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Structural Engineering and Mechanics Volume 81, Number 4, February25 2022 , pages 493-502 DOI: https://doi.org/10.12989/sem.2022.81.4.493 |
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Shear lag coefficient of angles with bolted connections including equal and different legs through finite element method |
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Lida Shahbazi, Sepideh Rahimi, Mohamad Hoseinzadeh and Ramzan Rezaieaan
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| Abstract | ||
| Shear lag phenomenon has long been considered in numerous structural codes; however, the AISC provisions have now no longer proposed any unique equation to calculate the shear lag ratio in bolted connections for angles in general. It is noticeable that, however, codes used in this case are largely conservative and need to be amended. A parametric study consisting of 27 angle sections with equal legs and different with bolted connections was performed to investigate the effects of shear lag on the ultimate tensile capacity of angle members. The main parameters were: steel grade, connection length and eccentricity from the center of the plate, as well as the number of rows of bolts parallel to the applied force. The test results were compared with the predictions of the classical 1-x/l law proposed by Mons and Chesen to investigate its application to quantify the effect of shear lag. A parametric study was performed using valid FE models that cover a wide range of parameters. Finally, based on the numerical results, design considerations were proposed to quantify the effect of shear lag on the ultimate tensile capacity of the tensile members. | ||
| Key Words | ||
| angle section; bolt connection; net cross section failure; shear lag; tensile members | ||
| Address | ||
| Lida Shahbazi, Sepideh Rahimi, Mohamad Hoseinzadeh and Ramzan Rezaieaan: Department of Civil Engineering, Islamic Azad University - Nour Branch, Nour, Iran | ||