Optimum position of steel outrigger system for high rise composite buildings subjected to wind loads

Fawzia, Sabrina & Fatima, Tabassum (2016) Optimum position of steel outrigger system for high rise composite buildings subjected to wind loads. Advanced Steel Construction, 12(2), pp. 134-153.

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The responses of composite buildings under wind loads clearly become more critical as the building becomes taller, less stiff and more lightweight. When the composite building increases in height, the stiffness of the structure becomes more important factor and introduction to belt truss and outrigger system is often used to provide sufficient lateral stiffness to the structure. Most of the research works to date is limited to reinforced concrete building with outrigger system of concrete structure, simple building plan layout, single height of a building, one direction wind and single level of outrigger arrangement. There is a scarcity in research works about the effective position of outrigger level on composite buildings under lateral wind loadings when the building plan layout, height and outrigger arrangement are varied. The aim of this paper is to determine the optimum location of steel belt and outrigger systems by using different arrangement of single and double level outrigger for different size, shape and height of composite building. In this study a comprehensive finite element modelling of composite building prototypes is carried out, with three different layouts (Rectangular, Octagonal and L shaped) and for three different storey (28, 42 and 57-storey). Models are analysed for dynamic cyclonic wind loads with various combination of steel belt and outrigger bracings. It is concluded that the effectiveness of the single and double level steel belt and outrigger bracing are varied based on their positions for different size, shape and height of composite building.

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ID Code: 86210
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Steel structure, Lateral deflection, Outriggers, Composite building, Multistorey, Wind load
DOI: 10.18057/IJASC.2016.12.2.4
ISSN: 1816-112X
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 The Hong Kong Institute of Steel Construction
Deposited On: 04 Aug 2015 23:49
Last Modified: 20 Jun 2016 04:24

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