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

Abstract

This paper investigates the dynamic response of a composite structural system known as Profiled Steel Sheet Dry Board with Concrete infill (PSSDBC) to evaluate its vibration serviceability under human walking load. For this point, thirteen (13) PSSDBC panels in the category of Low Frequency Floor (LFF) were developed using Finite Element Method (FEM). The natural frequencies and mode shapes of the studied panels were determined based on the developed finite element models. For more realistic evaluation on dynamic response of the panels, dynamic load models representing human walking load were considered based on their Fundamental Natural Frequency (FNF), and also time and space descriptions. The peak accelerations of the panels were determined and compared to the limiting value proposed by the standard code ISO 2631-2. Effects of changing thickness of the Profiled Steel Sheet (PSS), Dry Board (DB), screw spacing, grade of concrete, damping ratio, type of support, and floor span on the dynamic responses of the PSSDBC panels were assessed. Results demonstrated that although some factors reduced dynamic response of the PSSDBC system under human walking load, low frequency PSSDBC floor system could reach high vibration levels resulting in lack of comfortableness for users. Keywords structural composite floor system, profiled steel sheet dry board, vibration serviceability, human walking load, dynamic response, human comfort.

Dynamic response of low frequency Profiled Steel Sheet Dry Board (PSSDB) floor system

“…Comparing the results of this study and study of Gandomkar et al [19] shows that the presence of concrete grade 30 can reduce the peak accelerations of PSSDB panels. These reductions were determined by an average on all the studied panels by 16.5%, 15.8%, 17.1%, and 23.5% respectively for load models I, II, III, and IV.…”

“…Twelve PSSDB panels were considered to illustrate effects of different parameters such as boundary conditions, damping ratio, thicknesses of the PSS and DB, screw spacing, and floor span on the dynamic responses of the studied panels. In addition, according to results of this study and research of Gandomkar et al [19], effect of presence of concrete on the dynamic response of the PSSDB system was demonstrated. Firstly, natural frequencies and vibration modes of all panels were obtained.…”

“…The PSSDB with in-filled concrete is called PSSDBC. Gandomkar et al [19] determined dynamic response of the PSSDBC panels with various conditions under human walking load to evaluate their comfortableness. It was reported that since the PSSDB system is slender and flexible in its nature, the natural frequency of the floor system may be low and becomes perceivable to users [20].…”

“…This paper investigates the dynamic response of the low frequency PSSDB floor system used as offices and residences under human walking load, with the same aspect like the work of Gandomkar et al [19]. Twelve PSSDB panels were considered to illustrate effects of different parameters such as boundary conditions, damping ratio, thicknesses of the PSS and DB, screw spacing, and floor span on the dynamic responses of the studied panels.…”

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