A numerical modelling framework for vibration assessment of timber composite floors in mass timber buildings
Date
2025
Authors
Cheraghi-shirazi, Najmeh
Creagh, Ariel
Setiawan, Fendy
Parra, Roger
Khoshkbari, Parham
Malek, Sardar
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Building Engineering
Abstract
Timber composite floors are vulnerable to human-induced vibrations due to their low weight and long spans used in office buildings. Introducing concrete into timber panels is a common approach to enhance the vibration performance of long-span timber floors. While the effects of certain parameters on the vibration performance of timber composite floors have been extensively studied in laboratory settings, and some numerical models have been proposed, predictions are often sensitive to variations in input parameters. Many of these numerical models are "calibrated" using test data from specific experiments (e.g., connection or 4-point bending tests) conducted on specific laboratory floors and may not be applicable to real building floors. This paper presents a comprehensive physics-based finite element (FE) modelling framework aimed at accurately predicting the vibration characteristics (i.e. frequency and acceleration) of long-span Timber Concrete Composite (TCC) floors and understanding the vibration response of composite floors. The accuracy of the approach is examined by comparing modelling predictions against test data for a 9 m (?30 ft) composite floor within a real office building. The application of analytical equations for predicting floor static stiffness, and frequency, and limitations of simple approaches suggested in some standards are discussed. The developed framework is shown to be a valuable tool for benchmarking the impact of various boundary conditions and input parameters recommended in design guides. Specifically, the effects of key parameters, including the dynamic modulus of concrete, shear stiffness of glulam beam-to-CLT and CLT-to-concrete connectors, and the stiffness of beam-to-beam connections are demonstrated and discussed.
Description
Keywords
mass timber, vibration, numerical modelling, timber composite floors, frequency, time history acceleration, gamma method, Euler-Bernoulli beam theory, connections, connector's shear stiffness, Centre for Advanced Materials and Related Technology (CAMTEC)
Citation
Cheraghi-Shirazi, N., Creagh, A., Setiawan, F., Parra, R., Khoshkbari, P., & Malek, S. (2025). A numerical modelling framework for vibration assessment of timber composite floors in mass timber buildings. Journal of Building Engineering, 106, 112605. https://doi.org/10.1016/j.jobe.2025.112605