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Behavior of steel beam to built-up box column moment connections with vertically stiffened panel zone

Behavior of steel beam to built-up box column moment connections with vertically stiffened panel... Continuity plates (horizontal diaphragms) are conventionally used in steel beam to column moment connections to provide a continuous load path for transferring moments in joints. However, fabricating connections with continuity plates in frames with built-up box columns is usually faced with problems which are mainly due to lack of accessibility. In the present study, the effectiveness of using vertical stiffeners in the panel zone of steel beam to built-up box column connections as an alternative to conventional continuity plates is investigated through a numerical investigation. In this regard, first, the Finite Element (FE) model which is implemented in FE software ABAQUS is validated using the results of tests conducted before on exterior steel beam to box column connections. The analysis results show a good agreement between the analysis and test results in terms of the hysteresis moment-rotation curve and the development of yielding in the connection. Then, the behavior of exterior and interior connections with different configurations of panel zone, including bare connection (with no stiffener in the panel zone), connection with conventional continuity plates, and joints with the proposed vertical stiffener detail, is investigated. The numerical simulations are conducted on models with different beam and column dimensions. According to the analysis results, the connections with unstiffened panel zone usually do not show a satisfactory performance. In these models the premature yielding of column flange is the dominant mode of failure and prevents connections from reaching the beam plastic strength. Oppositely, connections whose panel zones are stiffened using the proposed detail, show an almost similar behavior with those with conventional continuity plates. Furthermore, according to the yield pattern in the models and the hysteresis behavior of the connections, they can be classified as beam to column connections in special moment frames. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Building Pathology and Rehabilitation Springer Journals

Behavior of steel beam to built-up box column moment connections with vertically stiffened panel zone

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Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
2365-3159
eISSN
2365-3167
DOI
10.1007/s41024-022-00253-3
Publisher site
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Abstract

Continuity plates (horizontal diaphragms) are conventionally used in steel beam to column moment connections to provide a continuous load path for transferring moments in joints. However, fabricating connections with continuity plates in frames with built-up box columns is usually faced with problems which are mainly due to lack of accessibility. In the present study, the effectiveness of using vertical stiffeners in the panel zone of steel beam to built-up box column connections as an alternative to conventional continuity plates is investigated through a numerical investigation. In this regard, first, the Finite Element (FE) model which is implemented in FE software ABAQUS is validated using the results of tests conducted before on exterior steel beam to box column connections. The analysis results show a good agreement between the analysis and test results in terms of the hysteresis moment-rotation curve and the development of yielding in the connection. Then, the behavior of exterior and interior connections with different configurations of panel zone, including bare connection (with no stiffener in the panel zone), connection with conventional continuity plates, and joints with the proposed vertical stiffener detail, is investigated. The numerical simulations are conducted on models with different beam and column dimensions. According to the analysis results, the connections with unstiffened panel zone usually do not show a satisfactory performance. In these models the premature yielding of column flange is the dominant mode of failure and prevents connections from reaching the beam plastic strength. Oppositely, connections whose panel zones are stiffened using the proposed detail, show an almost similar behavior with those with conventional continuity plates. Furthermore, according to the yield pattern in the models and the hysteresis behavior of the connections, they can be classified as beam to column connections in special moment frames.

Journal

Journal of Building Pathology and Rehabilitation – Springer Journals

Published: Jun 1, 2023

Keywords: Steel beam to column moment connection; Built-up box column; Continuity plates; Numerical study; Vertical stiffener

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