The natural frequencies of composite Profiled Steel Sheet Dry Board with Concrete infill (PSSDBC) system

Abstract

This paper aims to measure natural frequencies of Profiled Steel Sheet Dry Board (PSSDB) with Concrete infill (PSS-DBC) system. For this purpose, experimental tests by estimation of Frequency Response Function (FRF) and a numerical method by development of Finite Element Model (FEM) are used. The connection stiffness between Peva45 as Profiled Steel Sheet (PSS) and different concrete grades of 25 (C25), 30 (C30), and 35 (C35) are measured by pushout tests to be used in the FEM. The effect of presence of concrete in the PSSDB system on the natural frequencies such as Fundamental Natural Frequency (FNF) of the system is investigated. The variability in the FNF of the studied system under different parameters such as concrete grades, thicknesses of PSS and Dry Board (DB), and boundary conditions is determined. In a wide numerical study, the FNF of the PSSDBC system with practical dimensions is revealed for different lengths, widths, and boundary conditions. The results help designer predict serviceability and design criteria of the studied panels. Keywords natural frequency, profiled steel sheet dry board, frequency response function, modal analysis, push-out test, low and high frequency floors, human comfort.

Dynamic response of low frequency Profiled Steel Sheet Dry Board with Concrete infill (PSSDBC) floor system under human walking load

“…Gandomkar et al [18] estimated damping ratios of bare PSSDBC panels with such characteristics as: width and length of 795 mm and 2400 mm respectively, and thicknesses of 0.8 mm and 18 mm respectively for PSS and DB, 200 mm screw spacing, and concrete grade of 30 (C30) where the panels were located on pin-roller end supports. Damping ratios of 2.90%, 1.52%, 0.83%, and 2.54% were found for the first four vibration modes, respectively.…”

“…The connection between Peva45 and concrete as an infill in trough of Peva45 is also a partial interaction problem. Gandomkar et al [18] focused on finding the connection stiffness between Peva45 and concrete with different grades of C25, C30, and C35 by push-out tests where covering was chosen as plywood. The shear stiffness of this connection was obtained as 386 kN/mm and 417.60 kN/mm respectively for C30 and C35 where spacing between the springs was considered as 200 mm.…”

“…In addition, Gandomkar et al [18] showed experimentally and numerically that in practical dimensions of floors, the FNF of the PSSDBC system is lower than the PSSDB system and is in the category of LFF. Therefore, the PSSDBC floor panels with usual spans are exposed to vibrations of human activities, because the FNF of a LFF is close to frequency range of human activities.…”

Experimental Tests on Bending Behavior of Profiled Steel Sheeting Dry Board Composite Floor with Geopolymer Concrete Infill

“…The geopolymer concrete, in addition to being eco-friendly is high strength and expected to improve the structural performance of the PSSDB floor system in terms of stiffness and strength. Previous research involving normal concrete infill in PSSDB floors have been reported in Shodiq (2004), , Seraji et al (2013), and Gandomkar et al (2011 and. Shodiq (2004) has demonstrated that the stiffness and strength of the PSSDB floor system with normal concrete infill is 20.2% and 61.0% higher than the one without infill.…”

“…The PSSDB in its original form was envisaged by Wright et al (1989) as an alternative to the traditional timber plank and joist floor system in the United Kingdom. Research works have since been conducted on the PSSDB system in its applications as flooring, roofing, and walling units (Ahmed et al (2000 and, , , 2005, Akhand et al (2004), Gandomkar et al (2011Gandomkar et al ( , 2012Gandomkar et al ( , 2013aGandomkar et al ( and 2013b, Seraji et al (2012)). This paper reports on the research work conducted on the PSSDB floor system introducing geopolymer concrete (Abdullah et.…”