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Abstract

The objective of this work is to investigate and compare, through an analytical study, the behaviour of perforated steel beams with different shape configurations and sizes of web openings. In this investigation the 'Vierendeel' failure mechanism of steel beams with web openings are examined through a Finite Element study. The shear and flexural failures of standard perforated sections are controlled mainly by the size (i.e. depth) of the web openings, while the 'Vierendeel' mechanisms is primarily controlled by the critical length of the web openings. Three main categories of web opening shape configurations and sizes are considered in this work. Standard, non-standard and elongated web opening configurations are examined, each with three different opening sizes. Four Advanced UB beams are used in the investigation in order to cover a range of sections and demonstrate the main differences in behaviour. The results of this comprehensive FE study are presented and include the position of plastic hinges, the critical opening length of perforated steel sections and the 'Vierendeel' parameters. The yield patterns and the failure modes do not differ dramatically. The results of this study are considered as relevant for practical applications as: (i) the reduction of the moment capacities of the tee-sections due to combination of axial and shear forces is smaller compared to the previous conservative linear interaction formula, and (ii) the formation of the initial plastic hinges at the low moment side (LMS) of the top tee-sections of the web openings does not usually cause failure, meaning that the beams can continue to carry additional load until all four plastic hinges are formed in the vicinity of the web openings and a 'Vierendeel' mechanism is fully eastablished.

Publication Type:	Conference or Workshop Item (Paper)
Additional Information:	In: ICASS '09/IJSSD - Proceedings of Sixth International Conference on Advances in Steel Structures and Progress in Structural Stability and Dynamics. 6th International Conference on Advances in Steel Structures: http://www.hkisc.org/
Publisher Keywords:	Perforated sections, shear-moment interaction curves, Vierendeel mechanism, non-linear Finite Element Analysis, coupled shear utilisation ratios, plastic hinges, various standard and non-standard web openings
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Departments:	School of Science & Technology > Engineering

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