[1]王卫仑,王险峰,丁小波,等.混凝土超高强化对无腹筋梁剪切抗力的影响[J].深圳大学学报理工版,2012,29(No.2(095-188)):136-141.[doi:10.3724/SP.J.1249.2012.02136]
　WANG Wei-lun,WANG Xian-feng,DING Xiao-bo,et al.Effect of concrete ultrahigh strength on shear of reinforced concrete beams without web reinforcements[J].Journal of Shenzhen University Science and Engineering,2012,29(No.2(095-188)):136-141.[doi:10.3724/SP.J.1249.2012.02136]
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混凝土超高强化对无腹筋梁剪切抗力的影响()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第29卷
期数:
2012年No.2(095-188)
页码:
136-141
栏目:
土木建筑工程
出版日期:
2012-03-23

文章信息/Info

Title:
Effect of concrete ultrahigh strength on shear of reinforced concrete beams without web reinforcements
作者:
王卫仑; 王险峰; 丁小波; 李雄
深圳大学土木工程学院，深圳市土木工程耐久性重点实验室，深圳 518060
Author(s):
WANG Wei-lun;  WANG Xian-feng;  DING Xiao-bo;  and LI Xiong
College of Civil Engineering, Shenzhen Durability Center of Civil Engineering, Shenzhen University, Shenzhen 518060, P.R.China
关键词:
超高强混凝土; 无腹筋梁; 压缩强度; 抗拉强度; 修正压缩区理论; 剪力计算式; 修订混凝土设计规范
Keywords:
ultrahigh strength concrete;  reinforced concrete beam without web reinforcements;  compressive strength;  tensile strength;  modified compression field theory;  shear equation;  revision of code for design of concrete structure
分类号:
TU 528.31；TU 375.1
DOI:
10.3724/SP.J.1249.2012.02136
文献标志码:
A
摘要:
对超高强混凝土无腹筋梁进行剪切试验及分析，研究混凝土强度对梁抗剪性能的影响，指出随着混凝土强度的提高，超高强梁剪切抗力的增加程度减缓．基于修正压缩区理论及剪切试验结果，对现行规范剪力计算公式中混凝土抗压强度的影响进行了修正，提出适用于超高强混凝土无腹筋梁抗剪承载力的建议式．结果表明，试验值与建议式计算值之比的均值为0.97，变异系数为24.30%，可较好反映混凝土强度对剪切承载力的影响．
Abstract:
It is aimed at studying the effect of concrete strength on shear property by experiment and calculation analysis for ultra high strength concrete beams without web reinforcements. The present investigation indicates that shear resistance of ultrahigh strength beams increase slowly with the increase of concrete compressive strength, and that shear of this kind of beam is overestimated by the current design provisions in ultrahigh strength zone. For this reason, the concrete strength effect of shear design equation was modified, and an improved shear equation was presented to apply ultrahigh strength concrete beams without stirrups based on MCFT methods and shear test results including other researcher’s experiments. The analytical results show that the mean of (test value/calculated value by the modified equation) is 0.97 with coefficient of variation of 24.30%. The recommended formula in this paper can better evaluate the influence of concrete strength on the shear bearing capacity for ultrahigh strength concrete RC beams.

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相似文献/References:

[1]王卫仑,邢锋,曹征良.超高强度无腹筋梁斜截面破坏实验研究[J].深圳大学学报理工版,2006,23(3):189.
　WANG Wei-Iun,XING Feng,and CAO Zheng-liang.Experimental study on shear failure modes for ultrahigh strength concrete RC beams without stirrups[J].Journal of Shenzhen University Science and Engineering,2006,23(No.2(095-188)):189.

备注/Memo

备注/Memo:
Received：2011-08-20；Accepted：2011-12-21
Foundation：National Natural Science Foundation of China (51078236) ，National Science Fund for Distinguished Young Scholars (50925829)
Corresponding author：Associate professor WANG Wei-lun．E-mail：wang_weilun@hotmail.com
Citation：WANG Wei-lun，WANG Xian-feng，DING Xiao-bo，et al．Effect of concrete ultrahigh strength on shear of reinforced concrete beams without web reinforcements［J］. Journal of Shenzhen University Science and Engineering, 2012, 29(2): 136-141.（in Chinese）
基金项目：国家自然科学基金资助项目（51078236）；国家杰出青年科学基金资助项目（50925829）
作者简介：王卫仑（1970-），男（汉族），陕西省汉中市人，深圳大学副教授、博士．E-mail：wang_weilun@hotmail.com
引文：王卫仑，王险峰，丁小波，等．混凝土超高强化对无腹筋梁剪切抗力的影响［J］. 深圳大学学报理工版，2012，29（2）：136-141.
更新日期/Last Update: 2012-03-28