TY - JOUR
T1 - Vibration performance of composite steel-bar truss slab with steel girder
AU - Liu, Jiepeng
AU - Cao, Liang
AU - Chen, Y. Frank
N1 - Funding Information:
The authors are grateful to the supports provided by the National Natural Science Foundation of China (Grant No. 51622802, 51438001) and National Key Research and Development Program of China (Project No. 2016YFC0701201).
Publisher Copyright:
Copyright © 2019 Techno-Press, Ltd.
PY - 2019
Y1 - 2019
N2 - In this study, on-site testing was carried out to investigate the vibration performance of a composite steel-bar truss slab with steel girder system. Ambient vibration was performed to capture the primary vibration parameters (natural frequencies, damping ratios, and mode shapes). The composite floor possesses low frequency (< 10 Hz) and damping (< 2%). Based on experimental, theoretical, and numerical analyses on natural frequencies and mode shapes, the boundary condition of SCSC (i.e., two opposite edges simply-supported and the other two edges clamped) is deemed more reasonable for the composite floor. Walking excitations by one person (single excitation), two persons (dual excitation), and three persons (triple excitation) were considered to evaluate the vibration serviceability of the composite floor. The measured acceleration results show a satisfactory vibration perceptibility. For design convenience and safety, a crest factor βrp describing the ratio of peak acceleration to root-mean-square acceleration induced from the walking excitations is proposed. The comparisons of the modal parameters determined by ambient vibration and walking tests reveal the interaction effect between the human excitation and the composite floor.
AB - In this study, on-site testing was carried out to investigate the vibration performance of a composite steel-bar truss slab with steel girder system. Ambient vibration was performed to capture the primary vibration parameters (natural frequencies, damping ratios, and mode shapes). The composite floor possesses low frequency (< 10 Hz) and damping (< 2%). Based on experimental, theoretical, and numerical analyses on natural frequencies and mode shapes, the boundary condition of SCSC (i.e., two opposite edges simply-supported and the other two edges clamped) is deemed more reasonable for the composite floor. Walking excitations by one person (single excitation), two persons (dual excitation), and three persons (triple excitation) were considered to evaluate the vibration serviceability of the composite floor. The measured acceleration results show a satisfactory vibration perceptibility. For design convenience and safety, a crest factor βrp describing the ratio of peak acceleration to root-mean-square acceleration induced from the walking excitations is proposed. The comparisons of the modal parameters determined by ambient vibration and walking tests reveal the interaction effect between the human excitation and the composite floor.
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U2 - 10.12989/scs.2019.30.6.577
DO - 10.12989/scs.2019.30.6.577
M3 - Article
AN - SCOPUS:85065245446
SN - 1229-9367
VL - 30
SP - 577
EP - 589
JO - Steel and Composite Structures
JF - Steel and Composite Structures
IS - 6
ER -