Vibration performance of composite steel-bar truss slab with steel girder

Jiepeng Liu , Liang Cao , Y. Frank Chen

Abstract

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

Key Words

steel-bar truss slab; composite floor; human-structure interaction; vibration serviceability; crest factor

Address

(1) Jiepeng Liu, Liang Cao, Y. Frank Chen — School of Civil Engineering, Chongqing University, Chongqing 400045, China
(2) Jiepeng Liu, Liang Cao, Y. Frank Chen — Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400045, China.

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