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Experiments and Analysis of Unstiffened Eight-Bolt End-Plate Moment Connections for Seismic Applications
| 题名： | Experiments and Analysis of Unstiffened Eight-Bolt End-Plate Moment Connections for Seismic Applications |
| 正文语种： | eng |
| 作者： | Morrison, Machel;Suarez, Sergio |
| 作者单位： | Univ Calif San Diego Dept Struct Engn La Jolla CA 92093 USA;Univ Calif San Diego Dept Struct Engn La Jolla CA 92093 USA |
| 关键词： | End-plate connection;Connections;Bolted connection;Bolt force distribution;Bolt arrangement |
| 摘要： | Bolted extended end-plate (BEEP) moment connections are one of several types of connections prequalified for use in special and intermediate moment frames in the ANSI/AISC 358 standard. The BEEP connections that are prequalified include a stiffened and unstiffened four-bolt configuration and a stiffened eight-bolt configuration. In this study, a recently proposed unstiffened eight-bolt configuration is evaluated through large-scale testing and detailed finite-element (FE) analysis. The connection features a modified bolt arrangement to improve bolt force distribution and eliminates the stress concentration from the end-plate stiffener that has led to brittle beam flange fractures in recent studies. In all tests, the proposed connection attained the ANSI/AISC 341 qualifying 4% story drift requirement and exhibited a ductile failure mode, namely, local buckling in the beam plastic hinge and gradual strength degradation. A detailed FE model of the proposed connection is validated against the experimental data and used to further analyze and optimize the connection through parametric studies. Finally, a design procedure which parallels that in chapter 6 of the ANSI/AISC 358 for existing BEEP connections is proposed. A central aspect of the design procedure is a method to calculate bolt forces, including the effects of prying, in the proposed connection. |
| 出版年： | 2022 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 148 |
| 期： | 4 |
| 页码： | 04022005.1-04022005.21 |
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