Test Investigation on Stiffness Performance of Steel Structures Composed of Cold-Roller-Bent Pipes

Abstract:

Curve-shaped roofs and facades are popularly used in the construction with roller bent pipe, which serves as structural element. Roller bent pipe are manufactured from straight pipe by a process called roller bending. The material is cold worked during forming, inducing a new distribution of mechanical properties across the section which is different compared to its original state. For a long time, original mechanical properties of the straight material are used in the design of curved structure. The influence of the roller bending process is usually ignored non-conservatively. Theoretically, cold-working makes the strength increased while the modulus decreased. The results of a series of tests and measuring investigation of the mechanical properties of cold-roller-bent pipes are present in this paper. The decreased modulus of cold-roller-bent pipes have significantly softened and weakened the overall mechanical properties of structures. The influence should be considered in the design of structures composed of cold-roller-bent pipes.

• Periodical: Applied Mechanics and Materials (Volumes 271-272)
• Pages: 519-523
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.271-272.519
• Online since: December 2012
• Authors: Wen Bo Sun, Wei Jian Zhou
• Keywords: Arced Pipe, Cold Roller Bending, Curved Truss, Stiffness Performance

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