约束再生混凝土足尺试件受压应力-应变全曲线试验研究
CSTR:
作者:
基金项目:

北京市教委市属高校创新能力提升计划项目(PXM2015_014210_000005);北京建筑大学博士科研启动基金项目(00331615007)


Experimental study on complete stress-strain curve of full-scale specimen of confined recycled concrete under compression
Author:
Fund Project:

Beijing Municipal Commission of Education(No.PXM2015_014210_000005); Beijing University of Civil Engineering and Architecture(No.00331615007)

  • 摘要
  • | |
  • 访问统计
  • |
  • 参考文献 [15]
  • |
  • 相似文献 [20]
  • | | |
  • 文章评论
    摘要:

    为研究箍筋约束再生混凝土的单轴受压应力-应变全曲线,对9个直径为500mm、高度为1500mm的再生混凝土圆形柱进行试验,采用20000kN伺服液压试验机进行位移控制加载。试验参数主要为纵筋率、箍筋间距与直径、加载应变速率。试验结果表明,箍筋间距、配箍率对试件延性影响较大。当加载应变速率由0.000003/s增大到0.0033/s时,试件的峰值应力增大1.14倍。分析表明,再生混凝土应力-应变全曲线与普通混凝土类似,但下降段较普通混凝土陡峭,脆性更为明显。

    Abstract:

    To study the complete stress-strain curve of stirrup confined recycled concrete under uniaxial loading, we tested on nine circular column specimens of recycled concrete which have a diameter of 500 mm and a height of 1 500 mm. In this test,we used a servo-hydraulic test machine with a capacity of 20 000 kN for displacement and loading control. The main test parameters are longitudinal reinforcement ratio, the spacing and diameter of stirrup, and applied strain rate. The results show that the spacing of stirrup and stirrup ratio have great influence on the ductility of specimens. The peak stress of specimen increases 114% when the applied strain rate increases from 0.000003/s to 0.0033/s. The complete stress-strain curve of recycled concrete is similar to that of normal concrete but the descending branch is stiffer than that of normal concrete, which means that the recycled concrete is more brittle than normal concrete.

    参考文献
    [1] Scott B D, Park R , Priestley M J N. Stress-Strain behavior of concrete confined by overlapping hoops at low and high strain rates[J]. ACI Journal,1982,79(1):13-27.
    [2] Mander J B, Priestley M J N, Park R. Observed stress-strain behavior of confined concrete[J]. Journal of Structural Engineering. ASCE, 1988,114(8):1827-1849.
    [3] Cusson D, Paultre P. High-strength concrete columns confined by rectangular ties[J]. Journal of Structural Engineering[J]. ASCE, 1994,120(3):783-804.
    [4] Li B, Park R, Tanaka H. Stress-Strain behavior of high-strength concrete confined by ultra-high-and normal-strength transverse reinforcements[J]. ACI Structural Journal,2001,98(3):395-406.
    [5] Yan X, Hui W. Compressive behavior of concrete confined by carbon fiber composite jackets[J]. Journal of Materials in Civil Engineering,ASCE,2000,12(2):139-146.
    [6] 赵作周,张石昂,贺小岗,等. 箍筋约束高强混凝土受压应力应变本构关系[J]. 建筑结构学报, 2014,35(5):96-103. Zhao Z Z, Zhang S A, He X G,et al. Stress-strain relationship of stirrup-confined high-strength concrete[J]. Journal of Building Structural,2014,35(5): 96-103.(in Chinese)
    [7] 宋佳,李振宝,王元清,等. 考虑尺寸效应影响的箍筋约束混凝土应力应变本构关系模型[J]. 建筑结构学报, 2015,36(8):99-107. Song J, Li Z B, Wang Y Q,et al. Stress-Strain constitutive model of concrete confined by hoops with considering size effect[J]. Journal of Building Structural,2015,36(8): 99-107.(in Chinese)
    [8] 吴淑海,李晓文,肖慧,等. C30再生混凝土变形性能及应力应变曲线试验研究[J]. 混凝土, 2009(12):21-25. Wu S H, Li X W, Xiao H,et al. Experimental research on deformation properties and stress-strain curve of C30 recycled concrete[J]. Concrete,2009, (12): 21-25.(in Chinese)
    [9] 王雪婷,杨德健.再生混凝土单轴受压应力-应变全曲线试验[J]. 天津城市建设学院学报, 2010,16(3):175-178. Wang X T, Yang D J. Experimental Investigation on complete stress-strain curve of recycled concrete under uniaxial[J]. Journal of Tianjin Institute of Urban Construction,2010,16(3): 175-178.(in Chinese)
    [10] Xiao J Z, Huang Y J, Yang J, et al. Mechanical properties of confined recycled concrete under axial compression[J]. Construction and Building Materials, 2012, 26:591-603.
    [11] Zhao J L, Yu T, Teng J G, et al. Stress-strain behavior of FRP-confined recycled aggregate concrete[J]. Journal of Composites for Construction, ASCE, 2015, 19(3):1-11.
    [12] 曾岚,李丽娟,陈光明,等.GFRP-再生混凝土-钢管组合柱轴压力学性能试验研究[J].土木工程学报,2014,47(2):21-27 Zeng L, Li L J, Chen G M,et al. Experimental study on mechanical behavior of GFRP-recycled concrete-steel tubular columns under axial compression[J]. China Civil Engineering Journal,2014,47(2): 21-27.(in Chinese)
    [13] 牛海成,曹万林,董宏英,等.钢管高强再生混凝土柱轴压性能试验研究[J].建筑结构学报,2015,36(6):128-136 Niu H C, Cao W L, Dong H Y,et al. Experimental research on high-strength recycled concrete-filled steel tube columns subjected to axial compression[J]. Journal of Building Structural,2015,36(6): 128-136.(in Chinese)
    [14] Mander J B, Priestley M J N, Park R. Theoretical stress-strain model for confined concrete[J]. Journal of Structural Engineering, ASCE, 1988, (8):1804-1826.
    [15] 关萍,王清湘,赵国藩.高强约束混凝土应力应变本构关系的试验研究[J].工业建筑,1997,27(11):26-29. Guan P, Wang Q X, Zhao G F. Study on the tests of stress-strain relationship of confined high strength concrete[J]. Industrial Construction,1997,27(11): 26-29.(in Chinese)
    引证文献
    网友评论
    网友评论
    分享到微博
    发 布
引用本文

吴超垚,彭有开,吴徽.约束再生混凝土足尺试件受压应力-应变全曲线试验研究[J].土木与环境工程学报(中英文),2016,38(1):77-83. Wu Chaoyao, Peng Youkai, Wu Hui. Experimental study on complete stress-strain curve of full-scale specimen of confined recycled concrete under compression[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2016,38(1):77-83.10.11835/j. issn.1674-4764.2016.01.011

复制
相关视频

分享
文章指标
  • 点击次数:1405
  • 下载次数: 1047
  • HTML阅读次数: 536
  • 引用次数: 0
历史
  • 收稿日期:2015-08-20
  • 在线发布日期: 2016-03-01
文章二维码