Review of recently constructed concrete wall-steel frame hybrid buildings

Around New Zealand there has been an increasing trend of ‘hybrid’ multi-storey buildings that combine reinforced concrete walls with structural steel framing systems. This study aims to characterise and understand this type building, focusing on constructed in Auckland Christchurch from 2014 onwards. Drawings a total 50 were reviewed, their features documented, including building use, height, lateral load resisting system, ductility, wall configuration, construction method, system suspended floor system. Meetings engineers conducted validate the review findings further design principles decisions lead these outcomes. A typology comprising five types distinct load-resisting systems was proposed based review. Results showed regional differences between Christchurch, owing use seismic hazard respective cities. surveyed tended be residential storeys or higher made precast connected beams. buildings, other hand, primarily commercial three seven high dual frame-wall Structural connections frames also showing bolted headed stud embedment most common. The results can used identify critical aspects mixed for investigation develop archetype designs modelling testing.