BFRP筋碱激发海砂混凝土梁抗弯性能研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (12): 4242-4253.

BFRP筋碱激发海砂混凝土梁抗弯性能研究

范小春^1,2, 崔祺^1,2, 张澳¹, 王文琦³

1.武汉理工大学土木工程与建筑学院,武汉 430070;
2.武汉理工大学三亚科教创新园,三亚 572000;
3.基准方中建筑设计股份有限公司,武汉 430070

收稿日期:2023-07-21 修订日期:2023-10-03 出版日期:2023-12-15 发布日期:2023-12-12
通信作者: 崔祺,硕士研究生。E-mail:354330207@qq.com
作者简介:范小春(1975—),男,博士,教授。主要从事新型混凝土材料与结构方面的研究。E-mail:fxcfree@126.com
基金资助:
国家自然科学基金(41972271);武汉理工大学三亚科教园开放基金(2021KF0001);海洋建筑智能建造技术研发(ZDKJ2021024)

Bending Performance of BFRP Bars Alkali-Activated Sea Sand Concrete Beams

FAN Xiaochun^1,2, CUI Qi^1,2, ZHANG Ao¹, WANG Wenqi³

1. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China;
2. Sanya Science and Education Innovation Park, Wuhan University of Technology, Sanya 572000, China;
3. Benchmark Fangzhong Architectural Design Co., Ltd., Wuhan 430070, China

Received:2023-07-21 Revised:2023-10-03 Online:2023-12-15 Published:2023-12-12

摘要/Abstract

摘要： 本文提出了一种玄武岩筋碱激发海砂混凝土(BASC)梁的新型材料结构构件。为了研究BASC梁抗弯性能,制作了5根混凝土梁,研究了玄武岩筋(BFRP)配筋率和不同筋材类型对碱激发海砂混凝土(ASC)梁抗弯性能和破坏模式的影响。试验结果表明: BASC梁配筋率的提升对开裂荷载影响不大,但却能有效提高其极限荷载。以0.27%配筋率为参照组,当配筋率提高至0.48%、0.75%、1.08%时,BASC梁的极限承载力分别提高了109.46%、119.60%和189.66%。与普通钢筋相比,BFRP筋弹性模量较小,配筋率相同的情况下,普通钢筋ASC梁的开裂荷载比BASC梁大50%。本文提出了正截面抗弯承载力、最大裂缝宽度和挠度的理论计算模型,由于受到ASC中氯离子扩散的影响,需要对计算模型进行修正,拟合后BASC梁的计算值与试验值吻合较好,可为BASC梁在海洋工程中的应用提供参考。

关键词: BFRP筋, 碱激发海砂混凝土, 抗弯性能, 正截面承载力计算, 破坏形态, 海洋工程

Abstract: In this paper, a new type of material structural member of basalt bar alkali-activated sea sand concrete (BASC) beam was proposed. In order to study the bending performance of BASC beams, five concrete beams were fabricated. The effects of basalt fiber reinforced polymer (BFRP) reinforcement ratio and different reinforcement types on the bending performance and failure modes of alkali-activated sea sand concrete (ASC) beams were studied. The test results show that the increase of the reinforcement ratio of BASC beams has little effect on the cracking load, but it can effectively improve its ultimate load. Taking the reinforcement ratio of 0.27% as the reference group, when the reinforcement ratio increases to 0.48%, 0.75% and 1.08%, the ultimate bearing capacity of BASC beams increases by 109.46%, 119.60% and 189.66%, respectively. Compared with ordinary steel bars, the elastic modulus of BFRP bars is smaller. With the same reinforcement ratio, the cracking load of ordinary steel bar ASC beams is 50%, larger than that of BASC beams. The theoretical calculation models of bending capacity, maximum crack width and deflection of normal section are proposed. Due to the influence of chloride ion diffusion in ASC, the calculation model needs to be modified. The calculated values of BASC beams after fitting are in good agreement with the experimental values, which can provide reference for the application of BASC beams in ocean engineering.

Key words: BFRP bar, alkali-activated sea sand concrete, bending performance, calculation of normal section bearing capacity, broken form, ocean engineering

中图分类号:

TU528

范小春, 崔祺, 张澳, 王文琦. BFRP筋碱激发海砂混凝土梁抗弯性能研究[J]. 硅酸盐通报, 2023, 42(12): 4242-4253.

FAN Xiaochun, CUI Qi, ZHANG Ao, WANG Wenqi. Bending Performance of BFRP Bars Alkali-Activated Sea Sand Concrete Beams[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(12): 4242-4253.

参考文献

[1] 曹石, 吴庆, 蔡成功, 等. FRP纤维增强珊瑚混凝土基本性能研究[J]. 混凝土, 2023(2): 168-171.
CAO S, WU Q, CAI C G, et al. Research on the basic performance of FRP fiber reinforced coral concrete[J]. Concrete, 2023(2): 168-171 (in Chinese).
[2] AHMED A, GUO S C, ZHANG Z H, et al. A review on durability of fiber reinforced polymer (FRP) bars reinforced seawater sea sand concrete[J]. Construction and Building Materials, 2020, 256: 119484.
[3] FANG Y, CHEN B, ODERJI S Y. Experimental research on magnesium phosphate cement mortar reinforced by glass fiber[J]. Construction and Building Materials, 2018, 188: 729-736.
[4] XU J, YAO W, WANG R Q. Nonlinear conduction in carbon fiber reinforced cement mortar[J]. Cement and Concrete Composites, 2011, 33(3): 444-448.
[5] 王钧, 马跃, 张野, 等. 短切玄武岩纤维混凝土力学性能试验与分析[J]. 工程力学, 2014, 31(增刊1): 99-102+114.
WANG J, MA Y, ZHANG Y, et al. Experimental research and analysis on mechanical properties of chopped basalt fiber reinforced concrete[J]. Engineering Mechanics, 2014, 31(supplement 1): 99-102+114 (in Chinese).
[6] ELGABBAS F, AHMED E A, BENMOKRANE B. Physical and mechanical characteristics of new basalt-FRP bars for reinforcing concrete structures[J]. Construction and Building Materials, 2015, 95: 623-635.
[7] MOHAMED O A, AL HAWAT W, KESHAWARZ M. Durability and mechanical properties of concrete reinforced with basalt fiber-reinforced polymer (BFRP) bars: towards sustainable infrastructure[J]. Polymers, 2021, 13(9): 1402.
[8] DONG Z Q, WU G, ZHU H, et al. Bond and flexural performance of basalt fiber-reinforced polymer bar-reinforced seawater sea sand glass aggregate concrete beams[J]. Advances in Structural Engineering, 2021, 24(15): 3359-3374.
[9] HUA Y T, YIN S P, WANG Z H. Analysis of influence factors on interfacial bond between BFRP bars and seawater sea-sand concrete[J]. Journal of Reinforced Plastics and Composites, 2021, 40(1/2): 16-28.
[10] 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/OL]. 铁道科学与工程学报: 1-11[2023-07-18]. https://doi.org/10.19713/j.cnki.43-1423/u.T20221927.
ZHOU R, ZHU D J. Basalt fiber composites reinforced the sea sand concrete beam shear resistance[J/OL]. Journal of railway science and engineering: 1-11[2023-07-18]. https://doi.org/10.19713/j.cnki.43-1423/u.T20221927 (in Chinese).
[11] HUA Y T, YIN S P, PENG Z T. Crack development and calculation method for the flexural cracks in BFRP reinforced seawater sea-sand concrete (SWSSC) beams[J]. Construction and Building Materials, 2020, 255: 119328.
[12] 陆春华, 平安, 延永东, 等. 高温作用后GFRP/BFRP筋拉伸性能试验研究及强度折减计算[J]. 哈尔滨工程大学学报, 2023, 44(3): 443-449.
LU C H, PING A, YAN Y D, et al. Experimental study on the tensile properties and strength reduction calculation of GFRP/BFRP reinforcements after high-temperature treatments[J]. Journal of Harbin Engineering University, 2023, 44(3): 443-449 (in Chinese).
[13] LU Z Y, SU L Z, XIAN G J, et al. Durability study of concrete-covered basalt fiber-reinforced polymer (BFRP) bars in marine environment[J]. Composite Structures, 2020, 234: 111650.
[14] 伍志元, 蒋昌波, 陈杰, 等. 高强度扰动下海岸动力地貌特征研究进展[J]. 水科学进展, 2023, 34(2): 310-320.
WU Z Y, JIANG C B, CHEN J, et al. Coastal dynamic geomorphology under high intensity disturbance: research progress and perspectives[J]. Advances in Water Science, 2023, 34(2): 310-320 (in Chinese).
[15] 陈宗平, 黎盛欣, 周济, 等. 海洋环境GFRP筋海水海砂混凝土梁受力性能试验及承载力计算[J]. 材料导报, 2023, 56(20): 1-18.
Chen Z P, Li S X, Zhou J, et al. Mechanical performance test and bearing capacity calculation of GFRP reinforced seawater and sea sand concrete beams in ocean environment[J]. Material introduction, 2023, 56(20): 1-18 (in Chinese).
[16] 郑宏宇, 黄志勇, 袁世杰, 等. BFRP筋增强海水海砂混凝土短柱偏心受压性能[J]. 中国科技论文, 2022, 17(12): 1332-1339.
ZHENG H Y, HUANG Z Y, YUAN S J, et al. Eccentric compression behavior of short concrete columns reinforced with BFRP bars in seawater and sea sand[J]. China Sciencepaper, 2022, 17(12): 1332-1339 (in Chinese).
[17] YANG S T, XU J J, ZANG C H, et al. Mechanical properties of alkali-activated slag concrete mixed by seawater and sea sand[J]. Construction and Building Materials, 2019, 196: 395-410.
[18] 杨志辉. 碱激发混凝土抗氯离子侵蚀长期性能的研究[D]. 广州: 广州大学, 2021.
YANG Z H. Study on long-term resistance of alkali-activated concrete to chloride ion corrosion[D]. Guangzhou: Guangzhou University, 2021 (in Chinese).
[19] 中华人民共和国住房和城乡建设部, 国家市场监督管理总局. 混凝土物理力学性能试验方法标准: GB/T 50081—2019[S]. 北京: 中国建筑工业出版社, 2019.
Ministry of Construction of the People’s Republic of China, State Administration for Market Supervision. Standard for test method for physical and mechanical properties of concrete: GB/T 50081—2019[S]. Beijing: China Construction Industry Press, 2019 (in Chinese).
[20] 高先建. 玄武岩纤维增强复合锚杆支护土质边坡设计方法的试验研究[D]. 成都: 西南交通大学, 2017.
GAO X J. Experimental study on design method of soil slope supported by basalt fiber reinforced composite anchor rod[D]. Chengdu: Southwest Jiaotong University, 2017 (in Chinese).
[21] 中华人民共和国住房和城乡建设部. 混凝土结构试验方法标准: GB/T 50152—2012[S]. 北京: 中国建筑工业出版社, 2012.
Ministry of Construction of the People’s Republic of China. Standard for test methods of concrete structures: GB/T 50152—2012[S]. Beijing: China Building Industry Press, 2012 (in Chinese).
[22] 中华人民共和国住房和城乡建设部. 纤维增强复合材料工程应用技术标准: GB 50608—2020[S]. 北京: 中国计划出版社, 2020.
Ministry of Construction of the People’s Republic of China. Technical standard for engineering application of fiber reinforced composites: GB 50608—2020[S]. Beijing: China Plan Publishing House, 2020 (in Chinese).
[23] 中华人民共和国住房和城乡建设部. 混凝土结构设计规范: GB 50010—2010[S]. 北京: 中国建筑工业出版社, 2011.
Ministry of Housing and Urban-Rural Development, People’s Republic of China. Concrete structure design code: GB 50010—2010[S]. Beijing: China Building and Construction Press, 2011 (in Chinese).