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In-plane failure mechanisms and strength design of circular steel planar tubular Vierendeel truss arches
- Source :
- Engineering Structures. 151:488-502
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Vierendeel steel truss arches are often used in lighting zones of the spatial roof to obtain good permeability and lighting effects. They are different from conventional steel truss arches in terms of failure mechanism and strength design because they have only transverse tubes without diagonal tubes between chords. The chords of the Vierendeel truss arch undertake axial, bending and shear actions while the transverse tubes only resist the bending action. Hence, their structural design against strength is different from conventional steel truss arches. However, this aspect is not well analyzed in literature. This study analyzed the in-plane instability mechanism, failure mode and corresponding strength of the Vierendeel truss arch under a uniform radial load, a full-span uniform vertical load, a half-span uniform vertical load and their combinations. The global in-plane elastic buckling load of the arch under a uniform radial load is derived firstly and an interaction design formula for predicting the global in-plane strength of the arch under a uniform axial compression is proposed. It is found that the chords of the arch may fail in fully sectional plastic moment mode. Transverse tubes may fail because of the end moments. Slender enough arches may also undergo global failure. Strength design equations for local chord failure and for global failure of arches are developed. All of the equations proposed for predicting global in-plane elastic buckling, global in-plane ultimate strength and chord local strength of the arch agree quite well with the finite element results.
- Subjects :
- Engineering
business.industry
0211 other engineering and technologies
Truss
020101 civil engineering
02 engineering and technology
Structural engineering
Finite element method
0201 civil engineering
Transverse plane
Buckling
11. Sustainability
021105 building & construction
Ultimate tensile strength
Chord (music)
Arch
business
Failure mode and effects analysis
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 01410296
- Volume :
- 151
- Database :
- OpenAIRE
- Journal :
- Engineering Structures
- Accession number :
- edsair.doi...........15fe9e9599eeee1ba542a22c58d95154