登录
注册
E-alert
登录
注册
E-alert
FLEXURAL BEHAVIOR OF STEEL FIBER REINFORCED HIGH-STRENGTH CONCRETE BEAMS WITH HRB600 STEEL BARS UNDER MONOTONIC LOADING
-
摘要: 以不同钢纤维掺量和混凝土强度等级为变化参数，对4根HRB600级钢筋钢纤维高强混凝土梁进行了受弯性能试验，同时结合相关文献中HRB600级未掺钢纤维钢筋高强混凝土梁的试验数据，对比分析各试验梁的破坏特征、挠度、承载力、纵筋应变与裂缝宽度，评价了极限承载力、挠度及裂缝宽度计算方法。试验结果表明：配置600 MPa级高强钢筋的钢纤维混凝土梁的应变变化符合平截面假定；钢纤维可有效提高高强混凝土梁的弯曲开裂荷载和变形能力，抑制裂缝的产生与发展；且随着钢纤维掺量的增加，钢纤维高强混凝土梁的受弯承载力也随之增大；现行CECS 38：2004《纤维混凝土结构技术规程》中的计算方法，对HRB600级钢筋钢纤维高强混凝土梁的极限承载力计算、最大裂缝宽度计算和挠度计算仍然具有较好的适用性。Abstract: The flexural behavior of 4 steel fiber reinforced high-strength concrete beams with HRB600 steel bars was tested with different steel fiber contents and concrete strength grades. At the same time, the failure characteristics, deflection, bearing capacity, longitudinal reinforcement strain and crack width were compared and analyzed, and the calculation methods of ultimate bearing capacity, deflection and crack width were evaluated. The test results showed that the section strain change of steel fiber reinforced concrete beam with HRB600 steel bars conformed to flat section assumption. Steel fiber could effectively improve the bending cracking load and deformability of high-strength concrete beams and limit the generation and development of the bending vertical cracks. With the increase of steel fiber content, the flexural bearing capacity of steel fiber reinforced high-strength concrete beams increased. The current calculation method of CECS 38∶2004 Technical Specification for Fiber Reinforced Concrete Structures was still applicable to the calculation of the ultimate bearing capacity, maximum crack width and deflection of the steel fiber reinforced high-strength concrete beams with HRB600 steel bars.
-
Key words:
- HRB600 steel bar /
- steel fiber /
- high-strength concrete beam /
- flexural behavior
-
高丹盈,朱海堂,汤寄予.纤维高强混凝土抗剪性能的试验研究[J].建筑结构学报,2004,25(6):88-92. 中国工程建设标准化协会. 纤维混凝土结构技术规程:CECS 38:2004[S].北京:中国计划出版社,2004. CASANOVA P, ROSSI P. Analysis of Metallic Fibre-Reinforced Concrete Beams Submitted to Bending[J]. Materials and Structures, 1996, 29(6):354-361. DANCYGIER A N, SAVIR Z. Flexural Behavior of HSFRC with Low Reinforcement Ratios[J]. Engineering Structures, 2006, 28(11):1503-1512. DAI S B, SONG M H, HUANG J. Influence of Characteristics on Bending Strength of Layered Steel Fiber Reinforced Concrete[J]. Wuhan University Journal of Natural Sciences, 2005, 10(5):883-886. ALTUN F, HAKTANIR T, ARI K. Effects of Steel Fiber Addition on Mechanical Properties of Concrete and RC Beams[J]. Construction and Building Materials, 2007, 21(3):654-661. 管巧艳,贾燕,张明恩,等.钢筋钢纤维高强混凝土梁受弯性能研究[J].新型建筑材料,2007(12):15-18. 尤志国,付秀艳,周云龙,等.自密实混凝土受弯和受剪梁用纤维的对比[J].建筑结构,2017,47(13):78-84. 管俊峰,刘霖艾,张谦,等.配置600 MPa高强钢筋混凝土梁变形的试验及计算方法[J/OL].建筑结构学报,https:/doci.org/10.14006/j.jzjgxb.2017.0852. 黄伟,张丽,吴明超.HRB500级高性能钢筋钢纤维混凝土梁受弯性能试验研究[J].工业建筑,2011,41(11):76-80,115. 中华人民共和国国家质量监督检验检疫总局. 钢筋混凝土用钢第2部分:热轧带肋钢筋:GB/T 1499.2-2018[S].北京:中国标准出版社,2018. 张建伟,姜立伟,乔崎云,等.HRB600级钢筋高强混凝土梁受弯性能试验研究[J].工业建筑,2017,47(6):6-12. 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, 2010. -
点击查看大图
计量
- 文章访问数: 130
- HTML全文浏览量: 8
- PDF下载量: 2
- 被引次数: 0
下载:
