[1]戚家南,王景全.考虑翼缘影响的钢筋混凝土T梁抗剪承载力[J].东南大学学报(自然科学版),2019,49(4):638-644.[doi:10.3969/j.issn.1001-0505.2019.04.005]
 Qi Jianan,Wang Jingquan.Shear strength of reinforced concrete T-beams considering the effect of flange[J].Journal of Southeast University (Natural Science Edition),2019,49(4):638-644.[doi:10.3969/j.issn.1001-0505.2019.04.005]
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考虑翼缘影响的钢筋混凝土T梁抗剪承载力()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
49
期数:
2019年第4期
页码:
638-644
栏目:
土木工程
出版日期:
2019-07-20

文章信息/Info

Title:
Shear strength of reinforced concrete T-beams considering the effect of flange
作者:
戚家南王景全
东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096; 东南大学国家预应力工程技术研究中心, 南京 210096
Author(s):
Qi Jianan Wang Jingquan
Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 210096, China
National Prestress Engineering Research Center, Southeast University, Nanjing 210096, China
关键词:
钢筋混凝土 T梁 抗剪承载力 有效腹板宽度 破坏准则
Keywords:
reinforced concrete T beam shear strength effective web width failure criterion
分类号:
TU375.1;U444
DOI:
10.3969/j.issn.1001-0505.2019.04.005
摘要:
针对现行规范忽略翼缘的抗剪提高作用和过于低估混凝土T梁抗剪承载力的问题,探讨了T形截面混凝土梁剪力传递机理,基于有效抗剪区域思想提出了腹板抗剪有效宽度计算方法,进而建立了考虑翼缘影响的混凝土T梁抗剪承载力理论计算式.该公式形式简单,物理意义明确,可退化为矩形梁抗剪承载力公式,可以较好地反应混凝土强度、剪跨比、纵筋率、翼缘宽度等主要因素对抗剪承载力的影响规律.采用157片混凝土T梁试验数据对理论计算式进行验证,并与国内外规范进行对比.结果表明,该公式可以很好预测混凝土T梁抗剪承载力,抗剪承载力计算值与试验值比值均值为1.012,标准差为0.268.
Abstract:
The current codes ignore the improvement on shear strength by flange, resulting in an underestimation on the shear strength of concrete T-beams. The shear transfer mechanism was discussed. The calculation method for the effective web width was established based on the concept of the effective shear funnel and the shear strength formula was proposed subsequently. The proposed shear strength formula is in a simple expression with clear physical significance. It can be degraded into the shear strength formula for reinforced concrete beams with rectangular cross-section and takes several main factors into account, such as concrete strength, shear span-to-depth ratio, longitudinal reinforcement ratio and flange width. 157 reinforced concrete T-beams were used to evaluate the proposed formula and compared with the specifications. The results indicate that the proposed shear strength formula is applicable to the prediction of the shear strength of reinforced concrete T-beams. The mean value of the ratios of the computational values to the experimental results is 1.012 with a standard deviation of 0.268.

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备注/Memo

备注/Memo:
收稿日期: 2019-01-22.
作者简介: 戚家南(1988—),男,博士,讲师,qijianan723@126.com.
基金项目: 国家自然科学基金资助项目(51438003、51678140)、中央高校基本科研业务费专项资金资助项目(2242019K40073).
引用本文: 戚家南,王景全.考虑翼缘影响的钢筋混凝土T梁抗剪承载力[J].东南大学学报(自然科学版),2019,49(4):638-644. DOI:10.3969/j.issn.1001-0505.2019.04.005.
更新日期/Last Update: 2019-07-20