Nonstructural Partitions and Floor Vibration Serviceability

Devin, A.; Fanning, Paul; Pavić, Aleksandar

doi:10.1061/(asce)ae.1943-5568.0000171

Cited by 13 publications

(9 citation statements)

References 21 publications

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“…It has been illustrated that non-structural elements can have significant effects on the dynamic responses of the floor systems of buildings; evidence for such effects was observed in determining the dynamic parameters of both slender floor systems [ 26 , 27 ] and traditional concrete floor systems, as detailed [ 28 ].…”

Section: Serviceability Testmentioning

confidence: 99%

Floor Vibration Experiment and Serviceability Test of iFLASH System

2020

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Studies on novel composite structures that can decrease floor height and improve constructional efficiency in order to increase spatial efficiency and lease revenue have been actively conducted. An innovative fire-proof, lightweight, absorbed, shallow, and hybrid (iFLASH) system was developed to solve construction site issues, such as improving constructability, reducing construction time, and attaining structural efficiency by reducing the weight of the building structure. This system can shorten the construction duration and decrease the floor height and structural weight, owing to features such as a low thickness and light weight. However, studies on the vibration characteristics of this new floor system have not been performed yet. As the general thickness of the iFLASH system ranges from 25 to 30 mm, it must have a sufficient floor vibration performance in order to be utilized. To evaluate the floor vibration performance of the iFLASH system, an experiment was performed in two buildings where the system was applied. This paper presents the results of the dynamic characteristics and serviceability testing as basic data for the vibration characteristics of the iFLASH system.

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Section: Serviceability Testmentioning

confidence: 99%

Floor Vibration Experiment and Serviceability Test of iFLASH System

2020

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“…Of these areas, the vibration response may have a predetermined limit in order to be assessed and if that limit exceeded what would be the probability of occurrence. Devin et al [118] also ascertained this method under a single person loading to produce a "contour plot of responses". In addition, there are a number of commercial software packages, such as Oasys GSA [119], Autodesk Robot Structural Analysis [120], SAP2000 [121] and ETABS [122], that define harmonic footfall analysis for a single person excitation at stationary positions based on design guidelines, such as Concrete Centre [27], SCI P354 [18] and AISC DG11 [17].…”

Section: Probabilistic Response Distributionmentioning

confidence: 99%

Review of Pedestrian Load Models for Vibration Serviceability Assessment of Floor Structures

et al. 2018

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Innovative design and technological advancements in the construction industry have resulted in an increased use of large, slender and lightweight floors in contemporary office buildings. Compounded by an ever-increasing use of open-plan layouts with few internal partitions and thus lower damping, floor vibration is becoming a governing limit state in the modern structural design originating from dynamic footfall excitations. This could cause annoyance and discomfort to building occupants as well as knock-on management and financial consequences for facility owners. This article presents a comprehensive review pertinent to walking-induced dynamic loading of low-frequency floor structures. It is intended to introduce and explain key walking parameters in the field as well as summarise the development of previous walking models and methods for vibration serviceability assessment. Although a number of walking models and design procedures have been proposed, the literature survey highlights that further work is required in the following areas; (1) the development of a probabilistic multi-person loading model which accounts for inter- and intra-subject variabilities, (2) the identification of walking paths (routes accounting for the effect of occupancy patterns on office floors) coupled with spatial distribution of pedestrians and (3) the production of a statistical spatial response approach for vibration serviceability assessment. A stochastic approach, capable of taking into account uncertainties in loading model and vibration responses, appears to be a more reliable way forward compared to the deterministic approaches of the past and there is a clear need for further research in this area.

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“…Regarding full-height non-structural partitions, Middleton and Pavic performed a modal test on a structure in various stages of construction and proved that the partitions can increase the overall frequency and local stiffness of the structure, with the damping of structure increasing as well [32]. Devin et al investigated the potential beneficial effects of nonstructural partitions on the vibration serviceability of a floor due to walking excitation through a finite-element model and found that the addition of nonstructural partitions successfully reduced floor acceleration and helped the floor to satisfy the vibration serviceability criterion for office floors [33]. Andersen et al focused on wooden floors built as an assembly of particleboard and timber joists with a finite element method and concluded that non-structural mass must be taken into account in a dynamic assessment of a wooden floor, which also has a significant effect on its modal properties [34].…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Decorative Surface Layer on the Dynamic Properties of a Symmetric Concrete Slab

et al. 2021

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In the past few years, the immense advances in building materials and construction techniques have inspired the development of large span, light, and flexible structures with low damping. The low frequency and low damping properties of the mentioned structures result in the problem of serviceability caused by human-induced vibrations. An evaluation of the serviceability of a structure requires obtaining the modes and natural frequencies of the structure via the finite element method (FEM). In the design stage, the structural model considers the contribution of involved elements made to the stiffness of the whole structure, such as beams, slabs, and columns, while the decorative surface layer above the floor is often regarded as an additional mass, regardless of its contribution to the stiffness of the floor slab. In this study, the dynamic properties of a symmetric concrete slab were tested with an ambient excitation method to obtain the dynamic properties of the original empty structure and the structure decorated with a tiled surface, a marble surface, and a terrazzo surface, respectively. The results show that the first-order natural frequencies of floor slabs decorated with tile, marble, and terrazzo finishes are decreased compared to the original empty structure, while the second- and third-order ones are increased, which indicates that it is improper to treat decorative finishes purely as an additional mass. By equating the decorative layer to a certain thickness of additional concrete layer in the finite element model, it is found that, if the decorative surface layer is equated to a 29–31mm thick additional layer and the weight of the equivalent additional layer is the same as that of the actual decorative surface, the simulation results will be in good agreement with the measured results. Moreover, the test results indicate that the first-order shape function of the structure is symmetric and its second- and third-order shape functions are antisymmetric, which is consistent with the results of simulations under FEM method. This provides a basis for designers to evaluate the contribution of the additional layers in structural serviceability analysis.

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Nonstructural Partitions and Floor Vibration Serviceability

Cited by 13 publications

References 21 publications

Floor Vibration Experiment and Serviceability Test of iFLASH System

Floor Vibration Experiment and Serviceability Test of iFLASH System

Review of Pedestrian Load Models for Vibration Serviceability Assessment of Floor Structures

The Effect of the Decorative Surface Layer on the Dynamic Properties of a Symmetric Concrete Slab

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