Seismic effectiveness of tuned mass dampers considering soil-structure interaction

Wu, Jian‐Fang; Chen, Genda; Liu, Min

doi:10.1002/(sici)1096-9845(199911)28:11<1219::aid-eqe861>3.0.co;2-g

Cited by 54 publications

(19 citation statements)

References 6 publications

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“…However, the design of TMDs is generally carried out based on the rigid‐base assumption—see, for example, Salvi and Rizzi 3 presented a tuning procedure based on the minimax algorithm for tuning the free TMD parameters for seismic applications. It is well recognized that dynamics characteristics—for example, fundamental frequencies, shape modes, and damping ratios—are altered due to soil–structure interaction (SSI) effects, especially on soft soil 4,5 . Therefore, it is imperative to investigate SSI effects on the effectiveness of TMD devices for multistory structures.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of particle tuned mass damper devices for pile‐supported multi‐story frames under seismic excitations

Liu

et al. 2020

Struct Control Health Monit

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Particle tuned mass dampers (PTMDs) have attracted recent attention for reducing seismic demands on large structures. Yet, research on the control performance of PTMDs for soil-structure interaction (SSI) systems under earthquake excitations is non-existent. This paper presents a comprehensive investigation on the effectiveness of PTMD devices for pile-supported multistory frames through shaking table tests and simulations with validated numerical models. Particle damping effectiveness is analyzed through comparisons with systems lacking external damping. The test results show that the mitigation effects of PTMDs on the maximum structural accelerations and displacements decrease when SSI effects are present and that particle damping improves control performance of conventional TMDs. Detailed finite element models of the tested specimens are also constructed-including SSI effects-and validated initially against the test data. In these models, the soil nonlinearities are considered using a bounding surface plasticity model, and the PTMD devices are simplified to an equivalent single-particle damper using an analytical model. The validated numerical models can be used in further parametric studies involving optimal PTMD design and deployment within a performance-based seismic engineering framework.

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Section: Introductionmentioning

confidence: 99%

Effectiveness of particle tuned mass damper devices for pile‐supported multi‐story frames under seismic excitations

Liu

et al. 2020

Struct Control Health Monit

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“…The performance and effectiveness of a TMD device are reduced as the period of the TMD deviates away from the natural period of the structure. Wu et al concluded that when soil is very soft, TMD cannot effectively reduce the seismic response of the soil‐structure system. On the other hand, when soil is moderately stiff, TMD should be tuned to the natural period of the soil‐structure system instead of the fixed‐based structure, in order to optimize the seismic performance of TMD.…”

Section: Introductionmentioning

confidence: 99%

Influence of soil‐structure interaction on performance of a super tall building using a new eddy‐current tuned mass damper

Zhou

Wei

Lü

et al. 2018

Structural Design Tall Build

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Tuned mass dampers (TMDs) can be used as vibration control devices to improve the vibration performance of high-rise buildings. The Shanghai Tower (SHT) is a 632-m high landmark building in China, featuring a new eddy-current TMD. Special protective mechanisms have been adopted to prevent excessively large amplitude of the TMD under extreme wind or earthquake loading scenarios. This paper presents a methodology for simulating behavior of the new eddy-current TMD that features displacementdependent damping behavior. The TMD model was built into the SHT finite element model to perform frequency analysis and detailed response analyses under wind and earthquake loads. Furthermore, soil-structure interaction (SSI) effects on wind and seismic load responses of the SHT model were investigated, as SSI has a significant impact on the vibration performance of high-rise buildings. It was found that SSI has more significant effects on acceleration response for wind loads with a short return period than for wind loads with a long return period. Some of the acceleration responses with SSI effects exceed design limits of human comfort for wind loads with shorter return periods. As to the seismic analyses, it was found that SSI slightly reduces the displacement amplitude, the damping force, and the impact force of the TMD.

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“…Gao et al (1996) analyze the TMD behavior when facing seismic excitations and conclude that they are as efficient in the control of a soil-structure system as in the fixed base structures, as long as the soil-structure fundamental frequency is accurately estimated for the damper tuning. Wu et al (1999) studied how the SSI affects the TMD seismic behavior when they are installed in flexible base structures. In this study, a structure is subjected to a stationary random excitation and the root mean square of the controlled response was compared to an uncontrolled system to measure the TMD performance.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Seismic Excitation Frequencies Content on the Behavior of a Tuned Mass Damper in Low-Rise Building Considering Soil-Structure Interaction

Espinoza

Benedetti

Alvarez-Mendoza

et al. 2018

Lat. Am. j. solids struct.

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The influence of the frecuency content of seismic excitations on the behavior of an optimal tuned mass damper (TMD) is studied in the context of a system with explicit consideration of soil-structure interaction. A stochastic analysis is made in the time domain for two random processes, one considering a broad bandwidth process (BBP) and other considering a narrow bandwidth process (NBP). A structure built over three different types of soil (soft, medium and hard) is considered. For the optimization of the TMD, the minimization of the ratio between the standard deviation of the displacement of the main structure with TMD with respect to a structure without TMD, is used as the target function. It is found that for seismic excitations with high frecuency content, the ratio of the TMD frequencies compared to the fixed base frequency of the structure approaches to 1 as the soil becomes more rigid. It is also observed that the TMD become tuned with the flexible base frequency for all soil types, producing perfect tuning for small mass ratios and detuning gradually for higher mass ratios. On the other hand, the TMD optimal damping ratio increases as the TMD mass ratio is higher, independently of the soil type. The TMD is more efficient for higher values of the TMD mass ratios, especially on soft soil. In structures built over flexible base, that are subjected to low frequency content excitations, the optimal TMD is tuned with the flexible base, independently of the type of soil and the fixed base period of the main structure. The TMD optimal damping is not sensitive to the flexible period for small mass ratios, and reaches its minimum value when it matches with the predominant period of the seismic event. On the other hand, the TMD reaches its maximum efficiency when it is tuned with the flexible period of the soil-structure system, and coincides with the predominant period of the seismic exitation and is higher on soft soil. A deterministic analysis is made using two seismic records, an artificial earthquake compatible with the Chilean code NCh2745 characterized by high frequencies content and other similar to the event in 1985 in Mexico, characterized by low frequencies content. It is seen that the optimal TMD is efficient controlling the response of the structure in all types of soil analyzed.

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Seismic effectiveness of tuned mass dampers considering soil-structure interaction

Cited by 54 publications

References 6 publications

Effectiveness of particle tuned mass damper devices for pile‐supported multi‐story frames under seismic excitations

Effectiveness of particle tuned mass damper devices for pile‐supported multi‐story frames under seismic excitations

Influence of soil‐structure interaction on performance of a super tall building using a new eddy‐current tuned mass damper

Influence of the Seismic Excitation Frequencies Content on the Behavior of a Tuned Mass Damper in Low-Rise Building Considering Soil-Structure Interaction

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