Developing a typology for recently constructed buildings that combine steel frames and concrete walls

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2020
Authors
Pascua, Claire
Henry, Rick
Toma, Charlotte
Abstract

Recent building construction in New Zealand has exhibited a massive increase in the use of structural steel due to its availability and perceived seismic performance. Despite the renewed popularity of structural steel, concrete walls remain a reliable choice of lateral force resisting system, leading to a trend of 'hybrid' buildings that combine steel frames and concrete walls. This study aims to characterise this emerging building type by developing a typology that is relevant to understanding their seismic performance. It focusses on buildings constructed in Auckland and Christchurch from 2014 onwards. Through sidewalk surveys and desktop research, an initial list of buildings of interest was developed, and structural drawings were obtained from council property files or from structural engineers. The drawings were reviewed and relevant structural features were identified. A typology consisting of five building types was developed according to the buildings’ lateral load-resisting system in two directions. The results of this study will serve as basis for creating archetypes of steel frame-concrete wall buildings, which will be further investigated through testing and modelling.

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