Modeling stiffness of connections and non-structural elements for dynamic response of taller glulam timber frame buildings

Tulebekova, Saule; Malo, Kjell Arne; Rönnquist, Anders; Nåvik, Petter

doi:10.1016/j.engstruct.2022.114209

Cited by 30 publications

(25 citation statements)

References 17 publications

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“…For example, a study regarding a CLT building on a piled foundation slab showed that the foundation had little influence on the dynamic response of the building [9]. A study evaluating the dynamic response of the Eiffel tower used Winkler springs for the soil-structure interaction model [20], while rigid foundations were used for a high-rise timber building in a model update procedure [13]. There are examples of the influence of soil in a dynamic test of walls [43], suggesting that soil-structure integration models are to be used.…”

Section: 4mentioning

confidence: 99%

“…Soil-structure interaction is a further factor of influence in the FE analysis. Previous AVT studies with model updating set the soil-structure connection in their models to fixed [13], [14] used Winkler springs for mat foundations [20] or springs for piled foundations [9].…”

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confidence: 99%

“…However, in most studies in this field, AVT is used due to its simplicity and the fact that it does not require an artificial excitation source. These studies include the evaluation of 41 lightframe timber buildings in Canada [10], two fivestory timber buildings in Italy [11], an eight-story CLT building [12] in Norway, an 18-story glulam timber frame building in Norway [13], and a fourstory CLT building in the USA [14].…”

mentioning

confidence: 99%

“…Previous studies conclude that code values for additional long-term slab load (furniture etc.) are too high and suggest that a realistic range is 16-33 kg/m 2 [9] [13].…”

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confidence: 99%

“…The static system, in particular the connections between structural members, is another factor that should be considered in order to model stiffness correctly in a dynamic analysis. Several studies suggest that connectors should be handled separately with reduction zones in the edges of the elements [9], [13], while another study [12] concluded that these connectors had only a minor influence on the dynamic response. It is also widely recognized that non-structural elements influence the modal response of a building [21].…”

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confidence: 99%

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Dynamic Evaluation of a Nine-Story Timber-Concrete Hybrid Building during construction

Larsson

Abdeljaber

Dorn

2023

Preprint

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Timber-concrete hybrid buildings are an innovative solution to increase the amount of timber materials used in modern buildings. This study presents a dynamic evaluation of a nine-story timber-concrete hybrid residential building during construction. The building consists of a seven-story structure in cross-laminated timber (CLT) on top of two stories in concrete. Ambient vibration tests were conducted seven times during the 13-month construction period, including tests with only the structural elements in place and tests of the finished building with the façade, non-structural walls, and other internal finishing. The results show a clear decrease in the natural frequencies of the building as the building gets higher and more elements are installed. However, a slight increase in the natural frequency was observed following the installation of the non-structural walls in the final construction stage. A corresponding finite element analysis is presented for each test, providing additional insights into the parameters typically used in the structural design process. The study demonstrates the importance of properly selecting reduction factors for CLT elements in a dynamic finite element analysis. It also shows the importance of considering non-structural walls, both regarding weight and stiffness, even in buildings where the number of non-structural walls is relatively small compared to structural walls.

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Section: 4mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

“…Previous studies conclude that code values for additional long-term slab load (furniture etc.) are too high and suggest that a realistic range is 16-33 kg/m 2 [9] [13].…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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Dynamic Evaluation of a Nine-Story Timber-Concrete Hybrid Building during construction

Larsson

Abdeljaber

Dorn

2023

Preprint

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Evaluation of vibration properties of an 18-story mass timber–concrete hybrid building by on-site vibration tests

Miyazu,

Loss

2024

J Civil Struct Health Monit

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Timber–concrete hybrid structural systems are a practical option to provide tall mass timber buildings with a lateral load-resisting system. This paper discusses the dynamic behavior of an 18-story timber–concrete hybrid building based on the vibration properties evaluated by on-site vibration tests. First, microtremor measurements and human-powered excitation tests were carried out and the obtained vibration data were analyzed using a stochastic subspace identification method to derive natural frequencies, damping ratios, and mode shapes. Then, a finite-element (FE) model was developed based on detailed structural design information, and its eigenvalues and eigenvectors were compared with the test results. The vibration test results showed various mode shapes, including in-plane deformation of the floor diaphragm composed of cross-laminated timber (CLT) panels. The damping ratios in all the modes were scattered between 1 and 3%, and no frequency dependency was observed. The modal properties of the FE model agreed well with the test results by considering the additional stiffness of non-structural components. In order to simulate the in-plane deformation of the CLT floor diaphragm, detailed modeling of the connection between each CLT floor panel and the connection between CLT floor panels and concrete cores is recommended. The findings provide practitioners with an insight into dynamic properties and FE modeling methods of tall timber–concrete hybrid buildings.

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Effect of lateral resisting systems on the wind-induced serviceability response of tall timber buildings

Ussher,

Aloisio,

Rathy

2023

Case Studies in Construction Materials

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Modeling stiffness of connections and non-structural elements for dynamic response of taller glulam timber frame buildings

Cited by 30 publications

References 17 publications

Dynamic Evaluation of a Nine-Story Timber-Concrete Hybrid Building during construction

Dynamic Evaluation of a Nine-Story Timber-Concrete Hybrid Building during construction

Evaluation of vibration properties of an 18-story mass timber–concrete hybrid building by on-site vibration tests

Effect of lateral resisting systems on the wind-induced serviceability response of tall timber buildings

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