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

Lyu, Qing; Liu, Wensheng; Wang, Wei Qiang; Chen, Yue

doi:10.1002/tal.1728

Cited by 9 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The simulation was then carried out for the El Centro 1940 NS ground excitation. Similar mechanisms and optimum design of shared tuned mass dampers were also discussed in [13], where an isolated corridor was used as the damper. The buildings are then subject to El Centro ground excitation similar to Palacios et al [12].…”

Section: Introductionmentioning

confidence: 90%

Shared vibration absorbers for connected SDOF structures

Arfiadi

Frans

2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

This paper considers the response reduction of structures connected with shared vibration absorbers. The response of two single-degree-of-freedom (SDOF) structures next to each other are minimized by a connected mass damper as an absorber. The optimum values of the damper’s properties are obtained by using metaheuristic algorithms. The objective function is taken as the H2 norm of the regulated outputs, where the regulated outputs are taken as displacements of both structures. To simplify the problems, the stiffness and damping properties of the absorber are taken the same. Genetic algorithms are used to optimize the absorber parameters. Two cases are considered in the numerical examples. The first case is when we have twin buildings, in which each structure’s mass, stiffness, and damping are the same. The second case is when the structure stiffnesses are different, one is the stiff structure, and another is the flexible one. Several dampers’ constraints are considered to see the possibilities of the connected absorber to reduce the structural responses. The simulations of the structures subjected to four selected ground excitations were carried out to show the absorbers’ performance in reducing the structures’ response with different percentages of reductions.

show abstract

Section: Introductionmentioning

confidence: 90%

Shared vibration absorbers for connected SDOF structures

Arfiadi

Frans

2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…A 10‐story building from Lyu et al 52 is used as a case study in this paper. The mass and stiffness of each story are 1.02 × 10 6 kg and 1.5 × 10 9 N/m, respectively.…”

Section: Earthquake Protection Smart Structurementioning

confidence: 99%

Seismic control of a smart structure with semiactive tuned mass damper and adaptive stiffness property

Wang

Zhou

Shi

2023

Earthquake Engineering and Resilience

View full text Add to dashboard Cite

To reduce structural responses under earthquake excitations effectively and improve their resilience, a smart structure with a semiactive tuned mass damper (STMD) on the top story and a semiactive adjustable stiffness device (SASD) on the first story which contributes to the structural adaptive stiffness property is developed in this study. The SASD consists of a diamond spring device composed of four linear springs and an electromagnetic actuator, which can change the angle of the diamond device and therefore retune the stiffness. Two typical STMDs developed previously are reviewed first, which are diamond device‐based STMD with variable stiffness and damping and pendulum‐type STMD with variable frequency and eddy current damping, respectively. Numerical results show that the proposed STMD has a better control performance than passive‐tuned mass damper and STMD with variable stiffness or damping acting independently. To enhance the seismic protection of the structure with an STMD on the top story further, based on the principle of base isolation, a diamond device‐based SASD is applied to the first story. The linear quadratic Gaussian‐based variable stiffness algorithm for SASD is proposed. A 10‐story building is presented as a case study. The variable stiffness range of SASD is discussed in detail, while it is found that a ±50% variable stiffness range achieves the best earthquake mitigation. Control effects of different numbers of SASD implemented along the height of the building are compared as well. Numerical results show that with the increase in the number of SASDs, the earthquake mitigation effect is better; however, the magnitude of the increase is decreasing. The smart structure with the combined SASD and STMD has an excellent seismic protection performance and is better than with SASD or STMD acting independently. Meanwhile, it is found that the proposed combination has a similar control effect to four SASDs installed from the first story to the fourth story, respectively, while it can reduce the number of additional electromechanical systems and the influence on the use function of the building.

show abstract