[1]郑开启,刘钊,孟少平,等.一种无腹筋混凝土梁受剪承载力计算的新方法[J].东南大学学报(自然科学版),2017,47(2):362-368.[doi:10.3969/j.issn.1001-0505.2017.02.027]
 Zheng Kaiqi,Liu Zhao,Meng Shaoping,et al.Novel calculation method for shear capacity of RC beams without web reinforcement[J].Journal of Southeast University (Natural Science Edition),2017,47(2):362-368.[doi:10.3969/j.issn.1001-0505.2017.02.027]
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一种无腹筋混凝土梁受剪承载力计算的新方法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
47
期数:
2017年第2期
页码:
362-368
栏目:
土木工程
出版日期:
2017-03-20

文章信息/Info

Title:
Novel calculation method for shear capacity of RC beams without web reinforcement
作者:
郑开启1刘钊1孟少平1秦顺全12
1东南大学混凝土与预应力混凝土结构教育部重点实验室, 南京 210096; 2中铁大桥勘测设计院集团有限公司, 武汉 430050
Author(s):
Zheng Kaiqi1 Liu Zhao1 Meng Shaoping1 Qin Shunquan12
1Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
2China Railway Major Bridge Reconnaissance and Design Institute Co., Ltd., Wuhan 430050, China
关键词:
钢筋混凝土梁 受剪承载力 剪压区 斜拉区 尺寸效应
Keywords:
reinforced concrete beam shear capacity shear compression zone diagonal tension zone size effect
分类号:
TU375.1
DOI:
10.3969/j.issn.1001-0505.2017.02.027
摘要:
为了提高无腹筋混凝土梁特别是大尺寸、低纵筋率的无腹筋梁的受剪承载力预测精度,提出了一种无腹筋混凝土梁受剪承载力计算的新方法.首先,假定剪力主要由无腹筋梁的混凝土受压区承担,并根据其破坏模式将混凝土受压区细分为剪压区和斜拉区2个部分;其次,通过分析剪压区和斜拉区的破坏机理,建立抗剪贡献的计算公式;然后,通过合理简化和理论推导,确定受压区高度、剪压区高度等主要参数的取值;最后,在考虑尺寸效应的基础上,建立无腹筋混凝土浅梁的受剪承载力解析公式,该公式具有明确的物理涵义,能够反映混凝土强度、纵筋率、剪跨比以及尺寸效应等主要因素的影响.试验结果表明,相比于现行主要规范公式,所提公式的预测精度和预测稳定性均有明显提高.
Abstract:
A novel calculation method was proposed to improve the prediction accuracy of the shear capacity of reinforced concrete(RC)beams without web reinforcement, especially for the beams with large size and low longitudinal reinforcement ratio. First, the shear force was assumed to be mainly balanced by the concrete compression zone, which can be further divided into two regions, including the shear compression zone and the diagonal tension zone, by the failure modes. Secondly, the failure mechanisms in the shear compression zone and the diagonal tension zone were analyzed, and the corresponding shear contribution formulas were established. Then, with rational simplification and theoretical derivation, the main parameters such as the height of the compression zone and the height of the shear compression zone were determined. Finally, the analytical formula of the shear strength of the RC beams without stirrups was formed with consideration of the size effect. This formula has a clear physical meaning and can reflect the influences of the major shear parameters such as the concrete strength, the longitudinal reinforcement ratio, the ratio of the shear span to the depth, the size effect, and so on. The experimental results show that the proposed formula provides higher prediction accuracy and stability compared with the shear formulas in the main existing codes.

参考文献/References:

[1] 中华人民共和国住房和城乡建设部. GB 50010—2010 混凝土结构设计规范[S]. 北京: 中国建筑工业出版社, 2010.
[2] ACI Committee 318. ACI 318-14 Building code requirements for structural concrete and commentary [S]. Farmington, Minnesota, USA: American Concrete Institute, 2014.
[3] 袁健, 易伟建. 钢筋混凝土无腹筋梁受剪承载力计算模型误差分析[J]. 建筑结构学报, 2014, 35(9): 72-81. DOI:10.14006/j.jzjgxb.2014.09.010.
Yuan Jian, Yi Weijian. Error analysis of shear capacity calculation models for reinforced concrete beams without web reinforcement[J]. Journal of Building Structures, 2014, 35(9): 72-81. DOI:10.14006/j.jzjgxb.2014.09.010. (in Chinese)
[4] Collins M P, Bentz E C, Sherwood E G. Where is shear reinforcement required? Review of research results and design procedures[J]. ACI Structural Journal, 2008, 105(5): 590-600.
[5] 于磊, 车轶, 宋玉普. 大尺寸钢筋混凝土无腹筋梁受剪试验研究[J]. 土木工程学报, 2013, 46(1): 1-7.
  Yu Lei, Che Yi, Song Yupu. Experimental study on shear strength of large-size reinforced concrete beams without web reinforcement[J].China Civil Engineering Journal, 2013, 46(1): 1-7.(in Chinese)
[6] Kani G N J. The riddle of shear failure and its solution[J]. ACI Journal Proceedings, 1964, 61(4): 441-468.
[7] Zsutty T C. Shear strength prediction for separate categories of simple beam tests[J]. ACI Journal Proceedings, 1971, 68(2): 138-143.
[8] Ba?ant Z P, Kim J K. Size effect in shear failure of longitudinally reinforced beams[J]. ACI Journal Proceedings, 1984, 81(5): 456-468.
[9] Russo G, Somma G, Mitri D. Shear strength analysis and prediction for reinforced concrete beams without stirrups[J]. Journal of Structural Engineering, 2005, 131(1): 66-74. DOI:10.1061/(asce)0733-9445(2005)131:1(66).
[10] 魏巍巍, 贡金鑫, 车轶. 无腹筋钢筋混凝土受弯构件基于修正压力场理论的受剪计算[J]. 建筑结构学报, 2010, 31(8): 79-85.
  Wei Weiwei, Gong Jinxin, Che Yi. Shear strength of reinforced concrete members without stirrups based on modified compression field theory[J]. Journal of Building Structures, 2010, 31(8): 79-85.(in Chinese)
[11] Choi K K, Park H G, Wight J K. Unified shear strength model for reinforced concrete beams—Part Ⅰ: Development[J]. ACI Structural Journal, 2007, 104(2): 142-152.
[12] 王景全, 戚家南. 有腹筋与无腹筋钢筋混凝土梁抗剪承载力统一计算方法[J]. 土木工程学报, 2013, 46(7): 47-57.
  Wang Jingquan, Qi Jianan. Unified shear strength computation model for reinforced concrete beams with and without stirrups[J].China Civil Engineering Journal, 2013, 46(7): 47-57.(in Chinese)
[13] 刘立新. 钢筋混凝土深梁、短梁和浅梁受剪承载力的统一计算方法[J]. 建筑结构学报, 1995, 16(4): 13-21.
  Liu Lixin. An unified calculation method for shear capacity of R.C. deep beams, short beams and shallow beams[J]. Journal of Building Structures, 1995, 16(4): 13-21.(in Chinese)
[14] Kuo W W, Hsu T T C, Hwang S J. Shear strength of reinforced concrete beams[J]. ACI Structural Journal, 2014, 111(4): 809-818. DOI:10.14359/51686733.
[15] Tureyen A K, Frosch R J. Concrete shear strength: Another perspective[J]. ACI Structural Journal, 2003, 100(5): 609-615. DOI:10.14359/12802.
[16] Reineck K H, Bentz E C, Fitik B, et al. ACI-DAfStb database of shear tests on slender reinforced concrete beams without stirrups[J]. ACI Structural Journal, 2013, 110(5): 867-876.DOI:10.14359/51686819.
[17] 高丹盈. 钢纤维钢筋混凝土无腹筋梁的斜截面抗剪强度[J]. 水利学报, 1992(2): 63-66,79.
[18] American Association of State Highway and Transportation Officials. AASHTO-LRFD bridge design specifications[S]. Washington DC,USA: AASHTO, 2014.

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备注/Memo

备注/Memo:
收稿日期: 2016-07-24.
作者简介: 郑开启(1986—),男,博士生;刘钊(联系人),男,博士,教授,博士生导师,mr.liuzhao@seu.edu.cn.
基金项目: 交通运输部建设科技资助项目(2014318494020)、江苏省交通运输科技资助项目(2014Y01).
引用本文: 郑开启,刘钊,孟少平,等.一种无腹筋混凝土梁受剪承载力计算的新方法[J].东南大学学报(自然科学版),2017,47(2):362-368. DOI:10.3969/j.issn.1001-0505.2017.02.027.
更新日期/Last Update: 2017-03-20