Novel Digitally-manufactured Wooden Beams for Vibration Reduction

Abstract

The low modal mass and stiffness of timber floors impose a number of motioncontrol challenges to the structural designer. These difficulties can often led to the implementation of sub-optimal solutions, such as the addition of supplemental mass and stiffness in the form of concrete slabs, that conflict with the claimed sustainability and lightweight advantages of wood. In this paper, we present a novel beam configuration that enhances the vibration comfort response of timber flooring systems while retaining the original environmental benefits of wood in construction. By taking advantage of modern digital-fabrication tools, we devise, test and analyse new beam configurations that incorporate flexural resonators tuned to key structural frequencies of the system. These resonators are integrated into the body of the beam and the structure is sized to satisfy typical strength and stiffness demands. A series of numerical, experimental and parametric studies demonstrate the vibration absorbing capabilities of the new designs and the feasibility of their implementation to satisfy current occupant comfort criteria.

Investigation of a vibration mitigation method based on crowd flow control on a footbridge

“…There is a typical example of a rectangular obstacle in Fig. 2, in which pedestrians can only see one side of the obstacle in the area (2), ( 4), (5) and two sides in the area (1), (3). Thus, they are subjected to the repulsive psychological force…”

“…This problem can be exemplified by lateral vibration of the London Millennium Footbridge [1], and lateral and vertical vibration of the Pedro e Ines footbridge [2]. To effectively address this problem, several measures of vibration mitigation control have been analyzed in recent studies to reduce vibration and prevent potential structural damage [3,4].…”

Effectiveness of Connections Type on Vibration Response of Steel Beam

“… Málaga-Chuquitaype and Ilkanaev (2018) presented the improvement of incorporate resonators in new novel beam configuration and how it can enhance the vibration comfort response of timber flooring systems while retaining the original environmental benefits of wood in construction by using finite element simulation, the results pointed out the dynamic advantages of using the new novel beam; decreasing the peak displacement has been noticed when the steady-state analysis was conducted. Furthermore, when performing a hammer impact test, the acceleration at mid span has been decreased significantly [5].…”

In-plane compression behavior of FDM-manufactured hierarchical and hybrid hierarchical hexagonal honeycombs for infrastructural safety applications

“…FDM process has been used frequently for manufacturing such structures. 13, 16, 19, 26 This process has been used widely in manufacturing microelectromechanical systems (MEMS). 27, 28 The manufactured samples were tested for in-plane compression behavior under uniaxial loading and analyzed in detail.…”