Dynamic performance assessment of a multi-story timber building via long-term seismic monitoring and model updating

Andrew Gaul, Simon Jager, Piotr Omenzetter, Hugh Morris

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

Abstract

The Nelson Marlborough Institute of Technology Arts building is the world’s first commercial implementation of a post tensioned Laminated Veneer Lumber (LVL) shear wall system based on EXPAN technology. In order to understand the response of the building in a serviceability level seismic event, System Identification using dynamic monitoring data, Finite Element (FE) modelling, model updating and time history analysis was performed. Several modal frequencies, damping ratios and mode shapes were identified form the seismic response records. Model updating estimated a 16% increase in the stiffness of LVL structural elements, an approximate 90% decrease in concrete, and nearly nil contribution of cladding to stiffness. An estimation of the serviceability response was made based on a single degree of freedom system time history analysis. It was concluded the NMIT building performs well under serviceability seismic loading. The maximum deflection of a 1/25 year event was estimated to be 8mm.
Original languageEnglish
Title of host publicationProceedings of the New Zealand Society for Earthquake Engineering Annual Conference 2012
Number of pages8
DOIs
Publication statusPublished - 13 Apr 2012

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    Gaul, A., Jager, S., Omenzetter, P., & Morris, H. (2012). Dynamic performance assessment of a multi-story timber building via long-term seismic monitoring and model updating. In Proceedings of the New Zealand Society for Earthquake Engineering Annual Conference 2012 https://doi.org/10.13140/2.1.1575.5842