Assessment of dynamic and long-term performance of an innovative multi-story timber building via structural monitoring and dynamic testing
2012
An innovative three-story timber building, using self-centering, post-tensioned timber shear walls as the main horizontal
load resisting system and lightweight non-composite timber-concrete floors, has recently been completed in Nelson, New
Zealand. It is expected to be the trailblazer for similar but taller structures to be more widely adopted. Performance based
standards require an advanced understanding of building responses and in order to meet the need for in-situ performance
data the building has been subjected to forced vibration testing and instrumented for continuous monitoring using a total
of approximately 90 data channels to capture its dynamic and
long-term responses. The first part of the paper presents a
brief discussion of the existing research on the seismic performance of timber frame buildings and footfall induced floor
vibrations. An outline of the building structural system, focusing on the novel design solutions, is then discussed. This is
followed by the description of the monitoring system. The analysis of monitoring results starts with a discussion of the
monitoring of long-term deformations. Next, the assessment of the floor vibration serviceability performance is outlined.
Then, the forced vibration tests conducted on the whole building at different construction stages are reviewed. The
system identification results from seismic shaking records are also discussed. Finally, updating of a finite element model
of the building is conducted.
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