In-plane failure mechanisms and strength design of circular steel tubular Vierendeel truss arches with rectangular section. (February 2021)

• Record Type: Journal Article
• Authors: Shi, Minjie; Yuan, Bo; Jiang, Tengzhao; Wei, Yanhui
• Is Part Of: Structures. Volume 29(2021)
• Page Start: 1779
• Page End: 1790
• Publication Date: 2021-02
• Subjects: Circular steel tubular -- Vierendeel truss arches -- Rectangular section -- Strength design -- Global failure -- Local failure; Structural engineering -- Periodicals; 624.1
• DOI: 10.1016/j.istruc.2020.12.040
• Languages: English
• ISSNs: 2352-0124

Abstract

Abstract: This paper investigates the in-plane failure mechanisms and strength of circular steel tubular Vierendeel truss arches with a rectangular section by using the finite element models. Firstly, the analytical solution for the in-plane elastic buckling load of pin-ended circular steel tubular Vierendeel truss arches with a rectangular section under a uniform radial load is obtained. Then, limiting conditions of avoiding chord local buckling before the global elastic buckling of the arch are also derived. Lastly, the in-plane instability mechanisms and failure modes of the arch under a uniform radial load, a full-span uniform vertical load (FSUVL) and a half-span uniform vertical load (HSUVL) are investigated. It is found that the arch may undergo a global failure mode or three local failure modes under FSUVL and HSUVL. Based on the theoretical and finite element results, a design equation for the global strength of arches subjected to uniform compression is proposed. Strength design equations for global failure and local failure of arches subjected to FSUVL and HSUVL are also proposed. There is a good agreement between the prediction of the proposed design equations and the FE results.