Ambient vibration tests of a cross-laminated timber building

Reynolds, Thomas; Harris, Richard; Chang, Wen‐Shao; Bregulla, Julie; Bawcombe, Jonathan

doi:10.1680/coma.14.00047

Cited by 29 publications

(21 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The exception observed in the longitudinal direction of building B5 is due to the fact that this building has concrete suspended slabs (added mass) up to the second level and concrete retaining walls at ground level. Similar observations have been made in the literature by Reynolds et al (2014), where an increase was observed in the fundamental period due to predominant increase in mass over the increase in stiffness. The increase in stiffness for finished buildings is significant because it is common practice for structural engineers to neglect the stiffness effect of non-structural components such as partition walls, external walls, parapet walls, stair walls, elevator shaft, etc but take their mass into account.…”

Section: Observation On Measured Periods and Comparison To Literaturesupporting

confidence: 91%

Dynamic characteristics of light-frame wood buildings

2019

View full text Add to dashboard Cite

This research project deals with dynamic field testing of light-frame wood buildings with wood based shear walls. The primary objective of the investigation is to evaluate the code formula for estimating light wood frame building's fundamental period, through intensive field testing and numerical modelling. The project also aims to propose an alternative simplified rational approach where applicable. The thesis provides insight to the ambient vibration testing procedures of light-frame wood buildings and explains the protocol adopted for the current research program. Experimental and numerical investigations were performed to evaluate the effect of non-structural components, and the connectivity between firewall-separated buildings, on dynamic properties of light-frame wood buildings. The study provides a reliable expression for building period estimate based on field testing and numerical modeling.iii

show abstract

Section: Observation On Measured Periods and Comparison To Literaturesupporting

confidence: 91%

Dynamic characteristics of light-frame wood buildings

2019

View full text Add to dashboard Cite

show abstract

“…They tested the building under both ambient vibration and using a rotational shaker. Ambient vibration tests have also been carried out on a seven-storey CLT building (Reynolds et al, 2015). Aside from these studies, however, the majority of research into the dynamic response of such structures has been under the irreversible deformations associated with seismic loading.…”

Section: Introductionmentioning

confidence: 99%

Comparison of multi-storey cross-laminated timber and timber frame buildings by in situ modal analysis

Reynolds

Casagrande

Tomasi

2016

Construction and Building Materials

Self Cite

View full text Add to dashboard Cite

The dynamic properties of two common structural systems for multi-storey timber buildings are compared through in-situ testing of completed buildings. The two five-storey buildings examined are identical except for their structural system, which in one is sheathed stud-and-rail timber construction, and in the other a cross-laminated timber panel system. Both also have a reinforced-concrete core located at the centre of one edge of the rectangular plan of each building. An output-only modal analysis method was used to identify the modal properties of the buildings: the random decrement technique was applied to the stochastic measured response, and then the time-domain random decrement signature was used for modal analysis by the Ibrahim Time Domain method. The natural frequencies, damping ratios and mode shapes of the first three vibration modes of the buildings were identified, and compared with those modeled based on the properties of the core and timber walls. The variations in properties between the two buildings are discussed. The two structures show very similar natural frequencies and damping ratios, suggesting that they could perhaps be considered as the same class of building in design for lateral movement.

show abstract

“…The building, known as "Albina Yard, " is an example of a hybrid structure, exhibiting a mass timber gravity system, while its lateral force resisting system consists of light-frame shear walls. While extensive research has gone into characterizing the structural properties of mass timber members and subsystems, few research studies have analyzed the dynamic behavior of buildings encompassing mass timber structural products, and specifically CLT (Reynolds et al, 2014(Reynolds et al, , 2015(Reynolds et al, , 2016Hu et al, 2016). The limited number of currently built mass timber buildings, especially in North America, makes this endeavor more challenging, while it provides motivation for characterizing the as-built modal properties of this type of structures.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characterization and Vibration Analysis of a Four-Story Mass Timber Building

Mugabo

Barbosa

Riggio

2019

Front. Built Environ.

View full text Add to dashboard Cite

Mass timber construction has been gaining momentum in multi-story residential and commercial construction sectors in North America. As taller mass timber buildings are being planned and constructed, in-situ dynamic tests of this type of construction can be performed to further validate their design and use. As part of this larger effort, an in-situ dynamic characterization testing campaign based on ambient vibration measurements was conducted on a recently constructed four-story mass timber building located in Portland, Oregon. The building features cross-laminated timber (CLT) floors, a glued laminated timber (GLT) framing gravity system, and light-frame shear walls and steel HSS hold-downs that compose the lateral resisting system of the building. Ambient vibration acceleration testing data were collected using 18 accelerometers that were wired to a portable data acquisition system in two experimental setups. Approximately 2 h of bi-directional horizontal acceleration data were recorded. In this paper, two operational modal analysis methods are used for estimating the modal parameters (frequency, damping, and mode shapes) based on the data collected. In addition, a multi-stage linear Finite Element (FE) model updating procedure is presented for this building type and the FE estimates of frequencies and mode shapes are compared to estimates from the collected data. The calibrated FE model provides confidence to the operational modal results and presents a comprehensive modal characterization of the building. At ambient levels of excitation, the developed FE model suggests that stiffness of the non-structural elements, such as the exterior wall cladding, and glazing affects the modal response of the building considerably. Lessons learnt on this unique and first of a kind four-story structure constructed in the United States and implications for taller mass timber buildings are summarized and provide valuable insight for the design and assessment for this building type under future dynamic excitation events.

show abstract

Ambient vibration tests of a cross-laminated timber building

Cited by 29 publications

References 19 publications

Dynamic characteristics of light-frame wood buildings

Dynamic characteristics of light-frame wood buildings

Comparison of multi-storey cross-laminated timber and timber frame buildings by in situ modal analysis

Dynamic Characterization and Vibration Analysis of a Four-Story Mass Timber Building

Contact Info

Product

Resources

About