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Reinforced Wood I-Joists with Web Openings
| 题名： | Reinforced Wood I-Joists with Web Openings |
| 正文语种： | 英文 |
| 作者： | Md Shahnewaz; M. Shahidul Islam; Moein Ahmadipour;Thomas Tannert, M.ASCE;M. Shahria Alam, M.ASCE |
| 作者单位： | Univ, of British Columbia |
| 关键词： | Wood structures; Experimentation; Reinforcement; Regression analysis. |
| 摘要： | Prefabricated wood I-joists with web openings are commonly used in light-frame wood construction. The capacity and the failure pattern of such I-joists in the presence of a circular web opening were experimentally investigated on 100 specimens with various sizes and locations of web openings and two different span lengths of 3.66 m (12 ft) and 6.10 m (20 ft). The control I-joists, i.e., I-joists without any opening, failed in flexure in the midspan, whereas most of the I-joists with an opening failed in a brittle and sudden shear mode. The presence of an opening reduced the capacity up to 54% compared to I-joists without web openings depending on the size and location of the opening. Subsequently, to prevent brittle failure and improve capacity, the I-joists were reinforced using two perpendicular OSB collar layers with a variation in the reinforcement length. The effectiveness of reinforcing the web around openings was investigated on another 100 specimens. After reinforcement, brittle premature failure of I-joists was prevented with an increase in capacity up to 27% compared to the IJoists with openings. Analytical models to calculate the capacity of unreinforced and reinforced I-joists with openings are proposed, validated with results from previous research, which prove to be more accurate compared to existing models from the literature. DOI: 10.106l/(ASCE)ST.1943-541X.0001747. © 2017 American Society of Civil Engineers. |
| 出版日期： | 2017.06 |
| 出版年： | 2017 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.143 |
| 期： | NO.06 |
| 页码： | 04017022 |
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