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Steel and Composite Structures Volume 46, Number 4, February25 2023 , pages 577-589 DOI: https://doi.org/10.12989/scs.2023.46.4.577 |
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Experimental study on vibration serviceability of cold-formed thin-walled steel floor |
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Bin Chen, Liang Cao, Faming Lu and Y. Frank Chen
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| Abstract | ||
| In this study, on-site testing was carried out to investigate the vibration performance of a cold-formed thin-walled steel floor system. Ambient vibration, walking excitation (single and double persons), and impulsive excitation (heel-drop and jumping) were considered to capture the primary vibration parameters (natural frequencies, damping ratios, and mode shapes) and vertical acceleration response. Meanwhile, to discuss the influence of cement fiberboard on structural vibration, the primary vibration parameters were compared between the systems with and without the installation of cement fiberboard. Based on the experimental analysis, the cold-formed thin-walled steel floor possesses high frequency (〉10 Hz) and damping (〉 2%); the installed cement fiberboard mainly increases the mass of floor system without effectively increasing the floor stiffness and may reduce the effects of primary vibration parameters on acceleration response; and the human-structure interaction should be considered when analyzing the vibration serviceability. The comparison of the experimental results with those in the AISC Design Guide indicates that the cold-formed thin-walled steel floor exhibits acceptable vibration serviceability. A crest factor Brp (ratio of peak to root-mean-square accelerations) is proposed to determine the root-mean-square acceleration for convenience. | ||
| Key Words | ||
| cement fibreboard; cold-formed thin-walled steel floor; human-structure interaction; on-site testing; vibration serviceability | ||
| Address | ||
| Bin Chen:Chengdu Architectural Design & Research Institute Co., LTD. Chengdu China, 610041 Liang Cao:1)College of Civil Engineering, Hunan University, Changsha 410082, China 2)Key Laboratory for Damage Diagnosis of Engineering Structures of Hunan Province, Hunan University, Changsha 410082, China Faming Lu:Chengdu Architectural Design & Research Institute Co., LTD. Chengdu China, 610041 Y. Frank Chen:Department of Civil Engineering, The Pennsylvania State University, Middletown, PA, 17057, USA | ||