[1]金凌志,周家亮,蒋春松,等.配箍率对不同剪跨比RPC梁受剪性能的影响分析[J].华侨大学学报(自然科学版),2017,38(1):38-44.[doi:10.11830/ISSN.1000-5013.201701007]
　JIN Lingzhi,ZHOU Jialiang,JIANG Chunsong,et al.Influence of Stirrup Ratio on Shear Behavior of RPC Beams Under Different Shear Span Ratio[J].Journal of Huaqiao University(Natural Science),2017,38(1):38-44.[doi:10.11830/ISSN.1000-5013.201701007]
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配箍率对不同剪跨比RPC梁受剪性能的影响分析()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第38卷
期数:
2017年第1期
页码:
38-44
栏目:
出版日期:
2017-01-09

文章信息/Info

Title:
Influence of Stirrup Ratio on Shear Behavior of RPC Beams Under Different Shear Span Ratio
文章编号:
1000-5013(2017)01-0038-07
作者:
金凌志;  周家亮;  蒋春松;  梅臣;  陈璇
桂林理工大学 广西岩土力学与工程重点实验室, 广西 桂林 541004
Author(s):
JIN Lingzhi;  ZHOU Jialiang;  JIANG Chunsong;  MEI Chen;  CHEN Xuan
Key Laboratory of Guangxi Geotechnical and Geotechnics Engineering, Guilin University of Science and Technology, Guilin 541004, China
关键词:
活性粉末混凝土;  简支梁;  剪跨比;  配箍率;  修正压力场理论
Keywords:
reactive powder concrete;  simply supported beams;  shear span ratio;  stirrup ratio;  modified compression field theory
分类号:
TU375.1
DOI:
10.11830/ISSN.1000-5013.201701007
文献标志码:
A
摘要:
为了探究不同剪跨比下配箍率对高强钢筋活性粉末混凝土(RPC)简支梁受剪性能的影响,对两组剪跨比(2.25,3.0)共6根不同配箍率的HRB500级钢筋RPC梁进行受剪性能试验.验证试验梁截面应变平截面假定,分析斜裂缝形态、开裂荷载与配箍率及剪跨比的关系,并提出基于修正压力场理论的HRB500级钢纤维RPC梁抗剪承载力的计算程序.研究表明:两组不同剪跨比下的试验梁在加载初始阶段均符合平截面假定,但达到40.4%极限荷载后,这种假定将不再满足;高强钢筋RPC梁的斜裂缝形态主要以腹剪型斜裂缝为主,其产生与配箍率及剪跨比相关,配箍率和剪跨比越大越不易产生主斜裂缝,但剪跨比的影响明显大于配箍率;基于修正压力场理论的计算程序比较适用于钢纤维高强钢筋RPC梁抗剪承载力的计算,其计算值与试验值吻合良好.
Abstract:
In order to discuss the influence of stirrup ratio on shear behavior of reactive powder concrete(RPC)simply supported beams with high-strength stirrups under different shear span ratio, six RPC beams with different stirrup ratio under two different shear span ratio(2.25 and 3.0)were experimented to verify the plane-section assumption of strain, to analyze the relationship among the shape of the inclined crack, the crack load, the shear span ratio and the stirrup ratio, then the calculation program of shear capacity of the steel fiber RPC beams with HRB500 stirrups were proposed based on the modified compression field theory(MCFT). It is showed that the two groups of test beams with different shear span ratio are in agreement with the plane-section assumption at the initial stage of loading, but this assumption is not valid when the load is over 40.4% of the ultimate value. The oblique cracks of RPC beams with high-strength stirrups are mainly the web-shear crack, which is related to the stirrup ratio and shear span ratio. As the shear span ratio and stirrup ratio increase, the main diagonal cracks occur seldom, the influence of shear span ratio is greater than stirrup ratio. This calculation program is suitable for the shear capacity of steel fiber reinforced high strength RPC beams-收稿日期:2016-07-17通信作者:金凌志(1959-),女,教授,主要从事新型材料混凝土结构的研究.E-mail:jlz-5904@163.com.基金项目:国家自然科学基金资助项目(51368013); 广西重点实验室科研基金资助项目(2015-A-02)http://www.hdxb.hqu.edu.cn based on the modified compression field theory, the calculated values agree well with the test results.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2016-07-17
通信作者: 金凌志(1959-),女,教授,主要从事新型材料混凝土结构的研究.E-mail:jlz-5904@163.com.
基金项目: 国家自然科学基金资助项目(51368013); 广西重点实验室科研基金资助项目(2015-A-02)
更新日期/Last Update: 2017-01-20