Evaluation of timber-concrete floor performance under occupant-induced vibrations using continuous monitoring

Piotr Omenzetter, Varun Kohli, Yohann Desgeorges

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

2 Downloads (Pure)

Abstract

This paper describes the design of a system to monitor floor vibrations in an office building and an analysis of several months' worth of collected data. Floors of modern office buildings are prone to occupant-induced vibrations. The contributing factors include long spans, slender and flexible designs, use of lightweight materials and low damping. As a result, resonant frequencies often fall in the range easily excited by normal footfall loading, creating potential serviceability problems due to undesirable levels of vibrations. This study investigates in-situ performance of a non-composite timber-concrete floor located in a recently constructed innovative multi-storey office building. The floor monitoring system consists of several displacement transducers to measure long-term deformations due to timber and concrete creep and three accelerometers to measure responses to walking forces, the latter being the focus of this paper. Floor response is typically complex and multimodal and the optimal accelerometer locations were decided with the help of the effective independence-driving point residue (EfI-DPR) technique. A novel approach to the EfI-DPR method proposed here uses a combinatorial search algorithm that increases the chances of obtaining the globally optimal solution. Several months' worth of data collected by the monitoring system was analyzed using available industry guidelines, including ISO2631-1: 1997(E), ISO10137: 2007(E) and SCI Publication P354. This enabled the evaluation of the floor performance under real operating conditions.

Original languageEnglish
Title of host publicationDamage assessment of structures X : selected peer reviewed papers from the 10th international conference on damage assessment of structures (DAMAS 2013), July 8-10, 2013, Dublin, Ireland
EditorsBiswajit Basu
Place of PublicationDurnten-Zurich
PublisherTrans Tech Publications Ltd
Pages230-237
Number of pages8
ISBN (Print)9783037857960
DOIs
Publication statusPublished - 16 Sep 2013
Event10th International Conference on Damage Assessment of Structures, DAMAS 2013 - Dublin, United Kingdom
Duration: 8 Jul 201310 Jul 2013

Publication series

NameKey Engineering Materials
Volume569-570
ISSN (Print)10139826

Conference

Conference10th International Conference on Damage Assessment of Structures, DAMAS 2013
CountryUnited Kingdom
CityDublin
Period8/07/1310/07/13

Keywords

  • Floor vibrations
  • Human-induced vibrations
  • Monitoring
  • Serviceability assessment
  • Timber-concrete floors

Fingerprint Dive into the research topics of 'Evaluation of timber-concrete floor performance under occupant-induced vibrations using continuous monitoring'. Together they form a unique fingerprint.

Cite this