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Design and Behavior of Enlarged End Flange (EEF) Steel Moment-Frame Connections

Design and Behavior of Enlarged End Flange (EEF) Steel Moment-Frame Connections The FEMA-350 indicates that the expected location of the plastic hinge for the frame beams with the Reduced Beam Section (RBS) connections is valid only for beams with gravity loads representing a small portion of the total flexural demand. In order to overcome the limitation of the gravity loads, the Enlarged End Flange (EEF) connection is proposed. In EEF connections, side plates are welded to the beam flanges near the beam ends. This paper presents a hand-calculated design example and the suggested connection details of a beam with the EEF connection. A study of the flexural strength and the interstory drift angular rotations of a total of five EEF beam-to-column connections, with beam sizes ranging from W24 × 94 up to W36 × 182, using the nonlinear static finite element approach is also summarized in this paper. The study concludes that the EEF connection is recommended for use in an ordinary moment frame system with wide bay widths. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advances in Structural Engineering SAGE

Design and Behavior of Enlarged End Flange (EEF) Steel Moment-Frame Connections

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Publisher
SAGE
Copyright
© 2006 SAGE Publications
ISSN
1369-4332
eISSN
2048-4011
DOI
10.1260/136943306778812723
Publisher site
See Article on Publisher Site

Abstract

The FEMA-350 indicates that the expected location of the plastic hinge for the frame beams with the Reduced Beam Section (RBS) connections is valid only for beams with gravity loads representing a small portion of the total flexural demand. In order to overcome the limitation of the gravity loads, the Enlarged End Flange (EEF) connection is proposed. In EEF connections, side plates are welded to the beam flanges near the beam ends. This paper presents a hand-calculated design example and the suggested connection details of a beam with the EEF connection. A study of the flexural strength and the interstory drift angular rotations of a total of five EEF beam-to-column connections, with beam sizes ranging from W24 × 94 up to W36 × 182, using the nonlinear static finite element approach is also summarized in this paper. The study concludes that the EEF connection is recommended for use in an ordinary moment frame system with wide bay widths.

Journal

Advances in Structural EngineeringSAGE

Published: Aug 1, 2006

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