Development of a novel combined system of deformation amplification and added stiffness and damping: Analytical result and full scale pseudo-dynamic tests

Tapia, Nicolás; Almazán, José L.; Baquero, Juan

doi:10.1016/j.engstruct.2016.04.004

Cited by 13 publications

(5 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Displacement amplification mechanisms are recommended to improve the energy dissipation efficiency of dampers. These mechanisms have been proven to have a significant effect 5–15 . Another advantage of these mechanisms is that it is possible to deduce the required damping force, which reduces the damper volume and saves the cost of the damper 9,10 .…”

Section: Introductionmentioning

confidence: 99%

“…These mechanisms have been proven to have a significant effect. [5][6][7][8][9][10][11][12][13][14][15] Another advantage of these mechanisms is that it is possible to deduce the required damping force, which reduces the damper volume and saves the cost of the damper. 9,10 The toggle-brace-damper system (TBDS) is widely studied as a typical amplification mechanism.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Lan

et al. 2022

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

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

View full text Add to dashboard Cite

show abstract

“…Pseudodynamic testing, also called hybrid testing, is considered as an effective research technique to study the structural performance under seismic loading [1][2][3][4][5][6][7][8]. e procedure of a pseudodynamic test contains numerical calculation, loading control and response measurement.…”

Section: Introductionmentioning

confidence: 99%

“…Central Difference Method (CDM) is commonly used in RTH tests, and its basic assumption is described in equation (1). en acceleration and velocity terms can be substituted by displacement terms.…”

Section: Introductionmentioning

confidence: 99%

Study on the Stabilities of RTH Tests Using the CDM Method considering Two Kinds of Systematic Errors

Peng

Guan

Liang

2022

Security and Communication Networks

View full text Add to dashboard Cite

Real-time hybrid (RTH) test is a promising test method to investigate seismic responses of structures and is essentially a time history analysis. Therefore, an in-depth understanding of the control algorithm, such as a central difference method (CDM), is important for this method. In this paper, stabilities of the CDM considering two kinds of errors are investigated theoretically and experimentally. It turns out that the convergence criterion of the CDM cannot be changed by constant errors but can be changed by proportional errors. The lowest structural natural period to keep the results stable increases with the increase of the ratio of the displacement error to the interface displacement and the integration time step. At last, the theoretical result of the stability of the CDM considering two kinds of systematic errors are confirmed by the proposed test system with a natural rubber bearing.

show abstract

“…19 Additionally, traditional friction dampers (TFD) without amplification effect impose greater bolt pretension to generate higher friction forces, which may cause the increase of unevenness and loss rate of the bolt pretension. 20 To solve the above problems, Tapia et al 21 proposed a translation-type deformation-amplified friction damper composed of multiple pulleys and straps and conducted pseudo-dynamic tests on a steel frame equipped with novel dampers. The test results illustrated that the novel dampers provided an additional 40% reduction of the structural displacement response compared to the TFD.…”

Section: Introductionmentioning

confidence: 99%

Development and optimization of a novel response‐amplified friction damper with different friction pairs

Gao,

Song,

Wang

et al. 2023

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

In order to improve the efficiency of friction dampers, a shear‐type response‐amplified friction damper (RAFD) was proposed, which utilized a lever mechanism to amplify the shear displacement and increase the sliding distance of friction pairs. Cyclic loading tests were conducted on 12 RAFD specimens to evaluate the effects of machining processes, friction materials, loading protocols, and bolt pretension on the mechanical performance of the specimens. The results showed that the RAFD specimens with NAO and brass friction pads exhibited plump hysteresis loops, and the bearing capacity, effective stiffness, energy dissipation, and equivalent viscous damping ratio all met the stability requirements of FEMA 356 for the friction damper. Reducing the clearance between pins and holes and strengthening the hole edges shortened the plateau near zero resistances of the hysteresis loops by 75%–90%. Furthermore, combined with rotational analysis of the lever, a design methodology for the RAFD specimen was developed. Based on the response amplification factor R, key mechanical indices such as bearing capacity and equivalent friction coefficient were derived, and a theoretical hysteresis model for the RAFD was constructed, which matched well with experimental results.

show abstract

Development of a novel combined system of deformation amplification and added stiffness and damping: Analytical result and full scale pseudo-dynamic tests

Cited by 13 publications

References 42 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

Study on the Stabilities of RTH Tests Using the CDM Method considering Two Kinds of Systematic Errors

Development and optimization of a novel response‐amplified friction damper with different friction pairs

Contact Info

Product

Resources

About