Methodology for the simultaneous optimization of location and parameters of friction dampers in the frequency domain

Miguel, Letícia Fleck Fadel; Miguel, Leandro Fleck Fadel; López, Rosalía Rodríguez

doi:10.1080/0305215x.2018.1428318

Cited by 11 publications

(11 citation statements)

References 27 publications

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“…Today, the use of passive dampers to control vibrations of buildings subjected to earthquakes is very common. For example, Miguel et al [20][21][22] and Ontiveros-Pérez et al [23] use friction dampers, while Fadel Miguel et al [24,25], Vellar et al [26], Brandão and Miguel [27], Lee and Eun [28], Rahmani and Könke [29], Kaveh et al [30], and Khazaei et al [31] among others use TMD and multiple tuned mass dampers (MTMD).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Multiple Tuned Mass Dampers for Road Bridges Taking into Account Bridge‐Vehicle Interaction, Random Pavement Roughness, and Uncertainties

Miguel

Santos

2021

Shock and Vibration

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Road bridge designs are based on technical standards, which, to date, consider dynamic loading as equivalent static loads. Additionally, the few engineers who perform a dynamic analysis typically do not consider the effects of bridge-vehicle interaction and also simplify the road’s irregularity profile. Moreover, often, even when a simplified dynamic analysis is carried out and shows that there will be a high dynamic amplification factor (DAF), designers prefer to solve this problem by adopting high safety factors and thereby oversizing the bridge, rather than using energy dissipation devices that would allow reducing the amplitude of vibration. In this context, the present work proposes a complete methodology to minimize the dynamic response of road bridges by optimizing multiple tuned mass dampers (MTMD), taking into account the bridge-vehicle interaction, the random profile of pavement irregularities, and the uncertainties present in the coupled system and in the excitation. For illustrative purposes, the coupled vibration problem of a regular truck traveling on a random road profile over a typical Brazilian bridge is analyzed. Three different scenarios for the MTMD are considered. The proposed optimization problem is solved by employing the Whale Optimization Algorithm (WOA). The results showed the excellent ability of the proposed methodology, reducing the bridge’s DAF to acceptable values for all analyzed cases, considering or not the uncertainties present in the system. Furthermore, the results obtained by the proposed methodology are compared with results obtained using classical tuned mass damper (TMD) design methods, showing the best performance of the proposed optimization method. Thus, the proposed method can be employed to optimize MTMD, improving bridge design.

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Section: Introductionmentioning

confidence: 99%

Optimization of Multiple Tuned Mass Dampers for Road Bridges Taking into Account Bridge‐Vehicle Interaction, Random Pavement Roughness, and Uncertainties

Miguel

Santos

2021

Shock and Vibration

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“…The results for a three-story structure showed that optimising the damper location and frictional force could reduce the risk of failure by up to 80%. Miguel and Lopez (2018) presented an approach to simultaneously optimise the frequency domain's frictional location and friction damper parameters. One of the advantages of Miguel's study was a significant reduction in computational time.…”

Section: Introductionmentioning

confidence: 99%

A Combined Analytical Method for Intelligent Control of Friction Damped Structures

Gharra¹,

Khanlari²,

Marnani³

2021

JST

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Controlling structures and increasing the prognosis of their behaviour before natural disasters are the most critical issues in structural engineering. To that end, predicting the destructive effects of earthquakes on both acceleration and displacement of structures would be beneficial. This paper suggests an intelligent control system that realises simultaneous control of acceleration and displacement parameters. There are two modules in the system. First, the preserving module aims to estimate the crisis thresholds of acceleration and displacement based on the historical seismic data of each area. Second, the processing module finds the optimum value of the slip load of the friction damper so that both acceleration and displacement are controlled. We introduce an analytical method based on a matrix analysis approach and heuristic algorithm (MAHA) as a core of the processing module. MAHA would analyse the structure response, and the friction damper would determine the optimum slip load. The numerical and software simulation results for various one-bay and two-bay steel structures show that the proposed intelligent control system applies to multiple frictions damped structures under different earthquake records. In addition, a control level of 80% in acceleration and displacement of structures is achieved compared to an uncontrolled state. Moreover, the mentioned system enables the engineers to find appropriate friction dampers during the design of structures.

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“…Regarding the use of viscous damper, an interesting study is presented by [6] where two search methods based on the genetic algorithms are adopted to examine the optimal distribution of damping coefficients for viscous dampers in buildings under three different earthquake records. In the work presented by [7], a new methodology for the simultaneous optimization of placement and forces of friction dampers for buildings subjected to seismic loads, was proposed. A six-story shear building was analyzed, and a metaheuristic algorithm was utilized to solve the proposed problem.…”

Section: Introductionmentioning

confidence: 99%

“…The passive system using TMD is an extremely useful type of control for mitigating natural hazards and enhancing the safety and serviceability of structural systems. As these devices do not require an external power source for operation and they utilize the motion of the structure to develop the control forces, they are cheaper and simpler than active and semiactive control devices, for example, and, consequently, they are broadly used in structures around the world [7]. For a structure equipped with single TMD, the device should generally be installed at the top of the structure and its natural frequency is tuned around the frequency of the fundamental mode, which has the most influence on the response of the structure, so when the structure vibrates, the TMD vibrates with the same frequency and absorbs part of the energy from the main system [15][16].…”

Section: Introductionmentioning

confidence: 99%

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

Brandão

Miguel

2020

Frattura Ed Integrità Strutturale

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Earthquakes can cause vibration problems in many types of structures, generating large displacements. The interstory drift is a design criterion very used in seismic analysis and the structural control is an alternative to reduce these displacements and improve the performance of these structures adapting them to the imposed criteria. TMD is a device widely used due to the simple principle of operation and many successful applications in real life practice. This paper investigates the use of optimized TMD for reduction of maximum horizontal displacement at the top floor and interstory drift of a steel building under seismic excitation considering three scenarios: single TMD at the top floor; MTMD horizontally arranged at the top floor; and MTMD vertically arranged on the structure. By a metaheuristic optimization algorithm, the parameters and positions of the devices are obtained. Three real and one artificial earthquakes are employed in the simulations. The results showed that all proposed scenarios are efficient in reducing top floor response and interstory drift to values below of the interstory drift limits allowed by the standard code consulted. However, Scenario 2 presented the best reduction for the top displacement and interstory drift to the critical floor for the worst earthquake considered.

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Methodology for the simultaneous optimization of location and parameters of friction dampers in the frequency domain

Cited by 11 publications

References 27 publications

Optimization of Multiple Tuned Mass Dampers for Road Bridges Taking into Account Bridge‐Vehicle Interaction, Random Pavement Roughness, and Uncertainties

Optimization of Multiple Tuned Mass Dampers for Road Bridges Taking into Account Bridge‐Vehicle Interaction, Random Pavement Roughness, and Uncertainties

A Combined Analytical Method for Intelligent Control of Friction Damped Structures

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

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