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Open AccessArticle

Fast Checking of Drift Demand in Multi-Storey Buildings with Asymmetry

1
Department of Infrastructure Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
2
Bushfire and Natural Hazards Cooperative Research Centre, Melbourne, VIC 3002, Australia
3
Faculty of Engineering, Computing and Science, Swinburne University of Technology, Kuching, Sarawak 93350, Malaysia
*
Author to whom correspondence should be addressed.
Buildings 2021, 11(1), 13; https://doi.org/10.3390/buildings11010013
Received: 25 November 2020 / Revised: 22 December 2020 / Accepted: 23 December 2020 / Published: 28 December 2020
Buildings possessing an asymmetrical arrangement of structural elements are torsionally unbalanced and can be vulnerable in a seismic event. Building codes of practices typically recommend the use of three-dimensional dynamic analysis to determine the seismic demands of a multi-storey building. Whilst most design practices are well equipped with commercial software for undertaking such analyses, designers often find it difficult to verify results. Much of the published technical articles present findings for buildings based on an idealised single-storey model. As a result of challenges in dealing with real multi-storey buildings, there has been very limited uptake of research findings in design practices. This article presents a three-tiered approach of estimating the displacement behaviour of the building in term of 3D/2D displacement ratio. The estimate can be used for verifying results reported from a computer package conveniently. The quick method provides predictions of the 3D/2D ratio and only requires the gross plan dimensions of the building to be known. The refined method requires knowledge of the torsional stiffness properties to be known, whereas the detailed method requires the eccentricity properties to be known as well. The proposed methodology is robust and reliable, as is demonstrated by case studies undertaken on six real multi-storey buildings. View Full-Text
Keywords: simplified analysis method; torsion; torsional amplification; 3D to 2D displacement ratio; torsional parameters; asymmetric building; reinforced concrete building; displacement behaviour; displacement demands simplified analysis method; torsion; torsional amplification; 3D to 2D displacement ratio; torsional parameters; asymmetric building; reinforced concrete building; displacement behaviour; displacement demands
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MDPI and ACS Style

Khatiwada, P.; Lumantarna, E.; Lam, N.; Looi, D. Fast Checking of Drift Demand in Multi-Storey Buildings with Asymmetry. Buildings 2021, 11, 13. https://doi.org/10.3390/buildings11010013

AMA Style

Khatiwada P, Lumantarna E, Lam N, Looi D. Fast Checking of Drift Demand in Multi-Storey Buildings with Asymmetry. Buildings. 2021; 11(1):13. https://doi.org/10.3390/buildings11010013

Chicago/Turabian Style

Khatiwada, Prashidha; Lumantarna, Elisa; Lam, Nelson; Looi, Daniel. 2021. "Fast Checking of Drift Demand in Multi-Storey Buildings with Asymmetry" Buildings 11, no. 1: 13. https://doi.org/10.3390/buildings11010013

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