An explicit, dynamic finite element model for the local failure of cold-formed trapezoidal sheeting

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Abstract

Trapezoidal sheeting, made of cold-formed, thin-walled steel, is widely used for the construction of cladding and roofs. At an interior support, the sheeting is subject to bending moments and a concentrated load, which leads to possible failure followed by two post-failure modes: the yield-arc and yield-eye modes. Until recently, it was not fully understood why a specific post-failure mode occurs and it was suggested that mode-jumping of the compressed sheeting flange may influence the mode occurring. This paper presents new research, in which both the compressed flange in isolation and the sheeting are modeled by using an explicit, dynamic finite element model. First, it is indicated that the mode-jumping phenomenon is not likely to occur for trapezoidal sheeting as used in practice. Secondly, it will be shown that whether the yield-arc or yield-eye post-failure occurs is mainly related to imperfections and the ratio between stresses caused by bending moment and concentrated load. Lastly, a simple yet accurate formula will be derived, which predicts the post-failure mode occurring, thus enabling further investigations into the sheeting's behavior, like moment redistribution and behavior of second and third generation sheeting.
Original languageEnglish
Title of host publicationProceedings of the 21th International Specialty Conference, Recent Research and Developments in Cold-Formed Steel Design and Construction, October 24- 25, 2012, St. Louis, Missouri
EditorsR.A. LaBoube, W.-W. Yu
Place of PublicationRolla, Missouri
PublisherMissouri University of Science and Technology
Pages407-423
Publication statusPublished - 2012
Eventconference; 21th International Specialty Conference, Recent Research and Developments in Cold-Formed Steel Design and Construction; 2012-10-24; 2012-10-25 -
Duration: 24 Oct 201225 Oct 2012

Conference

Conferenceconference; 21th International Specialty Conference, Recent Research and Developments in Cold-Formed Steel Design and Construction; 2012-10-24; 2012-10-25
Period24/10/1225/10/12
Other21th International Specialty Conference, Recent Research and Developments in Cold-Formed Steel Design and Construction

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