Vibration control in buildings under seismic excitation using optimized tuned mass dampers

Brandão, Francisco da Silva; Miguel, Letícia Fleck Fadel

doi:10.3221/igf-esis.54.05

Cited by 11 publications

(5 citation statements)

References 30 publications

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“…For this, NBR 15421 [18] will be used, which establishes parameters and criteria to determine the earthquake forces on structures. The methodology used will be based on the synthetic wind model, addressed in the works of Corbani [14] and Brandão [19]. For calculation purposes, the earthquake will be considered a time series loading, obtained through the Kanai-Tajimi spectrum [20].…”

Section: Figure 2 Wind Power Spectrum (Davenport)mentioning

confidence: 99%

H∞ hybrid control and MRD in a steel frame building subjected to excessive vibrations caused by the dynamic action of wind and earthquake

De Gois Silva,

Chavarette

2024

J. Appl. Math.

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The dynamic loads from earthquakes and winds can destroy lives, cause collapse in civil structures, and interrupt basic services provided to the population. In this scenario, structural designs must be developed to decrease the damage induced by these actions. The objective of this work is to design a hybrid controller based on the H¥ optimization via state feedback and the magneto-rheological damper (MRD) to mitigate the excessive vibrations of a three-story steel frame building, represented through the shear building model, subjected to the simultaneous dynamic action of wind and earthquake. All research is based on computational simulation, experimental research and results will not be addressed. In the numerical analysis, digital computer and MATLAB® software are used, and implemented codes generate the expected results based on the mathematical modeling. With the application of the H¥ control technique via state feedback, the displacements were reduced by 77%. With MRD this reduction was 79%. With the hybrid controller, this reduction was 100%. Thus, the verifications in relation to maximum displacements were met for NBR 15421:2006, NBR 8800:2008 and NBR 6118:2014. From the results, it is concluded that the hybrid controller proved to be more efficient and achieved the proposed objective. The exogenous inputs had zero influence on the behavior of the system output.

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Section: Figure 2 Wind Power Spectrum (Davenport)mentioning

confidence: 99%

H∞ hybrid control and MRD in a steel frame building subjected to excessive vibrations caused by the dynamic action of wind and earthquake

De Gois Silva,

Chavarette

2024

J. Appl. Math.

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“…Te control criterion h i /400 of each story height, in which h i is the ith height of the ith story, was employed in the analyses. Tis criterion is presented in the ANSI/AISC 360− 16 code of the American Institute of Steel Construction [3] and was also employed by many authors such as the authors of [46][47][48][49][50][51][52].…”

Section: Story Drift Control Criterionmentioning

confidence: 99%

A New Methodology for Optimal Design of Hybrid Vibration Control Systems (MR + TMD) for Buildings under Seismic Excitation

Brandão,

Miguel

2023

Shock and Vibration

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This study proposes a new methodology, based on the optimization procedure by a metaheuristic algorithm, for designing a hybrid vibration control system to mitigate the dynamic response of buildings under nonstationary artificial earthquakes (NSAEs). For illustration purposes, a 10-story shear building is studied. The hybrid control system involves the use of an MR damper (MR) and a tuned mass damper (TMD) located in different places of the structure. To describe the behavior of the MR, the modified Bouc–Wen model (MBW) was used. To calculate the damping force of the MR, the clipped optimal control associated with linear quadratic regulator (LQR), CO-LQR, was considered. The optimization was performed using the whale optimization algorithm (WOA) and seismic load generated by the Kanai–Tajimi spectrum. Different control scenarios were evaluated: MR-OFF, MR-ON, CO-LQR, STMD, and CO-LQR (MR + TMD) to determine the best control scenario that can effectively control the structure. Overall, the optimized hybrid control scenario (MR + TMD) was the only one able to adapt all story drifts to the control criterion of the consulted normative. Then, CO-LQR (MR + TMD), designed via the methodology proposed in this work, proved to be the best alternative to control the seismic response of this building.

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“…Fig. 7 shows the parameters which must be updated, where a is decreased from 2 to 0 in order to provide exploration and exploitation, respectively; A and C, are coefficients utilized to calculate the best current solution; l, is a random number in [-1,1]; and p, is a random number in [0,1] [25].…”

Section: The Whale Optimization Algorithm (Woa)mentioning

confidence: 99%

Optimization of a reinforced concrete structure subjected to dynamic wind action

Brito

Miguel

2021

Frattura Ed Integrità Strutturale

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This work proposes a methodology to optimize a reinforced concrete structure. For this, the Whale Optimization Algorithm (WOA) algorithm was used, an algorithm from the group of metaheuristic algorithms, which presents an easy computational implementation. As a study object, a frame structure adapted from a real reinforced concrete building was used, subjected to the dynamic action of artificially generated synoptic wind. The objective function is to reduce the volume of concrete of the structure. For that, the dimensions of the cross-sections were used as design variables, and the maximum displacement at the top imposed by the ASCE / SEI 7-10 standard as a lateral constraint, as well as the maximum story drift between floors. In addition to this structural optimization, it was also proposed the use and optimization of Tuned Mass Dampers (TMD), in different quantities, positions and parameters, improving the dynamic response of the reinforced concrete building. The results show that for this situation it was possible to reduce the concrete volume of the structure by approximately 24%, respecting the maximum limit of displacement at the top required by the standard.

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Vibration control in buildings under seismic excitation using optimized tuned mass dampers

Cited by 11 publications

References 30 publications

H∞ hybrid control and MRD in a steel frame building subjected to excessive vibrations caused by the dynamic action of wind and earthquake

H∞ hybrid control and MRD in a steel frame building subjected to excessive vibrations caused by the dynamic action of wind and earthquake

A New Methodology for Optimal Design of Hybrid Vibration Control Systems (MR + TMD) for Buildings under Seismic Excitation

Optimization of a reinforced concrete structure subjected to dynamic wind action

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