原文传递
Ultimate Bearing Capacity of Unconfined Bolted Connections in Cold-Formed Steel Members
| 题名： | Ultimate Bearing Capacity of Unconfined Bolted Connections in Cold-Formed Steel Members |
| 正文语种： | eng |
| 作者： | Bhuiyan, Refat A.;Ahmed, Aziz;Teh, Lip H. |
| 作者单位： | Univ Wollongong Australian Res Council Res Hub Australian Steel Mfg Sch Civil Min & Environm Engn Wollongong NSW 2500 Australia;Univ Wollongong Australian Res Council Res Hub Australian Steel Mfg Sch Civil Min & Environm Engn Wollongong NSW 2500 Australia;Univ Wollongong Australian Res Council Res Hub Australian Steel Mfg Sch Civil Min & Environm Engn Wollongong NSW 2500 Australia |
| 关键词： | Bolted connections;Bearing strength;Cold-formed steel;Loose connections;Unconfined bolted connections;Rectangular hollow section connections |
| 摘要： | The commentary to the North American cold-formed steel specification recommends physical testing to determine the performance of a bolted connection where the plies are not in contact with each other. This paper presents the laboratory test results of 120 such specimens with sheet thicknesses ranging from 0.55 to 3.0 mm, bolted with 10-, 12-, or 16-mm bolts. Finite-element analyses support the experimental finding that the bearing failure of an unconfined bolted connection is not associated with shear fracture but with crimpling of the critical ply. The bearing capacity varies with the square root of the bolt diameter and nonlinearly with the sheet thickness. Dimensionally consistent and continuous design equations are derived and verified against the results of the laboratory tests and finite-element analyses, the latter supplementing the former with configurations involving 8-mm bolts. The derived relationships between the bearing capacity and the sheet thickness and bolt diameter are also verified against 18 independent test results involving bolted connections through square hollow sections. The presented equation is significantly simpler but more accurate than those proposed in the literature for such connections. A resistance factor of 0.70 is recommended for use with the proposed design equations for determining the bearing capacities of unconfined bolted connections. (C) 2021 Published by American Society of Civil Engineers. |
| 出版年： | 2021 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 147 |
| 期： | 5 |
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