The 5-storey residential retirement building faced severe torsional issues due to its irregular plan. Previous assessments identified deficiencies in diaphragm strength, cladding connections, and stair movement.
The original, proposed strengthening was extensive, intrusive and costly.
Miyamoto New Zealand’s approach used non-linear time history analysis to assess the building's performance, revealing significant ductile reinforcement in the floors. This enabled a reduction in the scope of work to focus on non-structural elements like cladding panels and stairs
The outcome of this project was one of significant benefit to the client. The demolition of the retirement village structures was avoided, and strengthening was undertaken at a minor cost.
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