Modal Analysis of a Linked Cantilever Flexible Building System

Tse, K.T.; Song, Jie

doi:10.1061/(asce)st.1943-541x.0001250

Cited by 14 publications

(7 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

See 1 more Smart Citation

Aerodynamics of closely spaced buildings: With application to linked buildings

Song

Tse

Tamura

et al. 2016

Journal of Wind Engineering and Industrial Aerodynamics

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 96%

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…Lee et al revealed that a sky corridor could effectively decrease the dynamic responses of coupled tall buildings by increasing its damping ratio, and significant control effect could be achieved using additional viscous dampers. Tse and Song analyzed the effects of link parameters on the modal properties and the wind‐induced responses of the system by modeling each building as a cantilever beam. The analytical solution and results could be used for quickly evaluating the modal properties of the linked building systems and to optimally design the link during the preliminary design stage.…”

Section: Introductionmentioning

confidence: 99%

Mechanism and optimum design of shared tuned mass damper for twin‐tower structures connected at the top by an isolated corridor

Lyu

Liu

Wang

et al. 2020

Structural Design Tall Build

View full text Add to dashboard Cite

Summary The concept of shared tuned mass damper (STMD) for twin towers linked by a sky corridor using flexible joints is proposed in this paper. The analytical expressions of the transform functions and random earthquake responses of the flexibly connected structures are derived using a three‐degrees‐of‐freedom model system. The seismic reduction mechanism of the STMD is revealed using comparative analysis between the structures with STMD and those connected using a viscoelastic damper. The effect of the nondimensional parameters such as the frequency ratio of the two primary structures, mass ratio, tuning frequency ratio of the corridor, and damping ratio of the passive control devices on the structural seismic response is investigated. Optimum parametric analysis is performed using the principle of minimizing the displacements of both towers, and the optimal parameter formulas are established. Numerical analysis is conducted to verify the control effectiveness of the connected multi‐degree‐of‐freedom system subjected to the El Centro earthquake ground motion. The results show that the earthquake responses of the towers can be effectively reduced if the parameters of the flexible connecting elements are appropriately selected for a certain corridor mass. Moreover, a remarkable seismic reduction effect can be achieved if the towers have similar dynamic properties.

show abstract

“…In the context of modelling, a large number of studies are devoted to the single‐ or multi‐degree‐of‐freedom approach to model elastic structures . The linear elastic shear‐type deformations and flexural‐type deformation (Euler–Bernoulli beam) from partial differential motion equations were also used. All the aforementioned models do not take into account the combination of shear‐type deformation and rotary inertia effects in the dynamic behaviour of buildings.…”

Section: Introductionmentioning

confidence: 99%

Fuzzy magnetorheological device vibration control of the two Timoshenko cantilever beams interconnected under earthquake excitation

Ndemanou

Nbendjo

2018

Structural Design Tall Build

View full text Add to dashboard Cite

Summary This paper deals with the nonstationary random response of the two tall buildings connected via a magnetorheological device. The Timoshenko cantilever beam approach is used to model each of the structures. An analytical procedure for obtaining the modal equations of the whole structural system is detailed. By applying numerically the peak of root‐mean‐square displacement approach, the optimal attachment point of the control device on the structures benefited to the first two vibration modes is determined. Furthermore, a fuzzy controller rule is used to model the failure data by computing the desired voltage leading to a good control at each mode.

show abstract

Modal Analysis of a Linked Cantilever Flexible Building System

Cited by 14 publications

References 24 publications

Aerodynamics of closely spaced buildings: With application to linked buildings

Aerodynamics of closely spaced buildings: With application to linked buildings

Mechanism and optimum design of shared tuned mass damper for twin‐tower structures connected at the top by an isolated corridor

Fuzzy magnetorheological device vibration control of the two Timoshenko cantilever beams interconnected under earthquake excitation

Contact Info

Product

Resources

About