Frequency independent damped outrigger systems for multi‐mode seismic control of super tall buildings with frequency independent negative stiffness enhancement

Wang, Meng; Sun, Fei‐Fei; Koetaka, Yuji; Chen, Lin; Nagarajaiah, Satish; Du, Xiuli

doi:10.1002/eqe.3891

Cited by 33 publications

(2 citation statements)

References 62 publications

(158 reference statements)

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“…Meanwhile, regardless of the type of TMD, its essence is to rely on large mass blocks to achieve tuning, which will inevitably increase the cost significantly and occupy limited space resources. Utilizing the quality of each component of the existing building to achieve the goal of shock absorption control is also a topic with broad research significance [19][20][21][22]. Therefore, the author designed a new wall-mounted shock absorber, TMD [23].…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of soft soil foundation with a new type of assembled wall tuned mass damper

Jiang,

Yin,

Yin

et al. 2024

PLoS ONE

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The design of tuned mass damper (TMD) parameters is influenced by the soil-structure-TMD coupling system; thus, it is important to consider the soil-structure interaction (SSI) for the vibration control effect of the TMD. Recently, the acquisition of TMD parameters considering soil-structure interactions has only remained at the theoretical stage, lacking relevant experimental verification. Traditional TMD face the problems of occupying a large building space, increasing construction costs, and non-replaceable components. In this study, an assembled wall-type damping TMD was designed. By comparing the dynamic response of the uncontrolled and controlled structures equipped with the newly assembled wall-type damping TMD in the shaking table test on a soft soil foundation, we analyzed whether the SSI effect was considered in the TMD design parameters on the damping effect of the newly assembled wall-type tuned mass damper. The TMD parameters optimized using the artificial intelligence algorithm were verified experimentally. The results indicated that the traditional TMD design parameters were discordant because the SSI effect was not considered. The SSI effect in the soil effectively reduces the dynamic response of the superstructure. By considering the SSI effect and improving the multi-population genetic algorithm, a wall-type damping TMD with optimized parameters can achieve a good damping effect.

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Section: Introductionmentioning

confidence: 99%

Seismic performance of soft soil foundation with a new type of assembled wall tuned mass damper

Jiang,

Yin,

Yin

et al. 2024

PLoS ONE

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“…Among these, the TMD stands out as a popular SDOF dynamic vibration absorber [20][21][22][23]. In the case of a TMD with constant mass, its control effectiveness relies on both its frequency and damping ratio [24][25][26][27][28]. Therefore, meticulous optimization of TMD parameters is essential to achieve satisfactory performance [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Human-Induced Vibration Control of Floor Structures Using MTMD System Optimized by MATLAB-SAP2000 Interface

Zhang,

Shi,

Wang

2024

Buildings

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Under human-induced excitations, a floor structure may suffer excessive vibrations due to its large span and low damping ratio. Vertical vibrations, in particular, can become intolerable during resonance events. A tuned mass damper (TMD) is a widely used single-degree-of-freedom dynamic vibration absorber. To enhance the serviceability of a floor structure, a multiple TMD (MTMD) system finds broad application. The parameters of the MTMD must be carefully designed to achieve satisfactory performance. However, existing studies often employ a simplified model of the floor structure with closely spaced modes to optimize the parameters of MTMD. Nonetheless, an oversimplified floor model can lead to a reduction in its control effect. To solve this problem, this study utilizes the OAPI facility of SAP2000 to build a connection with MATLAB. A multi-objective optimization algorithm based on the artificial fish swarm algorithm (AFSA) for MTMD is developed in MATLAB, while the finite element model of a real floor structure is built in SAP2000. The locations of the MTMD system are initially specified in SAP2000 and, through the proposed MATLAB–SAP2000 interface, data can be exchanged between them. Based on the structural dynamic responses to external excitations in SAP2000, the optimization process for the MTMD is carried out in MATLAB. Concurrently, the parameters of the MTMD in SAP2000 are iteratively adjusted until they reach their final optimal values. To underscore the enhancements brought about by the proposed interface and optimization method, a comparative case study is conducted. A group of MTMDs, optimized using a conventional method, is presented for reference. The numerical results indicate that, overall, the proposed MTMD system exhibits superior control effectiveness and robustness.

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Application of amplified damped outrigger in seismic design of high‐rise buildings

Xue,

Zhao,

et al. 2024

Structural Design Tall Build

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SummaryThe application of the outrigger technology effectively improves the lateral stiffness of buildings, reduces harmful deformation, enhances the seismic resistance of structures, and contributes to the rapid development of high‐rise buildings. To improve the response speed and energy dissipation of a viscous damping outrigger under seismic excitation, a viscous damping outrigger with an amplifier was proposed, and its effectiveness was verified by combining it with the seismic design of a 149.2 m high‐rise building in an 8.5‐degree intensity area. To determine the additional damping ratio of the building structure, investigations were carried out using both the code method and energy ratio method to evaluate the contribution of the damping outrigger. The damped outrigger equivalent stiffness determination method was studied, and the simplified engineering calculation method was compared against the refined finite element analysis results for engineering design purposes. The displacement amplification technique incorporated into the viscously damped outrigger can enhance the damper response speed, and increase the energy dissipation of the damped outrigger system. The application of an enlarged damped outrigger in engineering can result in an additional damping ratio of approximately 1% while simplifying the calculation method based on the additional damping and equivalent damper cut‐line stiffness, which can be useful in engineering design.

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Frequency independent damped outrigger systems for multi‐mode seismic control of super tall buildings with frequency independent negative stiffness enhancement

Cited by 33 publications

References 62 publications

Seismic performance of soft soil foundation with a new type of assembled wall tuned mass damper

Seismic performance of soft soil foundation with a new type of assembled wall tuned mass damper

Human-Induced Vibration Control of Floor Structures Using MTMD System Optimized by MATLAB-SAP2000 Interface

Application of amplified damped outrigger in seismic design of high‐rise buildings

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