Dynamic characteristics of wind-excited linked twin buildings based on a 3-dimensional analytical model

Song, Jie; Tse, Kam Tim

doi:10.1016/j.engstruct.2014.08.015

Cited by 25 publications

(16 citation statements)

References 27 publications

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“…This is because large value of ρF*in means that the resulting inphase generalized force component is relatively large, whereas the resulting out-of-phase generalized force component is relatively small. It has been confirmed in (Song and Tse, 2014) that link's stiffness only increases the frequency of the out-of-phase mode and thus only decreases the out-of-phase response component. Therefore, if the out-of-phase generalized force component is small (i.e., ρF*in is large), the minor decrease in the out-of-phase modal response component will not lead to significant reduction in the total response.…”

Section: Effect Of Correlation On the Wind-induced Responses Of Lbssupporting

confidence: 50%

“…In this way, the structural coupling due to the link is equal in these five cases and thus the difference between the resulting responses can be attributed only to aerodynamic forces. The structural system for case 2, which is the same as that in Song and Tse (2014). The first three frequencies of the system are 0.239 Hz (x direction), 0.239 Hz (y direction), and 0.297 Hz (θ direction).…”

Section: Effect Of Correlation On the Wind-induced Responses Of Lbsmentioning

confidence: 99%

“…Furthermore, the existence of the structural link can couple the vibrations of the two connected buildings by transferring internal forces. Due to this link-induced structural coupling, wind forces on all the connected buildings should be taken into consideration simultaneously to accurately reflect the true nature of wind-excited LBs and calculate the resulting structural responses (Xie and Irwin, 2001;Lim and Bienkiewicz, 2007;Song and Tse, 2014). This involves summing wind force components of all the connected buildings.…”

Section: Introductionmentioning

confidence: 99%

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Aerodynamic correlation of linked buildings

Song¹,

Tse²,

Tamura³

et al. 2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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This paper investigates the intra-building and inter-building aerodynamic correlations of linked buildings (LBs, i.e., adjacent tall buildings structurally connected by links such as skybridges, skypools and skygardens). Spatiotemporal wind pressure data on a few typical LBs with different gap distances are used to examine the two aerodynamic correlations. The intra-building aerodynamic correlation is examined using correlation coefficients and trajectories between wind force components on the building. Results show that the intrabuilding aerodynamic correlations for the LBs differ considerably from that for the isolated building, especially in the correlation between along-wind and torsional force components. The inter-building aerodynamic correlation is then presented in terms of the correlation coefficients between local wind force components and between generalized force components of the two buildings. The along-wind inter-building correlation is found to decrease with increasing gap distance, whereas the variation of cross-wind inter-building correlation is more complicated. In addition, it is illustrated that the wind-induced response of the LB is related positively to the correlation coefficient between the generalized force components of the two buildings in the associated unlinked case.

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Section: Effect Of Correlation On the Wind-induced Responses Of Lbssupporting

confidence: 50%

Section: Effect Of Correlation On the Wind-induced Responses Of Lbsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Aerodynamic correlation of linked buildings

Song¹,

Tse²,

Tamura³

et al. 2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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“…Lim's group used a generic mode shape expressed by a power function and the associated mode shape correction factors to determine structural responses, but the details on how to determine mode shapes of the LBs were not reported. Previous studies (Tse and Song, 2013a, b, c;Song and Tse, 2014;Tse and Song, 2015) have shown that an LB's mode shapes may differ significantly from those of a standalone building. In some cases, the mode shapes of an LB cannot be fitted by a power function.…”

Section: Introductionmentioning

confidence: 96%

“…For instance, Lim's group investigated the effect of the link-induced structural coupling on frequencies of twin buildings connected by a link, using a simplified six-degree-of-freedom model (Lim, 2009;Lim et al, 2011;Lim and Bienkiewicza, 2014). The effects of the structural coupling on the modal properties and wind-induced responses of LBs have also been examined systematically in a number of previous studies (Tse and Song, 2013a, b, c;Song and Tse, 2014;Tse and Song, 2015). It has been shown that LBs oscillate in one of the two modes in each direction: the in-phase mode (i.e., two towers vibrating along the same direction) and the out-of-phase mode (i.e., two towers vibrating in opposite directions).…”

Section: Introductionmentioning

confidence: 99%

Aerodynamics of closely spaced buildings: With application to linked buildings

Song

Tse

Tamura

et al. 2016

Journal of Wind Engineering and Industrial Aerodynamics

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This paper investigates inter-building and intra-building aerodynamic correlations of linked buildings (LBs, i.e., adjacent tall buildings structurally connected by links such as skybridges, skypools and skygardens). Spatiotemporal wind pressure data on a typical LB setup with different gap distances are used to examine inter-building aerodynamic correlation, which is presented in terms of the correlation coefficients between local wind force components and between generalized force components of the two LBs. The along-wind inter-building correlation coefficient is found to decrease for wind direction α = 0 o and increase for α = 90 o with increasing gap distance, whereas variation of crosswind inter-building correlation is complicated. In addition, it is illustrated that the wind-induced response of the LBs usually relates positively to the correlation coefficient between the generalized force components of the two buildings in the associated unlinked case. Intra-building aerodynamic correlation of the LBs is examined using correlation coefficients and trajectories, and then compared with those of an isolated building. Results show that intra-building aerodynamic correlations differ considerably, especially between along-wind and torsional force components. However, although intra-building aerodynamic correlation is significant, its effect on the wind-induced responses of LBs is found to be relatively small. It may even be overshadowed by the effects of link-induced structural coupling.

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Vertical deformation analysis of a high‐rise building with high‐position connections

Bai

Zhang

2020

Structural Design Tall Build

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Summary In this paper, a high‐rise frame‐core tube structure with strengthened stories and high‐position connections, a new landmark building in Wuhan, whose height is 238.6 m, is selected as an example. Construction simulation analysis is carried out by the finite element analysis software ETABS to study the vertical deformation and deformation difference of vertical members under the gravity load, taking the influence of construction processes and shrinkage and creep of concrete into consideration. The results show that there is a significant difference between the vertical deformation of the twin‐tower model with connections and that of the single‐tower model. Some engineering countermeasures are put forward to reduce the vertical deformation difference of the twin‐tower connected structure.

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Dynamic characteristics of wind-excited linked twin buildings based on a 3-dimensional analytical model

Cited by 25 publications

References 27 publications

Aerodynamic correlation of linked buildings

Aerodynamic correlation of linked buildings

Aerodynamics of closely spaced buildings: With application to linked buildings

Vertical deformation analysis of a high‐rise building with high‐position connections

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