BFRP筋与钢筋混合配筋混凝土梁抗弯性能试验研究

玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (8): 48-54.

BFRP筋与钢筋混合配筋混凝土梁抗弯性能试验研究

孔祥清, 于洋, 邢丽丽, 韩飞

辽宁工业大学土木建筑工程学院,锦州121001

收稿日期:2018-01-22 出版日期:2018-08-28 发布日期:2018-08-28
作者简介:孔祥清(1982-),女,博士,副教授,主要从事新型材料及结构力学性能方面的研究,xqkong@lnut.edu.cn。
基金资助:
国家自然科学基金(11302093);辽宁省自然科学基金(SY2016001)

EXPERIMENT STUDY ON THE FLEXURAL BEHAVIOUR OF HYBRID BFRP/STEEL REINFORCED CONCRETE BEAMS

KONG Xiang-qing, YU Yang, XING Li-li, HAN fei

College of Civil & Architectural Engineering, Liaoning University of Technology, Jinzhou 121001, China

Received:2018-01-22 Online:2018-08-28 Published:2018-08-28

摘要/Abstract

摘要： 设计制作10根梁,包括1根玄武岩纤维(BFRP)筋混凝土梁、1根钢筋混凝土梁以及8根BFRP/钢筋混合配筋混凝土梁。通过试验研究了高配筋率及低配筋率下不同配筋面积比对混合配筋混凝土梁受弯性能的影响,分析其承载力、破坏形态、变形性能、裂缝发展及延性性能,并与BFRP筋混凝土梁以及钢筋混凝土梁进行了对比。结果表明,BFRP/钢筋混合配筋梁的破坏形式包括两种:高配筋率混合配筋梁钢筋屈服后受压区混凝土压碎;低配筋率混合配筋梁则在钢筋屈服后BFRP筋被拉断,梁发生脆性破坏。混合配筋混凝土梁荷载-挠度曲线表现出以试件开裂和钢筋屈服为转折点的三线性特征。混合配筋混凝土梁极限承载力稍低于BFRP筋混凝土梁,但高于钢筋混凝土梁,且随着配筋面积的增加而增加。混合配筋混凝土梁的延性系数均比钢筋混凝土梁大,且配筋率越低,配筋面积比越大,延性系数越高。要满足结构抗震设计规范要求,建议配筋面积比不小于0.6。

关键词: BFRP筋, 混合配筋混凝土梁, 抗弯性能, 配筋面积比, 延性

Abstract: A total of ten concrete beams, including one reinforced with BFRP, one reinforced with steel, and eight reinforced with hybrid BFRP and steel, were designed and prepared. Experiment tests were carried out to investigate the effect of reinforcement area ratio on the flexural behaviour of hybrid BFRP/steel reinforced concrete beams with a low and high reinforcement ratio. The flexural capacity, failure mode, flexibility deformation, crack distribution and ductility performance of the hybrid BFRP/steel reinforced concrete beams were analyzed and compared with the BFRP reinforced beam as well as the steel reinforced beam. The results indicated that there are two main failure modes: the hybrid BFRP/steel reinforced concrete beams with high reinforcement ratio fails by crushing of concrete in compression and either yielding of steel and the test beams with low reinforcement ratio fails by crushing of concrete in compression and either rupture of FRP in tension. The load-deflection curves of the hybrid reinforced concrete beams show three linear characteristics including the turning points corresponding to the cracking load and the yield of the steel bars. The ultimate bearing capacity of the hybrid reinforced concrete beams, which is found to be increased with the increase of area ratio, is slightly lower than that of BFRP reinforced concrete beams, but it is higher than that of reinforced concrete beams. The ductility of hybrid reinforced concrete beams are all larger than that of steel reinforced concrete beams. The lower the reinforcement ratio, the greater the reinforcement area ratio and the higher the ductility coefficient. To meet the requirements of structural seismic design specifications, it is recommended that the reinforcement area ratio is controlled to be not less than 0.6.

Key words: BFRP bar, hybrid reinforcement concrete beams, flexural capacity, reinforcement area ratio, ductility

中图分类号:

TB332

孔祥清, 于洋, 邢丽丽, 韩飞. BFRP筋与钢筋混合配筋混凝土梁抗弯性能试验研究[J]. 玻璃钢/复合材料, 2018, 0(8): 48-54.

KONG Xiang-qing, YU Yang, XING Li-li, HAN fei. EXPERIMENT STUDY ON THE FLEXURAL BEHAVIOUR OF HYBRID BFRP/STEEL REINFORCED CONCRETE BEAMS[J]. Fiber Reinforced Plastics/Composites, 2018, 0(8): 48-54.

参考文献

[1] 贡金鑫, 赵国藩. 钢筋混凝土耐久性研究的进展[J]. 工业建筑, 2000, 30(5): 1-5.
[2] 叶列平, 冯鹏. FRP在工程结构中的应用与发展[J]. 土木工程学报, 2006, 39(3): 24-36.
[3] 吕志涛. 高性能材料FRP应用与结构工程创新[J]. 建筑科学与工程学报, 2005, 22(1): 1-5.
[4] 梅葵花, 吕志涛, 张继文, 等. 碳纤维复合材料索斜拉桥的设计与测试[J]. 长安大学学报:自然科学版, 2007, 27(6): 48-52.
[5] Tan K H. Behaviour of hybrid FRP-steel reinforced concrete beams[C]//Proceeding of the Third International Symposium on Non-metallic (FRP) Reinforcement for Concrete Structures (FRPRCS-3). Japan Concrete Institute. Japan: 1997: 487-494.
[6] Aiello M A, Ombers L. Structural performances of concrete beams with hybrid (fiber-reinforced polymer-steel) reinforcements[J]. Journal of Composites for Construction, 2002, 6(2): 133-140.
[7] 陈辉. GFRP筋与钢筋混合配筋混凝土受弯构件的试验研究与理论分析[D]. 成都: 西南交通大学, 2007.
[8] 葛文杰, 张继文, 戴航, 等. FRP筋和钢筋混合配筋增强混凝土梁受弯性能[J]. 东南大学学报(自然科学版), 2012, 42(1): 115-119.
[9] Lau D, Pam H J. Experimental study of hybrid FRP reinforced concrete beams[J]. Engineering Structures, 2010,32(12): 3857-3865.
[10] Yoo D Y, Banthia N, Yoon Y S. Flexural behavior of ultra-high-performance fiber-reinforced concrete beams reinforced with GFRP and steel rebars[J]. Engineering Structures, 2016, 111: 246-262.
[11] Leung H Y, Balendran R V. Flexural behaviour of concrete beams internally reinforced with GFRP rods and steel rebars[J]. Structural Survey, 2003, 21(4):146-157.
[12] 屈文俊, 陈道普, 黄海群. 钢-GFRP混合配筋混凝土梁抗弯承载力计算[J]. 建筑结构, 2006(12): 22-24.
[13] 葛文杰, 张继文, 戴航, 等. FRP筋和钢筋混合配筋增强混凝土梁受弯性能[J]. 东南大学学报(自然科学版), 2012, 42(1): 115-119.
[14] 张晓亮, 屈文俊. 无腹筋GFRP筋混凝土梁抗剪性能试验[J]. 中国公路学报, 2010, 23(5): 51-57.
[15] 中华人民共和国城乡建设环境保护部. 混凝土结构试验方法标准[S]. 北京:中国建筑工业出版社, 1992.
[16] 中华人民共和国建设部. 混凝土结构设计规范[S]. 北京:中国建筑工业出版社, 2011.
[17] 蓝宗建. 混凝土结构设计原理[M]. 南京: 东南大学出版社, 2008.
[18] 过镇海. 钢筋混凝土原理[M]. 北京: 清华大学出版社, 2013.
[19] Qin R, Zhou A, Lau D. Effect of reinforcement ratio on the flexural performance of hybrid FRP reinforced concrete beams[J]. Composites Part B Engineering, 2017, 108: 200-209.
[20] 中华人民共和国建设部. 建筑抗震设计规范[S]. 北京: 中国建筑工业出版社, 2016.