# [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] 点击复制 一种无腹筋混凝土梁受剪承载力计算的新方法() 分享到： var jiathis_config = { data_track_clickback: true };

47

2017年第2期

362-368

2017-03-20

## 文章信息/Info

Title:
Novel calculation method for shear capacity of RC beams without web reinforcement

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):
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

Keywords:

TU375.1
DOI:
10.3969/j.issn.1001-0505.2017.02.027

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.

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