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International Journal of Steel Structures
Published in:

14-12-2018

Force and Deformation Demands of Bolts in Steel Bolted Bracket Moment Connections

Author: Jong-Kook Hong

Published in: International Journal of Steel Structures | Issue 1/2019

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Abstract

The behavior of pretentioned bolts at bracket-to-column in steel bolted bracket moment connections was investigated through detailed 3D non-linear finite element analysis. Analysis results indicated the significant increase of axial force in the bolt was caused by prying action due to column flange local bending. Tension force in the bolt was noted up to 166% of the initial bolt pretension, which corresponded to 125% of the nominal strength of the bolt. In addition, local deformation at bolt threads resulted in high strain demand at nut-to-column flange, which is the potential hazard of bolt fracture. A subsequent parametric study demonstrated that the strain concentration in the bolt could be shifted away from the critical location to the unthreaded shank by simply adding a 25 mm thick gang washer on the back side of column flange. But the tensile force demand in the bolts could not be reduced with additional gang washer plates. Reducing initial bolt pretension (i.e., sung-tight condition) does not contribute to the reduction in bolt tension force demand as well.
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Metadata
Title
Force and Deformation Demands of Bolts in Steel Bolted Bracket Moment Connections
Author
Jong-Kook Hong
Publication date
14-12-2018
Publisher
Korean Society of Steel Construction
Published in
International Journal of Steel Structures / Issue 1/2019
Print ISSN: 1598-2351
Electronic ISSN: 2093-6311
DOI
https://doi.org/10.1007/s13296-018-0197-5

Other articles of this Issue 1/2019

On a Reliability-Based Method to Improve the Seismic Performance of Midrise Steel Moment Resisting Frame Setback Buildings

Pinching in Steel Rack Joints: Numerical Modelling and Effects on Structural Response

Behavior of Partially Concrete Encased Steel Beams Under Cyclic Loading

Dynamic Crushing Behaviors of Aluminum Foam Filled Energy Absorption Connectors

Experimental Study and Numerical Analysis on the Progressive Collapse Resistance of SCMS

Thermo-Mechanical Analysis of CO2 Laser Butt Welding on AISI 304 Steel Thin Plates

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