Experimental Study and Numerical Simulation Analysis on Vertical Vibration Performances of 12 m Span Wood Truss Joist Floors

Abstract

Walking-induced vibration control in wood floors is a critical issue attracting the attention of many researchers and engineers. This paper presents an experimental study applying static deflection tests, modal tests, and pedestrian load tests to a series of full-scale 12 m span tooth plates connected to wood truss joist floors with strongbacks and partition walls. A comparison of the calculation error of vibration parameters between the theoretical formula and a numerical model was also conducted. The results show that strongbacks and partition walls effectively reduce both the vertical displacement and the root means acceleration at the center of the floor under pedestrian load but increases the natural frequency. The partition wall can achieve a better vibration-reduction effect than strongbacks. The error of the finite element model is higher than that of the theoretical formula. Using the theoretical formula in engineering wood floor design is recommended.

Experimental study and finite element analysis of heavy-duty escalator truss under full load conditions

“…Güldür et al focused on studying the bending property of cold-formed steel floor trusses constructed from lipped channel sections with concrete-filled compression chord member, and found the concrete infill within the compression chord member not only inhibited chord local/distortional buckling but also significantly enhanced the truss's performance by increasing its stiffness and load capacity 8 . Zhang et al analyzed the effects of partition walls and strongbacks on the vertical vibration performance of full-scale 12m span tooth plates affixed to wood truss joist floors, and found they could efficiently diminish vertical displacement and acceleration at the floor's center under pedestrian load while augment the natural frequency 9 . Based on a steel truss arched bridge with long span, Liu et al investigated the fatigue mechanism, cracking progression, and fatigue property assessment of an orthotropic steel bridge deck subjected to traffic loading 10 .…”