[1]刘恺,郑晓鹏,刘东旭.各国规范对深梁抗剪强度计算的比较[J].浙江水利科技,2017,(02):049-53.[doi:10.13641/j.cnki.33-1162/tv.2017.02.014]
 LIU Kai,ZHENG Xiao-peng,LIU Dong-xu.Comparison of Shear Strength Calculation for Deep Beams Using Different Codes[J].Zhejiang Hydrotechnics,2017,(02):049-53.[doi:10.13641/j.cnki.33-1162/tv.2017.02.014]
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各国规范对深梁抗剪强度计算的比较
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《浙江水利科技》[ISSN:1008-701X/CN:33-1080/TV]

卷:
期数:
2017年02
页码:
049-53
栏目:
出版日期:
2017-03-25

文章信息/Info

Title:
Comparison of Shear Strength Calculation for Deep Beams Using Different Codes
作者:
刘恺 郑晓鹏 刘东旭
温州市水利电力勘测设计院, 浙江 温州 325000
Author(s):
LIU Kai ZHENG Xiao-peng LIU Dong-xu
Wenzhou Design Institute of Water Conservancy and Electric Power, Wenzhou 325000, Zhejiang, China
关键词:
钢筋混凝土深梁抗剪强度规范拉压杆模型
Keywords:
RC deep beamsshear strengthstrut-and-tie modelempirical formula
分类号:
TU375
DOI:
10.13641/j.cnki.33-1162/tv.2017.02.014
文献标志码:
A
摘要:
钢筋混凝土深梁具有较小的高跨比(或剪跨比),其破坏通常由受剪控制。然而其受力机理不同于一般梁,平截面假定对其并不适用。介绍了钢筋混凝土深梁受剪分析计算的方法,并对各国规范的相关内容进行简要说明。将中国规范的计算方法应用到549个简支混凝土深梁。结果表明,中国规范对高跨比小于2.00的深梁能够提供较为可靠的抗剪强度计算值(计算值与试验值之比的平均值为1.02,变异系数为25.1%),而对于高跨比大于2.00的梁的计算结果则离散性较大。对比各国规范计算结果发现,加拿大规范对钢筋混凝土抗剪强度计算提供最可靠的结果,美国规范在大多数情况下能提供较安全的结果,而中国规范和欧洲规范则未能提供相对安全的计算结果。同时发现,所有规范都未能提供对处于从深梁到一般梁过渡区域的梁的合理计算模型。
Abstract:
TReinforced concrete (RC) deep beam is characterized by small height-span ratio.The failure of deep beam is usually controlled by shear.Different from slender beams,deep beams have disturbed stress/strain field,so the assumption that "plane keeps plane" does not work for deep beams.This study first explains calculation methods for RC deep beams and then gives brief introduction on relevant regulations in different codes.The calculation method in Chinese code is applied to 549 simply-supported deep beams,and the results show that Chinese code can provide reliable prediction for deep beams with height-span ratio smaller than 2.00,while out of this range the prediction is quite scattered.The calculation results from other codes are compared also.It is found that the Canadian code provides the most reliable and accurate results,and American code can provide safe results in most of the cases,while predictions based on European code and Chinese code can be very unsafe.It is also very interesting to point out that almost all the codes need a better model for the beams located in the transfer zone from deep beams to slender beams.

参考文献/References:

[1] Lee,Duncan Ding Kan.An experimental investigation of the effects of detailing on the shear behaviour of deep beams[D].不详,1982.
[2] 华南理工大学.CECS39:92钢筋混凝土深梁设计规程[S]. 北京:中国建筑工业出版社,2002.
[3] 中华人民共和国住房与城乡建设部.GB 50010-2010钢筋混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.
[4] Mihaylov,B.I.,Bentz,E.C.,Collins,M.P.Two-Parameter Kinematic Theory for Shear Behavior of Deep Beams[J].ACI Structural Journal,2013,110(3):447-456.
[5] CSA Committee A23.3.Design of Concrete Structures,Canadian Standards Association[S].Mississauga,Ontario:Canadian Standards Association,2005.
[6] ACI Committee 318.Building Code Requirements for Reinforced Concrete (ACI 318-08) and Commentary (318 R-08)[S]. Farmington Hills American:Concrete Institute 465,2008.
[7] European Committee for Standardization,CEN,EN 1992-1-1. Eurocode 2:Design of Concrete Structures-Part 1-1:General Rules and Rules for Buildings[S].Brussels,Belgium:Eurepean Committee for stand ardization,2004:225.
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备注/Memo

备注/Memo:
收稿日期:2016-02-17。
作者简介:刘恺(1985-),男,工程师,大学本科,主要从事水利工程设计工作。
更新日期/Last Update: 2017-03-28