Experimental and analytical study on dynamic performance of timber floor modules (timber beams)

Rijal, Rajendra; Samali, Bijan; Shrestha, Rijun; Crews, Keith

doi:10.1016/j.conbuildmat.2016.06.027

Cited by 21 publications

(12 citation statements)

References 3 publications

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“…The damping ratios found both for the laboratory floors and the in-situ floors are higher than those indicated by other researchers. As stated before, the ranges of damping ratios reported by other studies were between 0.52% and 4.78% for laboratory floors [3][4][5][6][7][8] and between 0.47% and 9.10% for in-situ floors [9][10][11][12]. These values contrast to some extent with the ranges reported in the present study, which were between 1.9% and 4.9% for laboratory floors and from 4.3% to 14.8% for in-situ floors.…”

Section: Fundamental Damping Ratioscontrasting

confidence: 90%

“…The damping ratios obtained in these floors had values from 0.82% to 4.78% for the first resonant mode. Subsequently, research focused on studying timber floors that could reach greater span lengths, between 6 m and 8 m. In this way, studies were carried out on timber floors built with laminated veneer lumber beams (LVL) [7], and cross-laminated timber (CLT)-concrete composite slabs [8]. Damping ratios between 0.52% and 1.29% for the first resonant mode were found for these floors.…”

Section: Introductionmentioning

confidence: 99%

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Damping Assessment of Lightweight Timber Floors Under Human Walking Excitations

2019

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Vibrations on timber floors are among the most common serviceability problems in social housing projects. The presence of low damping levels on these floors could cause excessive vibrations in a range of frequency and amplitude that generate discomfort in users. This study focuses on the influence of the damping ratio in the dynamic serviceability of social housing timber floors due to walking excitations. More than 60 human-walking vibration tests were conducted on both laboratory and in-situ timber floors. The floors were instrumented with accelerometers, and fundamental modal damping ratios were estimated by applying Enhanced Frequency Decomposition Domain (EFDD) and Subspace Stochastic Identification (SSI) methods. The vibration dose value (VDV) was used to estimate the dynamic serviceability of floors. The results indicated that timber floors had an impulsive-type vibration response, with fundamental damping ratios between 1.9% and 14.8%, depending on their constructive characteristics. The in-situ floors had damping ratios between two to three times greater than the laboratory floors due to the presence of non-structural elements. Finally, it was possible to demonstrate that the floors with the highest damping ratios reached lower vibration dose values and, therefore, a better dynamic serviceability performance.

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Section: Fundamental Damping Ratioscontrasting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Damping Assessment of Lightweight Timber Floors Under Human Walking Excitations

2019

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“…There have been many studies examining various methods to improve the quality of plantbased building materials. One of the applicable techniques is plastering with another stiffer material, such as concrete plaster, that has been implemented in wooden floor cases (Rijal et al, 2016). Composite construction is a mixed construction of several materials with different characteristics that result in synergetic construction elements with the same behavior, especially when they withstand loads (Singgih Prasetyo et al, 2016).…”

Section: Composite Construction Materialsmentioning

confidence: 99%

The Potential of the Bebak Wall Protection Technique on Increasing Construction Stability and Material Bond Strength

Pradipto

Afif

2020

arsi

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Bebak, the local building material of East Nusa Tenggara, has long been used as the primary building material, especially as wall material. However, bebak wall construction commonly used today is not yet ideal in terms of its material protection and function. Bebak is a relatively quick damage construction due to termites, which eventually causes the enclosed space's thermal conditions less comfortable. This research is part of the quality improvement program of healthy housing in that region, which focuses on bebak wall protection by plastering the wall with concrete plaster. Two scale models were examined; a wall plastered only on one side, and a wall plastered on both sides. By using a simple construction approach, the research aims to evaluate the bebak protection technique's effects on the construction stability and the bond strength between the bebak composite wall materials. The results of visual evaluations revealed that single-sided plaster on bebak walls could maintain the construction stability and the bond strength of the composite material better than the double-sided one. Furthermore, the evaluation also reveals additional benefits of the plastered walls for the users, such as adaptability and simplicity of modular wall replication to build affordable healthy housing.

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“…The application results showed that: with the help of the forced vibration response data, the calculation of its curvature could better identify the damage of the wooden floor structure, Damage location and degree of damage. Rijal et al [8] used force hammer excitation and evaluated the vibration performance of wooden floor modules with spans of 6 m and 8 m based on dynamic characteristic parameters such as natural frequency, damping ratio, and mode shape. Matsushitas et al [9] established a finite element model of the piezoelectric device and the floor structure and proposed a prediction method to reduce the floor vibration using the control system of the thin-film piezoelectric device.…”

Section: Introductionmentioning

confidence: 99%

Research on dynamic characteristics test of wooden floor structure for gymnasium

Guo¹

2021

Sustain. Struct.

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In order to better evaluate the structural performance of the wooden floor used in the gymnasium and realize the structural optimization design, this research considered two gymnasium’s floors in Nanjing as the research object and used the transient excitation method to test the natural frequency and damping ratio parameters of the three types of floor structures. The results showed that three kinds of floor structures all meet the requirements of building comfort; under the premise that the types and specifications of the constituent materials were the same, the order of the damping ratios of the three kinds of floor structures from large to small was: the fixed floor structure with double-layer load distribution strip, the suspended floor structure with single-layer load distribution strip, and the suspended floor structure with double-layer load distribution strip; compared with the fixed floor structure, the suspended floor structure had low damping ratio characteristics, the energy dissipation was slow during structural vibration, which means its impact absorption rate was small, and its impact buffering ability was good. The integral structure had good resilience performance; compared with the floor structure using single-layer load distribution strip. The floor structure using a double-layer load distribution strip had a low damping ratio characteristic. The absorption rate of the structure was small and the resilience performance was good. The research conclusion had certain engineering application value.

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Experimental and analytical study on dynamic performance of timber floor modules (timber beams)

Cited by 21 publications

References 3 publications

Damping Assessment of Lightweight Timber Floors Under Human Walking Excitations

Damping Assessment of Lightweight Timber Floors Under Human Walking Excitations

The Potential of the Bebak Wall Protection Technique on Increasing Construction Stability and Material Bond Strength

Research on dynamic characteristics test of wooden floor structure for gymnasium

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