TY - CHAP
T1 - Evaluation of timber-concrete floor performance under occupant-induced vibrations using continuous monitoring
AU - Omenzetter, Piotr
AU - Kohli, Varun
AU - Desgeorges, Yohann
PY - 2013/9/16
Y1 - 2013/9/16
N2 - 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.
AB - 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.
KW - Floor vibrations
KW - Human-induced vibrations
KW - Monitoring
KW - Serviceability assessment
KW - Timber-concrete floors
UR - http://www.scopus.com/inward/record.url?scp=84883658532&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.569-570.230
DO - 10.4028/www.scientific.net/KEM.569-570.230
M3 - Chapter (peer-reviewed)
AN - SCOPUS:84883658532
SN - 9783037857960
T3 - Key Engineering Materials
SP - 230
EP - 237
BT - Damage 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
A2 - Basu, Biswajit
PB - Trans Tech Publications Ltd
CY - Durnten-Zurich
T2 - 10th International Conference on Damage Assessment of Structures, DAMAS 2013
Y2 - 8 July 2013 through 10 July 2013
ER -