Seismic performance of multi-storey cross laminated timber shear walls with high-capacity anchoring systems
Authors: Minghao Li, Ben Moerman, Thomas Wright, and Angela Liu
Report Number: 1978 / 20786
Abstract
New Zealand is a high seismic country and it is critical to design building structures with good seismic performance. Engineered timber products, such as cross laminated timber (CLT), laminated veneer lumber (LVL) and glue-laminated timber (glulam), are becoming popular for building construction in New Zealand and globally as they are considered as sustainable building products and offer cost competitive building solutions. This project aims to enhance seismic performance of multi-storey CLT buildings by developing robust and resilient CLT shear walls systems with high capacity anchoring connection systems. A total of 16 CLT hold-down connection specimens using self-tapping screws and steel brackets were tested to investigate their cyclic performance and the repair strategy for retrofitting. A total of 13 CLT shear wall specimens, including cantilever, multipanel, and hybrid coupled walls, were tested to investigate the overall cyclic performance with high capacity anchoring connections. Three walls were selected and repaired and their performance after repair was experimentally assessed.
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