Dynamic characteristics of light-frame wood buildings

Hafeez, Ghazanfarah; Doudak, Ghasan; McClure, Ghyslaine

doi:10.1139/cjce-2017-0266

Cited by 13 publications

(4 citation statements)

References 28 publications

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“…Additionally, it matches well with similarly shaped and sized wooden structures observed in the study of Hafeez et al, 2019 [35]. This suggests that in addition to repeated measurements, future observation-based values in regular and irregular structures could also be validated against existing measurements in published compilations, like the instrumented buildings in the CESMD (Center for Engineering Strong Motion Data) database, and targeted campaigns, such as described by Hafeez et al [35] in their study of 41 wood-framed structures in Canada.…”

Section: Discussionsupporting

confidence: 82%

Toward Structural Health Monitoring with the MyShake Smartphone Network

Patel,

Günay,

Marcou

et al. 2023

Sensors

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The field of structural health monitoring (SHM) faces a fundamental challenge related to accessibility. While analytical and empirical models and laboratory tests can provide engineers with an estimate of a structure’s expected behavior under various loads, measurements of actual buildings require the installation and maintenance of sensors to collect observations. This is costly in terms of power and resources. MyShake, the free seismology smartphone app, aims to advance SHM by leveraging the presence of accelerometers in all smartphones and the wide usage of smartphones globally. MyShake records acceleration waveforms during earthquakes. Because phones are most typically located in buildings, a waveform recorded by MyShake contains response information from the structure in which the phone is located. This represents a free, potentially ubiquitous method of conducting critical structural measurements. In this work, we present preliminary findings that demonstrate the efficacy of smartphones for extracting the fundamental frequency of buildings, benchmarked against traditional accelerometers in a shake table test. Additionally, we present seven proof-of-concept examples of data collected by anonymous and privately owned smartphones running the MyShake app in real buildings, and assess the fundamental frequencies we measure. In all cases, the measured fundamental frequency is found to be reasonable and within an expected range in comparison with several commonly used empirical equations. For one irregularly shaped building, three separate measurements made over the course of four months fall within 7% of each other, validating the accuracy of MyShake measurements and illustrating how repeat observations can improve the robustness of the structural health catalog we aim to build.

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Section: Discussionsupporting

confidence: 82%

Toward Structural Health Monitoring with the MyShake Smartphone Network

Patel,

Günay,

Marcou

et al. 2023

Sensors

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“…The results showed high similarity between the dynamic properties of these two buildings [7]. Hafeez et al studied dynamic properties of 32 light wood frame buildings and concluded that it was inaccurate to take the height of structures as the sole variable in determining the fundamental period of timber structures [8]. Recently, more mass timber buildings in Canada [3][4][5] and Europe [9] have been tested under dynamic loads at the serviceability level.…”

Section: Introduction 567mentioning

confidence: 99%

System Identification of Tall Mass Timber Structures Employing Ambient Vibration Test and Fe Modelling

Mohammadyzadeh

Zhou

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

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Despite the recent rapid development in dynamic characteristics identification of structures, lack of knowledge in dynamic properties of tall mass timber buildings is still an open issue for researchers and designers. There are ongoing international efforts to develop a comprehensive database for predicting the vibration performance of timber structures for serviceability and seismic design. This paper discusses an ambient vibration test (AVT) that was conducted on a six-storey mass timber building known as Wood Innovation and Design Centre (WIDC) located in Prince George, Canada. The test results including the experimental natural frequencies and damping ratios were compared with a threephase test program undertaken in 2014, 2015, and 2017 by FPInnovations. In addition, a numerical modal analysis was conducted on the same building, using both simplified and complex finite element (FE) models. A sensitivity analysis was carried out considering various assumptions of connection types to investigate its effect on the natural frequencies of the structure. The results of current AVT showed minor changes in frequencies over the service time in comparison to previous tests. According to the numerical results, the simplified FE model poorly matched with the results from AVT, while the complex model showed a better agreement with the measured fundamental frequency; however, significant discrepancies were observed in the second and third modes. The sensitivity analysis indicated low impact of different connection type assumptions on the natural frequencies of the case building obtained from the FE models.

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“…The research results showed that the anisotropy of wood properties negatively affects the stress-strain state of structures, which emphasizes the need to take this factor into account in design calculations and scientific research. In addition, it was found that the use of reinforcing stiffeners is an effective design solution for increasing the local stability [22] of compressed plywood slab sheathing and also helps to reduce the material intensity of plywood slab sheathing [23].…”

Section: Introductionmentioning

confidence: 99%

Engineering calculations and numerical modeling of composite adhesive plywood panels

Аnanyev,

Lisyatnikov,

Lukina

et al. 2023

E3S Web Conf.

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The global construction industry is witnessing a surge in production volumes, particularly in residential construction. To address the growing demand for prefabricated and cost-effective housing, the proposition is to employ glued plywood panels as construction components for building floors and roofs. These panels, comprising a timber frame, plywood skins, and insulation, offer numerous advantages, including low weight and a high strength-to-weight ratio. The objective of this study was to diminish the material consumption of panels by comparing calculations using both the traditional engineering method and the finite element method within a software package. The methodology for calculating and designing glued plywood panels, when employing the engineering method, involves determining the geometric characteristics of the panel sections, accounting for variations in the elastic moduli of wood and plywood. In the numerical calculation, the design method of plate elements of the "ReGridQuad" type was chosen, with the assignment of the required plate thickness. The outcomes of all calculations revealed comparable stress and deflection patterns in structures. The values obtained from both calculations were found to be below the standard ones. Research in this domain underscores the significance of numerical calculation methods in enhancing the quality of glued plywood panels, rendering them more competitive in the building materials market.

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Dynamic characteristics of light-frame wood buildings

Cited by 13 publications

References 28 publications

Toward Structural Health Monitoring with the MyShake Smartphone Network

Toward Structural Health Monitoring with the MyShake Smartphone Network

System Identification of Tall Mass Timber Structures Employing Ambient Vibration Test and Fe Modelling

Engineering calculations and numerical modeling of composite adhesive plywood panels

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