Evaluation of multiple active lever-type tuned mass dampers for structures under ground acceleration

In this paper, parameters of the tuned mass dampers are optimized to improve the performance level of steel structures during earthquakes. In this regard, a six-story steel frame is modeled using a concentrated plasticity method. Then, the optimum parameters of the Tuned Mass Damper (TMD) are determined by minimizing the maximum drift ratio of the stories. The performance level of the structure is also forced to be located in a safety zone. The incremental dynamic analysis is used to analyze the structural behavior under the influence of the artificial, near- and far-field earthquakes. The results of the investigation clearly show that the optimization of the TMD parameters, based on minimizing the drift ratio, reduces the structural displacement, and improves the seismic behavior of the structure based on Federal Emergency Management Agency (FEMA-356). Moreover, the values of base shear have been decreased for all studied records with peak ground acceleration smaller or equal to 0.5 g.

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Design and performance evaluation of inerter-based tuned mass dampers for a ground acceleration excited structure

Soil Dynamics and Earthquake Engineering ◽

10.1016/j.soildyn.2020.106463 ◽

2021 ◽

Vol 140 ◽

pp. 106463

Author(s):

Abdollah Javidialesaadi ◽

Nicholas E. Wierschem

Keyword(s):

Performance Evaluation ◽

Tuned Mass Dampers ◽

Ground Acceleration ◽

And Performance

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Optimal design of tuned mass dampers through differential evolution method for reducing the dynamic response of structures subjected to earthquake loads

ENTRAMADO ◽

10.18041/1900-3803/entramado.2.7081 ◽

2021 ◽

Vol 17 (2) ◽

pp. 244-254

Author(s):

Daniel Alejandro Caicedo-Díaz ◽

Luis Augusto Lara-Valencia ◽

Yamile Valencia-González

Keyword(s):

Optimal Design ◽

Dynamic Response ◽

Differential Evolution ◽

Selection Process ◽

Design Parameters ◽

Tuned Mass Dampers ◽

Ground Acceleration ◽

Peak Displacement ◽

Earthquake Loads

This paper introduces a methodology for the optimal design of passive Tuned Mass Dampers (TMDs) to control the dynamic response of buildings subjected to earthquake loads. The selection process of the optimal design parameters is carried out through a metaheuristic approach based on differential evolution (DE) which is a fast, efficient, and precise technique that does not require high computational efforts. The algorithm is aimed to reduce the maximum horizontal peak displacement of the structure and the root mean square (RMS) response of displacements as well. Furthermore, four more objective functions derived from multiple weighted linear combinations of the two previously mentioned parameters are also studied to obtain the most efficient TMD design configuration. A parallel process based on an exhaustive search (ES) with precision to 2 decimal positions is used to validate the optimization methodology based on DE. The proposed methodology is then applied to a 32-story case-study derived from an actual building structure and subjected to different ground acceleration registers. The best dynamic performance of the building is observed when the greatest weight is given to the RMS response of displacement in the optimization process. Finally, the numerical results reveal that the proposed methodology based on DE is effective in finding the optimal TMD design configuration by reducing the maximum floor displacement up to 4% and RMS values of displacement of up to 52% in the case-study building.

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