Seismic Energy Assessment of Buildings with Tuned Vibration Absorbers

Elias, Said

doi:10.1155/2018/2051687

Cited by 32 publications

(24 citation statements)

References 38 publications

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“…Later, Elias et al showed the application of the d‐MTMDs in mitigation of the wind and earthquake responses of a tall reinforced concrete chimney. Elias et al, Gill et al, and Elias reported that the performance of the d‐MTMDs is significant in seismic response reduction of the benchmark building, and they showed robust dynamic response reduction achieved thereby. The detailed literature survey on passive TMDs is provided by Elias and Matsagar …”

Section: Introductionmentioning

confidence: 99%

Seismic response control of base‐isolated buildings using multiple tuned mass dampers

Stanikzai

Elias

Matsagar

et al. 2018

Structural Design Tall Build

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Summary Seismic response of a base‐isolated building equipped with single tuned mass damper (STMD), multiple tuned mass dampers (MTMDs), and distributed multiple tuned mass dampers (d‐MTMDs) under real earthquake ground motions is investigated. Numerical study is carried out using analytical models of five‐, 10‐, and 15‐storey base‐isolated buildings equipped with the STMD, MTMDs, and d‐MTMDs. The buildings are modeled as shear‐type structure with a lateral degree of freedom at each floor level, and the buildings are isolated using the laminated rubber bearing, lead‐core rubber bearing, friction pendulum system, and resilient‐friction base isolator. The coupled differential equation of motion for the buildings are derived and solved in the incremental form using Newmark's step‐by‐step method of integration. From the numerical study conducted, it is concluded that installing a tuned mass damper at each floor level of a base‐isolated building reduces the structural response in terms of top floor acceleration and bearing displacement. It is found that installing the MTMDs and d‐MTMDs are significantly beneficial in reducing top floor acceleration as compared with the STMD. Further, almost comparable reduction in the bearing displacement could be obtained by installing the STMD, MTMDs at top, and d‐MTMDs in the base‐isolated buildings. The d‐MTMDs are more beneficial as compared with the STMD and MTMDs as otherwise huge controller mass can now be divided and distributed on different floor levels.

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Section: Introductionmentioning

confidence: 99%

Seismic response control of base‐isolated buildings using multiple tuned mass dampers

Stanikzai

Elias

Matsagar

et al. 2018

Structural Design Tall Build

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“…Using equation (1) and the time scale of approximately 1 : 133, the pressure coefficients measured over 27 sec were converted into an hour-long wind force data. ese wind force data (alongwind and across-wind directions) can be altered to signify larger or smaller wind velocities by multiplying the given time histories by (U/V i ) 2 , where U is the desired mean wind velocity at the i th story of the benchmark structure. As recommended by Yang et al [35], for the performance evaluation of the control systems, only the first 15 mins in 900 s of across-wind data is enough for the computation of building response.…”

Section: Numerical Studymentioning

confidence: 99%

“…Optimally designed TMDs (tuning frequency optimized) have been found to be more effective than conventional ones, where the TMDs are tuned exactly to the frequency of the main structure. Multiple TMDs (MTMDs) are more effective when they are distributed along the height of the structure (d-MTMDs); their optimal placement depends on modal properties of the uncontrolled and controlled structures [2][3][4][5][6][7][8][9]. Advanced TMD schemes such as particle TMDs and TMDs with inerter are more effective than the optimal TMDs [10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Benchmark Building Installed with Tuned Mass Dampers under Wind and Earthquake Loads

Elias

Rupakhety

Ólafsson

2019

Shock and Vibration

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This study presents analysis of a benchmark building installed with tuned mass dampers (TMDs) while subjected to wind and earthquake loads. Different TMD schemes are applied to reduce dynamic responses of the building under wind and earthquakes. The coupled equations of motion are formulated and solved using numerical methods. The uncontrolled building (NC) and the controlled building are subjected to a set of 100 earthquake ground motions and wind forces. The effectiveness of using different multiple TMD (MTMD) schemes as opposed to single TMD (STMD) is presented. Optimal TMD parameters and their location are investigated. For a tall structure like the one studied here, TMDs are found to be more effective in controlling acceleration response than displacement, when subjected to wind forces. It is observed that MTMDs with equal stiffness in each of the TMDs (usually considered for wind response control), when optimized for a given structure, are effective in controlling acceleration response under both wind and earthquake forces. However, if the device is designed with equal mass in every floor, it is less effective in controlling wind-induced floor acceleration. Therefore, when it comes to multihazard response control, distributed TMDs with equal stiffnesses should be preferred over those with equal masses.

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“…Lu et al [2] reported that the particle TVAs are more effective than the optimal TVAs. The researchers presented the multi-mode response control of tall structure by different TVA schemes [3][4][5][6][7][8][9][10]. They concluded that the distribution of the multiple TVAs (d-MTVAs) as per modal properties of the structures caused maximum responses reduction.…”

Section: Introductionmentioning

confidence: 99%

Tuned Vibration Absorbers for Control of Tall Buildings Under Wind and Earthquake Loads

Elias¹,

Rupakhety²,

Ólafsson³

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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This study presents an application of tuned vibration absorbers (TVAs) to reduce dynamic response of tall buildings under multiple excitations such as wind and earthquake ground motion. A finite element model of a typical tall building is prepared with rotational degrees of freedom reduced by static condensation. Mechanical models of TVAs are incorporated in the model. The coupled equations of motion are formulated and solved using numerical methods. The uncontrolled building (NC) and the controlled building are subjected to a number of near fault earthquake ground motions and wind forces (mass excitations). The effectiveness of using multiple TVAs as opposed to a single TVA (STVA) is investigated. The design parameters affecting the effectiveness of the TVA arrangements are chosen to investigate optimal setups. It is observed that STVA are more effective for wind response mitigation than seismic response mitigation of tall buildings. Multiple TVAs are, however, found to be effective for controlling both wind and earthquake induced vibrations. It is concluded that optimally designed TVAs are effective in controlling vibration of buildings subjected to action of wind and earthquake loads.

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Seismic Energy Assessment of Buildings with Tuned Vibration Absorbers

Cited by 32 publications

References 38 publications

Seismic response control of base‐isolated buildings using multiple tuned mass dampers

Seismic response control of base‐isolated buildings using multiple tuned mass dampers

Analysis of a Benchmark Building Installed with Tuned Mass Dampers under Wind and Earthquake Loads

Tuned Vibration Absorbers for Control of Tall Buildings Under Wind and Earthquake Loads

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