Statistical evaluation of the bearing capacity of short polygonal columns

Proceedings of the International Colloquia on Stability and Ductility of Steel Structures (SDSS 2019), September 11-13, 2019, Prague, Czech Republic

Document identifier: oai:DiVA.org:ltu-77605
Keyword: Engineering and Technology, Civil Engineering, Other Civil Engineering, Teknik och teknologier, Samhällsbyggnadsteknik, Annan samhällsbyggnadsteknik, Byggkonstruktion, Structural Engineering
Publication year: 2019
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Abstract:

Regular convex polygon sections (RCPS) are commonly used as towers supporting transmission lines, stadium lightning and street lamps. Their use provides advantages in the bearing capacity and can simplify erection. Over the last 50 years experimental studies have been conducted to check the applicability of the plate theory to stocky polygonal columns. The paper presents the processed data gathered from compression tests found in the literature. Results from 70 specimens tested under pure compression were statistically analysed. Specimens with yield strength varying from 235 to 700 MPa and angles varying from 144 to 175.5 (5 to 40 sides) were investigated. The local non-dimensional slenderness was calculated using buckling lengths according to EN 1993-1-3 and EN 1993-1-5 with values ranging from 0.55 to 4.52. The objective of the paper was to compare the plate buckling resistance predictions to the experimental results. The paper concludes with a buckling width recommendation for evaluating the critical stress as calculated according to EN 1993-1-3 or EN 1993-1-5.

Authors

Gabriel Sabau

Luleå tekniska universitet; Byggkonstruktion och brand
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Efthymios Koltsakis

Luleå tekniska universitet; Byggkonstruktion och brand
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Ove Lagerqvist

Luleå tekniska universitet; Byggkonstruktion och brand
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