Eighth Congress on Forensic Engineering
Rails in Retractable Roofs: Overview of the Design Methodology and a Case Study
Publication: Forensic Engineering 2018: Forging Forensic Frontiers
ABSTRACT
Movable structures are becoming one of the new trends for large-span sports facilities. This structure typically involves retractable roofs which are supported by single- or double-line wheeled carts (called bogies) travelling along the steel rails on the runaways. Rail members, which are connected by thermite welding, are subjected to combined load conditions including the dynamic wheel loads during its operation and temperature change. This paper discusses the approach to evaluate the internal stresses in the rail section due to the combined effects of the service wheel loads, the anticipated in-service temperature changes, and the residual stresses due to both manufacturing cooling and straightening, and welding. The main factors that affect the performance of thermite welds are discussed, and techniques for in situ assessment of rail sections are illustrated. Finally, a case study on a rail failure is presented and the potential issues that defective thermite welding installations can raise are discussed.
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Information & Authors
Information
Published In
Forensic Engineering 2018: Forging Forensic Frontiers
Pages: 329 - 335
Editors: Rui Liu, Ph.D., Kent State University, Michael P. Lester, Element Analytical, Alicia E. Díaz de León, and Michael J. Drerup
ISBN (Online): 978-0-7844-8201-8
Copyright
© 2018 American Society of Civil Engineers.
History
Published online: Nov 27, 2018
Published in print: Nov 27, 2018
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