Experimental Study on Bonding Performance Between Rebar and Coarse Aggregate Ultra-High Performance Concrete

被引：0
|
作者：
Zhao C. [1 ]
Li H. [1 ]
Deng K. [1 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2019年 / 54卷 / 05期
关键词：
Bonding; Bonding length; Coarse aggregate ultra-high performance concrete; Failure modes; Thickness of cover layer;
D O I：
10.3969/j.issn.0258-2724.20170513
中图分类号：
学科分类号：
摘要：
To investigate the bonding performance between the reinforcement and coarse aggregate UHPC(ultra-high performance concrete), six sets of pulling out specimens were tested. The effect of reinforcement diameter, cover layer thickness, and anchorage length were quantitatively studied, and further analysis based on the classic thick-cylinder theory and Lame Formula were conducted to obtain the influence of cover layer thickness. The formula for estimating the peak bonding stress was obtained through regression analysis, which was validated with the several physical tests. According to the results, the bonds between the reinforcement and coarse aggregate UHPC have similar failure modes with that of RPC(reactive powder concrete), including " wipe failure" and " split failure". The thickness of cover layer in coarse aggregate UHPC is a little larger than that in RPC, while the demand of anchorage length is almost the same. The cover layer thickness and anchorage length have interactive effect on each other, meaning that sufficient anchorage length can reduce the requirement of cover layer thickness. Finally, the suggested anchorage length is presented. © 2019, Editorial Department of Journal of Southwest Jiaotong University. All right reserved.
引用
收藏
页码：937 / 944
页数：7
相关论文
共 13 条
  • [1] Fehling E., Schmidt M., Walraven J., Et al., Ultra-high Performance UHPC: Fundamentals, Design, Examples, pp. 1-3, (2014)
  • [2] Rossi P., Ultra-high performance fiber-reinforced concretes, Concrete International, 23, 12, pp. 46-52, (2001)
  • [3] Graybeal B., Ultra-high performance concrete, (2011)
  • [4] Graybeal B., Material property characterization of ultra-high performance concrete, (2006)
  • [5] Ultra High Performance Fiber-reinforced Concretes Interim Recommendations, pp. 7-9, (2002)
  • [6] Scheydt J., Herold G., Mueller H.S., Et al., Development and application of UHPC convenience blends, Second International Symposium on Ultra High Performance Concrete, pp. 69-76, (2008)
  • [7] Deng Z., Yuan C., Experimental study on bond capability between high strength rebar and reactive powder concrete, China Civil Engineering Journal, 47, 3, pp. 69-78, (2014)
  • [8] Li P., Zheng Q., Long L., Et al., Impact of embedded rebar length on adhesive property between Ultra High Performance Concrete and rebar, Building Construction, 38, 12, pp. 1722-1723, (2016)
  • [9] An M., Zhang M., Experimental research of bond capability between deformed bars and reactive powder concrete, China Railway Science, 28, 2, pp. 50-54, (2007)
  • [10] Cheng J., Liu J., Zhang L., Properties of uniaxial tension and mechanism of strengthening and toughening of ultra-high performance concrete containing coarse aggregate, China Concrete and Cement Products, 12, pp. 1-5, (2015)
12