• 应用研究 •

### 考虑剪切效应的工字梁弯曲应力比拟杆法1)

1. *西北农林科技大学水利与建筑工程学院,陕西杨凌712100;
† 西北农林科技大学旱区寒区水工程安全研究中心,陕西杨凌712100;
**上海千年城市规划工程设计股份有限公司,上海200000
• 收稿日期:2017-07-19 修回日期:2017-11-17 出版日期:2018-06-15 发布日期:2018-07-17
• 作者简介:2)吴思远，硕士生，主要研究方向为水工结构稳定与控制。E-mail: siyuan wu1992@163.com；3) 王正中，教授，博士生导师，主要研究方向为水工结构稳定。E-mail: wangzz0910@163.com

### BAR SIMULATION METHOD FOR BENDING NORMAL STRESS OF I-BEAM IN CONSIDERATION OF SHEAR EFFECT 1)

WU Siyuan2,†,*, WANG Zhengzhong3,†,*, PENG Wenzhe*, LIU Shaojun*,†, LI Si*,**

1. * College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, Shanxi, China;
Cold and Arid Regions Water Engineering Safety Research Center, Northwest A&F University, Yangling 712100, Shanxi, China);
** Shanghai Thousand Year Design, Shanghai 200000, China
• Received:2017-07-19 Revised:2017-11-17 Online:2018-06-15 Published:2018-07-17

Abstract:

With the wide use of I-section short, deep beams and wide flange beams, the section nonlinear effect of shear deformation on the bending normal stress becomes an important issue, because enormous calculation errors will occur by using the traditional beam theory in the design. With the bar simulation method, formulas are derived in this paper for the calculation of the bending normal stress with consideration of the shear effect and results are compared with those obtained by various analytical methods and the finite element numerical simulation results. The results indicate that when § is small or ø is large, the bending deflection is affected greatly by the transverse shear. Besides, compared with the existing analytical methods, the proposed method offers more accurate results with an extended scope of application, which can be used for the structural design.

Key words:

I-section|shear effect|bending normal stress|bar simulation method