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Long-term loading effect on vibration performance of CLT floors: An 896-day monitoring study

Lookup NU author(s): Dr Haoyu HuangORCiD

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

Timber, a viscoelastic material, undergoes deformation over time when exposed to sustained loads, a process known as creep. Its rising popularity as a construction material, especially for timber floors, is notable. However, the influence of creep on the dynamic characteristics of timber floors, such as their natural frequency and vibration response, is not well studied. This research focused on how long-term loading (creep) affects the vibration behaviours of a cross-laminated timber (CLT) floor. A full-scale CLT floor was constructed in a lab and subjected to long-term loading using sandbags. Over 896 days, the centroid point deflection and environmental conditions (temperature and relative humidity) were monitored. Human-induced vibration tests were carried out at the beginning, throughout, and at the end of this period. The vibration response, measured in terms of the Vibration Dose Value (VDV), was assessed at various stages of long-term loading. The findings showed a moderate positive correlation between the creep deflection and environmental conditions. The fundamental frequency slightly increased over time due to creep, and a general decrease in VDV was observed as the creep advanced.


Publication metadata

Author(s): Zhang J, Huang H, Wang BJ

Publication type: Article

Publication status: Published

Journal: Engineering Structures

Year: 2024

Volume: 316

Issue: 1

Print publication date: 01/10/2024

Online publication date: 05/07/2024

Acceptance date: 01/07/2024

Date deposited: 06/07/2024

ISSN (print): 0141-0296

ISSN (electronic): 1873-7323

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.engstruct.2024.118562

DOI: 10.1016/j.engstruct.2024.118562

Data Access Statement: Data will be made available on request.


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Funding

Funder referenceFunder name
Newcastle University

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