 高屹, 韦灼彬, 孙潇 . 珊瑚骨料混凝土基本力学性能试验研究[J]. 海军工程大学学报, 2017, 29(1): 64-68.

[14] Gao Y, Wei Z B, Sun X . Experimental research on basic mechanical properties of coral aggregate concrete[J]. Journal of Naval University of Engineering, 2017, 29(1): 64-68.

[15] Zhao Y F, Hu X, Shi C J, et al. A review on seawater sea—sand concrete: mixture proportion, hydration, microstructure and properties[J]. Construction and Building Materials, 2021, 295: 123602.

[16] 连金龙 . FRP 筋增强海砂混凝土梁耐腐蚀性能试验研究[D]. 南京: 东南大学, 2017.

[17] Lian J L . Experimental research on durability of FRP reinforced sea sand concrete beams[D]. Nanjing: Southeast University, 2017.

[18] GB 50608— 2020 纤维增强复合材料工程应用技术标准[S].

[19] GB 50608— 2020 Technical standard for fiber reinforced polymer (FRP) in construction[S].

[20] Sharif H H, Mahmood A D . Shear performance of sustainable BFRP—reinforced concrete beams with stirrup incorporating recycled plastic aggregates: experimental and analytical investigations[J]. Construction and Building Materials, 2025, 503: 144530.

[21] Zhao W L, Xu J J, Pan K M, et al. Experimental study on shear behavior of steel fiber high strength concrete beams reinforced with GFRP bars[J]. Engineering Structures, 2025, 323: 119294.

[22] Liang X Z, Li J Q, Li Z W, et al. Shear behavior of BFRP—reinforced SSC beams using U—shaped SSECC with embedded longitudinal bars: experimental investigation and predictive modeling[J]. Construction and Building Materials, 2025, 504: 144564.

[23] GB/T 50152— 2012 混凝土结构试验方法标准[S].

[24] GB/T 50152— 2012 Standard for test method of concrete structures[S].

[25] GB 50010— 2010 混凝土结构设计标准[S].

[26] GB 50010— 2010 Code for design of concrete structures[S].

[27] 孙训方, 方孝淑, 关来泰 . 材料力学(I)[M]. 6版. 北京: 高等教育出版社, 2019: 246-247.

[28] 林红威, 渠海东, 杨家琦, 等 . FRP 筋剪切−拉伸强度关系研究[J]. 复合材料学报, 2026, 43(2): 961-977.

[29] Lin H W, Qu H D, Yang J Q, et al. Investigation on the relationship between the transverse shear strength and tensile strength of FRP bars[J]. Acta Materiae Compositae Sinica, 2026, 43(2): 961-977.

[30] 曹晓峰, 赵文, 谢强, 等 . BFRP 筋材基本力学性能试验研究[J]. 公路工程, 2016, 41(5): 215-217, 255.

[31] Cao X F, Zhao W, Xie Q, et al. Experimental study on mechanical properties of basalt fiber reinforced plastic rebar[J]. Highway Engineering, 2016, 41(5): 215-217, 255.

[32] Yi Y, Guo S C, Li S, et al. Effect of alkalinity on the shear performance degradation of basalt fiber—reinforced polymer bars in simulated seawater sea sand concrete environment[J]. Construction and Building Materials, 2021, 299: 123957.

[33] Wang Z K, Zhao X L, Xian G J, et al. Long—term durability of basalt—and glass—fibre reinforced polymer (BFRP/GFRP) bars in seawater and sea sand concrete environment[J]. Construction and Building Materials, 2017, 139: 467-489.

[34] 郑百林, 李伟, 张伟伟, 等 . 增强混凝土中 FRP 包覆筋研究Ⅱ: 力学性能测试[J]. 复合材料学报, 2004, 21(3): 79-83.

[35] Zheng B L, Li W, Zhang W W, et al. Mechanics behavior of FRP wrapped rebar reinforced concrete Ⅱ: mechanic tests[J]. Acta Materiae Compositae Sinica, 2004, 21(3): 79-83.

[36] 倪林 . B−FRPB 混凝土梁及 B−SFCB 混凝土梁的受剪性能研究[D]. 镇江: 江苏大学, 2020.

[37] Ni L. Study on the shear behavior of B—FRPB and B—SFCB concrete beam[D]. Zhenjiang: Jiangsu University, 2020.

[38] 范旭红, 倪林, 秦卫红, 等 . 钢玄武岩纤维复合筋混凝土梁受剪承载力试验研究[J]. 土木与环境工程学报(中英文), 2021, 43(2): 112-122.

[39] Fan X H, Ni L, Qin W H, et al. Experimental study on shear capacity of steel—basalt fiber composite bar (SFCB) reinforced concrete beams[J]. Journal of Civil and Environmental Engineering, 2021, 43(2): 112-122.

[40] 游颖骏 . 钢筋−连续玄武岩纤维复合筋(SFCB)混凝土梁抗剪性能研究[D]. 南京: 东南大学, 2021.

[41] You Y J . Study on shear behavior of concrete beams reinforced with steel—fiber composite bar (SFCB)[D]. Nanjing: Southeast University, 2021.

[42] 达波, 孙凯, 吴彰钰, 等 . 不同种类钢筋珊瑚混凝土梁的抗剪性能试验研究和数值分析[J]. 工程科学学报, 2025, 47(11): 2247-2256.

[43] Da B, Sun K, Wu Z Y, et al. Experimental study and numerical analysis on shear behavior of coral aggregate concrete beams with different types of steel bar[J]. Chinese Journal of Engineering, 2025, 47(11): 2247-2256.