Optimal design of rotational friction dampers for improving seismic performance of inelastic structures

Jarrahi, H.; Asadi, Azita; Khatibinia, Mohsen; Etedali, Sadegh

doi:10.1016/j.jobe.2019.100960

Cited by 42 publications

(13 citation statements)

References 33 publications

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“…It has been shown that the efficiency of the energy dissipation of wall friction dampers under far-field earthquakes was 118% higher than that under near-field ones [13]. In another study [14], a rotational friction damper was investigated, and the modeling results showed 54% and 97% reductions in the maximum roof displacement and hysteresis energy, respectively. Recent researches [15] investigated five different damper location formats in SAP2000 based on the El Centro earthquake record.…”

Section: Introductionmentioning

confidence: 99%

A Simplified Matrix Analysis Approach to Multi-story Buildings Involving a Friction Damper

Gharra

Khanlari

Marnani

2021

Period. Polytech. Civil Eng.

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Damping through friction tends to be one of the most efficient methods to suppress damage to structures from earthquakes. Realizing robust structures is therefore highly dependent on designing for the dynamic forces of friction-damped structures and exploring their reliability against natural disasters. This paper presents a simplified matrix analysis algorithm for multi-story friction- damped buildings. The behavior of friction-damped systems has analyzed more accurately by modeling the master-slave degree of freedom of the joints. First, the formulation of the problem is discussed, and a condensed general equation is derived. Then, an end-to-end solution is proposed to find the responses of structures. The displacement response of each story has been carried out in both condensed and non-condensed general equations, and the results clearly show the accuracy of the proposed method. The numerical analysis and the results of the simulation of various friction-damped structures depicts the proposed approach consists with the commercial finite element method and is applicable for the analysis various types of structures. It is noted that the acceleration and displacement responses of the structures investigated under the proposed method and the traditional finite element method are so consistent that only a 1.5% difference is observed. Moreover, as a result of the proper allocation of degrees of freedom during the analysis, this method yields a reduction in computational costs especially in large buildings.

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Section: Introductionmentioning

confidence: 99%

A Simplified Matrix Analysis Approach to Multi-story Buildings Involving a Friction Damper

Gharra

Khanlari

Marnani

2021

Period. Polytech. Civil Eng.

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“…The principle and design method of the structure with damper are studied by many scholars. According to the difference of the structural systems, the different dampers are used in the structure including soft steel dampers, viscoelastic dampers and friction pendulum dampers [1][2][3][4]. To improve the energy-dissipating capacity and deflection of the damper, the optimal design and test study of the damper were carried out [1], and the novel damper was also developed [2].…”

Section: Introductionmentioning

confidence: 99%

“…According to the difference of the structural systems, the different dampers are used in the structure including soft steel dampers, viscoelastic dampers and friction pendulum dampers [1][2][3][4]. To improve the energy-dissipating capacity and deflection of the damper, the optimal design and test study of the damper were carried out [1], and the novel damper was also developed [2]. Meanwhile, the effect of the viscoelastic damper on the structural dynamic response was studied [3], and the shaking table test of the structure with damper was developed to analyse the seismic mitigation efficiency of the damper [4].…”

Section: Introductionmentioning

confidence: 99%

Seismic Mitigation Efficiency Study of the Coupling Beam Damper in the Shear Wall Structure

Huang

2021

CEJ

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Coupling beam damper can be easily repaired in the post-earthquake, which can dissipate the seismic energy of the structure in the earthquake action. In this paper, the seismic mitigation efficiency of the coupling beam damper in the shear wall structure is analysed by using the fast nonlinear analysis method. Meanwhile, the effect of the layout location and number of the coupling beam dampers on the seismic mitigation efficiency of the structure are studied. Finally, the effect of the performance parameter of the coupling beam damper on the seismic mitigation efficiency is also analysed. The results indicate that: the story shear force and the drift angle of the shear wall structure can be effectively decreased because of the coupling beam damper, and the maximum decreased amplification of the story drift angle and base shear force can reach up to 16.7% and 8.8% respectively. Relating to the decreased amplification of the base shear force, the decreased amplification of the story drift angle of the structure with coupling beam damper is obvious. The coupling beam damper installed in the upper part of the structure is more economical, because the deformation of the structural coupling beam is mainly concentrated in the upper part of the structure. To ensure economic of the structure with damper, the reasonable coupling damper performance parameter should be determinate according to the dynamic response of the shear wall structure in the earthquake action. The above research work can provide guidance for the seismic design of the shear wall structure.

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“…Ghasemi et al [3] used an improved ideal gas molecules movements (IGMM) in SMA dampers for vibration control of Jacket-type offshore structures. The optimal design of rotational friction dampers using particle swarm optimization (PSO) is studied in [4]. Kaveh et al [5] compared the H 2 and H ∞ norm of roof displacement transfer function as the objective functions for optimum design of TMD under near-fault and far-fault earthquake motions.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of Passive and Active Control Systems in Seismic-excited Structures Using a New Modified TLBO

Hosseinaei

Ghasemi

Etedali

2020

Period. Polytech. Civil Eng.

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Vibration control devices have recently been used in structures subjected to wind and earthquake excitations. The optimal design problems of the passive control device and the feedback gain matrix of the controller for the seismic-excited structures are some attractive problems for researches to develop optimization algorithms with the advancement in terms of simplicity, accuracy, speed, and efficacy. In this paper, a new modified teaching–learning-based optimization (TLBO) algorithm, known as MTLBO, is proposed for the problems. For some benchmark optimization functions and constrained engineering problems, the validity, efficacy, and reliability of the MTLBO are firstly assessed and compared to other optimization algorithms in the literature. The undertaken statistical indicate that the MTLBO performs better and reliable than some other algorithms studied here. The performance of the MTLBO will then be explored for two passive and active structural control problems. It is concluded that the MTLBO algorithm is capable of giving better results than conventional TLBO. Hence, its utilization as a simple, fast, and powerful optimization tool to solve particular engineering optimization problems is recommended.

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Optimal design of rotational friction dampers for improving seismic performance of inelastic structures

Cited by 42 publications

References 33 publications

A Simplified Matrix Analysis Approach to Multi-story Buildings Involving a Friction Damper

A Simplified Matrix Analysis Approach to Multi-story Buildings Involving a Friction Damper

Seismic Mitigation Efficiency Study of the Coupling Beam Damper in the Shear Wall Structure

Optimal Design of Passive and Active Control Systems in Seismic-excited Structures Using a New Modified TLBO

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