Optimum design of viscous inerter damper targeting multi-mode vibration mitigation of stay cables

Gao, Hui; Wang, Hao; Li, Jian; Wang, Wenwen; Liang, Ruijun; Zhou, Xu; Ni, Youhao

doi:10.1016/j.engstruct.2020.111375

Cited by 76 publications

(22 citation statements)

References 59 publications

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“…If the safety margins of some GTBDSs do not meet the requirement, two methods can be adopted to adjust the design scheme. If there is a large gap between s ij and s tij , the corresponding u mij of the GTBDS should be increased, and the geometric parameters should be optimized by returning to step (3). If the safety margin is close to the target, the damper of slightly larger damping parameters is needed.…”

Section: Multi-performance Objectives Optimum Design Methodsmentioning

confidence: 99%

“…Installing dampers in building structures is an effective technique to improve the safety of structures against the threat of earthquakes. [1][2][3][4] However, the deformation of some structures subjected to small earthquakes and wind load may be minimal. Thus, it is difficult to make full use of the energy dissipation capacity of the damper.…”

Section: Introductionmentioning

confidence: 99%

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Multi‐performance objectives optimum design method and vibration control application of generalized toggle–brace–damper system

Lan

et al. 2022

Earthq Engng Struct Dyn

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The toggle–brace–damper system (TBDS) is an effective displacement amplification damper occupying a large building space. The small deformation solution, which is widely used, cannot describe the feature that the displacement amplification capacity varies with the lateral displacement of the TBDS. This is not conducive to investigate the performance of the TBDS comprehensively. Therefore, the geometric design and optimization of the TBDS are lack of a theoretical basis. A generalized toggle–brace–damper system (GTBDS), a generalized form of TBDS, is proposed. It has a flexible layout and optimizes the space available. We also introduce an amplification factor of displacement increment (AFDI) that can accurately describe the performance of the GTBDS. The amplification capacity and the geometric sensitivity are two aspects of the performance. The influence of geometric parameters on the performance of the GTBDS is clarified based on the AFDI. Some regulations are also proposed to compare the performance of GTBDSs with different geometric constructions. Two geometric parameter optimization methods of the GTBDS are proposed to balance its amplification capacity, operation safety and geometric sensitivity. The relationship between the displacement amplification capacity and the energy dissipation capacity of the GTBDS is examined. The existing modal energy dissipation method (MEDM) is extended to calculate the additional damping ratio (ADR) provided by the GTBDS. Combining the calculation method of ADR and the geometric optimization methods of GTBDS, a multiperformance objectives design method of the GTBDS is proposed. The case analysis verifies the effectiveness and the feasibility of the design method.

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Section: Multi-performance Objectives Optimum Design Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi‐performance objectives optimum design method and vibration control application of generalized toggle–brace–damper system

Lan

et al. 2022

Earthq Engng Struct Dyn

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“…If the deformation capacity cannot meet the requirement under maximum credible earthquake (MCE), the deformation performance can be improved by increasing the aspect ratios of the strips. The equivalent viscous damping ratio can effectively quantify the energy dissipation capacity of dampers or members, and it can be calculated by the following equation 38 :…”

Section: Stiffness Degradationmentioning

confidence: 99%

Mechanical performance and damping effect of multi‐stage yield metal sleeve damper

Cheng

et al. 2021

Structural Contr & Hlth

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The traditional metal yield dampers such as buckling-restrained brace are designed only for strong earthquakes. Under small earthquake, it is difficult to dissipate the energy for common single-stage yield damper. In addition, it is difficult to observe its damage state after earthquake and inconvenient to replace the energy dissipation components separately. Therefore, a new metal sleeve damper which can dissipate the energy under all levels of earthquakes is proposed in this study. Due to the different yield displacements of the energy dissipation strips with different aspect ratios, the damper has multi-stage yield characteristics. Considering the stiffness degradation effect from the semi-rigid joints on both sides of the strips, the mechanical performance parameters of the damper are derived. The quasi-static experiment of the damper is carried out. Finite element method (FEM) is utilized to simulate the performance of the damper. At last, the damping effects of the multi-stage yield damper and common single-stage yield damper are compared. The results indicate that the accuracies of the mechanical performance parameters computation formulas are high. The energy dissipation performance of the multi-stage yield damper is excellent. The correctness of the finite element (FE) modeling method is verified. The seismic performance of the RC frame with the multi-stage yield damper is improved significantly under all levels of earthquakes. Comparing with the single-stage yield damper, the multi-stage yield damper is more effective in the vibration control of the reinforced concrete (RC) frame.finite element method, mechanical performance, metal damper, multi-stage yield, quasistatic experiment | INTRODUCTIONMetal yield dampers which are widely used in structural seismic control have the advantages of clear mechanism and stable performance. 1 Common metal yield dampers mainly include buckling-restrained brace (BRB), shear panel damper, bending panel damper, and lead damper. 2,3 BRB has been intensively investigated, and it is widely used in seismic structures since its excellent damping performance and convenient installation. 4 The mechanical property of the BRB was analyzed by Carmeron et al. 5 A quasistatic experiment was carried out to obtain the hysteretic performance of the BRB. The Bouc-Wen model was

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“…erefore, a variety of damping elements are introduced to the TMD to improve vibration control efficiency and robustness, such as friction dampers [15,16], eddy-current components [17][18][19][20], inerters [21][22][23][24], particle dampers [25,26], and shape memory alloys [27][28][29]. Most of these damping elements are expensive in cost and difficult in maintenance.…”

Section: Introductionmentioning

confidence: 99%

Seismic Vibration Mitigation of a Cable-Stayed Bridge with Asymmetric Pounding Tuned Mass Damper

Zhang

Tan

Liu

et al. 2021

Mathematical Problems in Engineering

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In order to mitigate the seismic response of a cable-stayed bridge, a new type damping device named asymmetric pounding tuned mass damper (APTMD) is developed in this paper on the basis of the traditional symmetric pounding tuned mass damper. The novel APTMD has three parameters to be determined: the left-side gap, the right-side gap, and the frequency ratio. A numerical model of the APTMD damping system is established with consideration of both the computational efficiency and accuracy to enable the parametric optimization of the damper. The numerical model is based on a simplified model of the cable-stayed bridge and a nonlinear pounding force model. The genetic algorithm is utilized for the optimization of the damper. Afterwards, the cable-stayed bridge is subjected to 20 recorded ground motions to evaluate the vibration control effectiveness of the APTMD. Four systems are considered: (1) without dampers; (2) with a TMD; (3) with a PTMD; and (4) with an APTMD. Time history analysis reveals the following: (1) those dampers can all effectively suppress the vibration of the bridge and (2) the vibration control effectiveness of the APTMD is slightly better than the TMD and the PTMD.

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Optimum design of viscous inerter damper targeting multi-mode vibration mitigation of stay cables

Cited by 76 publications

References 59 publications

Multi‐performance objectives optimum design method and vibration control application of generalized toggle–brace–damper system

Multi‐performance objectives optimum design method and vibration control application of generalized toggle–brace–damper system

Mechanical performance and damping effect of multi‐stage yield metal sleeve damper

Seismic Vibration Mitigation of a Cable-Stayed Bridge with Asymmetric Pounding Tuned Mass Damper

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