Structural Behavior of Composite Moment-Resisting Joints under Column-Removal Scenario
Publication: Journal of Structural Engineering
Volume 146, Issue 3
Abstract
One series of five composite joints with welded connections was tested and the influences of joint type, slab thickness, and number of shear studs were studied. Welded unreinforced flange with bolt web and reduced beam section connections were included. Load-resisting mechanism, failure mode, energy absorption capacity, and development of strains at the beam-column joints were investigated. Furthermore, test results including tying and flexural resistances and rotation capacities of the composite joints were compared with design values from building codes and design guidelines. Performance of welded connections was also compared with pin connections tested by the authors previously. It was found that the applied load was sustained by flexural action before the bottom beam flange fractured from the joint and by catenary action after that. Design flexural resistance and rotation capacity of composite joints with moment-resisting connections could be achieved, but design values of tying resistance could not be achieved owing to partial damage of connections at the initial stage. However, tie force requirements from Eurocode 1 Part 1-7 could be met.
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Acknowledgments
The authors gratefully acknowledge Ministry of Home Affairs (MHA), Singapore to provide the funding (MHA 191/9/1/345) under the Protective Technology Research Center, Nanyang Technological University, Singapore. Any opinions, findings and conclusions expressed in this paper are those of the authors and do not necessarily reflect the view of MHA, Singapore.
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©2019 American Society of Civil Engineers.
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Received: Aug 2, 2018
Accepted: Jun 28, 2019
Published online: Dec 27, 2019
Published in print: Mar 1, 2020
Discussion open until: May 27, 2020
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