State-of-the-Art Review of Metallic Dampers: Testing, Development and Implementation

Javanmardi, Ahad; Ibrahim, Zainah; Ghaedi, Khaled; Ghadim, Hamed Benisi; Hanif, Muhammad Usman

doi:10.1007/s11831-019-09329-9

Cited by 112 publications

(35 citation statements)

References 117 publications

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“…Table 2 also shows the accumulated inelastic deformation ratio, η, and the cumulative ductility factor [6][7][8][9][10][11], µ CUM , that are typical parameters used to characterise the performance of dampers. These parameters are defined later in Equations (5) and (7), respectively. The shape of the hysteretic loop Q-δ obtained in one cycle of imposed deformation at maximum amplitude δmax is typically characterised by the equivalent viscous ratio ξ, defined as follows: where Wc is the energy dissipated in one cycle and Qmax the force attained at δmax.…”

Section: Hysteretic Behaviourmentioning

confidence: 99%

Section: Hysteretic Behaviourmentioning

confidence: 99%

“…The value of parameter b' is a good indicator of the ultimate energy dissipation capacity of the damper. Comparing the b' obtained for the new SS- The normalized Q-δ curves obtained in each test until failure ( Figure 15) were decomposed as explained above and the values obtained for the nondimensional parameters defined in Equations (4) and (5) are summarized in Table 3. Figure 18 shows the normalized skeleton curves together with an approximated trilinear curve (bold dotted line) where k p1 = 1/2.5 and k p2 = 1/14.…”

Section: Ultimate Energy Dissipation Capacity and Prediction Of Failurementioning

confidence: 99%

“…Dampers based on metal yielding (metallic dampers) are made of materials with a large inherent plastic deformation capacity and shaped to avoid any source of stress concentration that could jeopardise the inherent high energy dissipation capacity of the material. Many metallic dampers have been developed in the last decades, and a stateof-the-art review of metallic dampers can be found in [5]. The original designs were based on simple torsion or bending of steel plates and uniaxial deformation of U-shape strips.…”

Section: Introductionmentioning

confidence: 99%

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A New Stainless-Steel Tube-in-Tube Damper for Seismic Protection of Structures

2020

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This paper investigates a new stainless-steel tube-in-tube damper (SS-TTD) designed for the passive control of structures subjected to seismic loadings. It consists of two tubes assembled in a telescopic configuration. A series of slits are cut on the walls of the exterior tube in order to create a series of strips with a large height-to-width ratio. The exterior tube is connected to the interior tube so that when the brace-type damper is subjected to forced axial displacements, the strips dissipate energy in the form of flexural plastic deformations. The performance of the SS-TTD is assessed experimentally through quasi-static and dynamic shaking table tests. Its ultimate energy dissipation capacity is quantitatively evaluated, and a procedure is proposed to predict the failure. The cumulative ductility of the SS-TTD is about 4-fold larger than that reported for other dampers based on slit-type plates in previous studies. Its ultimate energy dissipation capacity is 3- and 16-fold higher than that of slit-type plates made of mild steel and high-strength steel, respectively. Finally, two hysteretic models are investigated and compared to characterise the hysteretic behaviour of the SS-TTD under arbitrarily applied cyclic loads.

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Section: Hysteretic Behaviourmentioning

confidence: 99%

Section: Hysteretic Behaviourmentioning

confidence: 99%

Section: Ultimate Energy Dissipation Capacity and Prediction Of Failurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A New Stainless-Steel Tube-in-Tube Damper for Seismic Protection of Structures

2020

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“…The idea of installing metallic dampers for seismic structural control was at first introduced by Kelly et al (1972). Over the years, many authors have proposed various devices that have differing in shape and dissipative mechanisms (Javanmardi et al, 2019). Among them, Bergman and Goel (1987) and Whittaker et al (1991) developed the Added Damping and Stiffness (ADAS) system; its dissipation capacity is based upon flexural deformation of X-shaped metallic plates connected at the top and bottom end to a rigid element, which thus does not allow for rotation.…”

Section: Introductionmentioning

confidence: 99%

DIBRAST: A Computer-Aided Seismic Design Procedure for Frame Structures Equipped With Hysteretic Devices

Nuzzo

Ciliento

Caterino

2020

Front. Built Environ.

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This paper describes a comprehensive computer-aided seismic design approach for both new and existing frame structures equipped with hysteretic dampers. Despite continuous advancements in the state of the art demonstrating the effectiveness of these devices in mitigating seismic hazard, non-linearities involved in the problem and the articulated nature of most of the available design procedures often make them quite difficult to be implemented for real complex structures. To promote widespread use of hysteretic dampers, we present a thorough design approach that includes the application of a specific displacement-based design procedure by means of a computeraided support tool developed in a Visual Basic environment and named DIBRAST. The software is realized to drive the designer through the dissipative system's design. Required iterations are automated, thus significantly reducing the processing time. As its final output, it delivers the mechanical properties of the damping braces in order to meet a specific performance objective. In order to further support practitioners in the geometrical characterization of actual design dampers, authors developed an additional Visual Basic tool-the Shear Link Non-Linear Model-that is able to provide yielding force and elastic stiffness of a specific type of hysteretic device according to its geometry and material. In addition, geometric details of each device can be preliminary determined by means of newly proposed design charts, presented herein, that allow us to take into account the buckling issue too. Both developed tools are freely available online. A case study is provided to demonstrate the effectiveness of the proposed design approach and tools.

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Shake table tests on a reinforced concrete waffle‐flat plate structure with new hybrid energy dissipation devices

Benavent‐Climent

Escolano‐Margarit

Yurkin

et al. 2022

Earthq Engng Struct Dyn

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This paper presents a new hybrid energy dissipation device and investigates experimentally its capability to improve the seismic response of an inherently very flexible structural system: a reinforced concrete waffle-flat plate structure. The new device combines in parallel within a single device a low-cost viscoelastic (VE) component and a metallic yielding (MY) component. The device has a gap that prevents deformations on the MY component in the range of displacements caused by wind or low intensity earthquakes, to avoid high-cycle fatigue damage. The MY component is expected to activate under the design or the maximum credible earthquake, providing the main structure with lateral stiffness, and a reliable and large source of energy dissipation capacity. Six new hybrid energy dissipation devices (energy dissipation system) were installed in a scaled two-story portion of a prototype RC waffle-flat plate structure (main structure) designed only for gravity loads, without considering special ductility detailing or capacity design rules for the columns. The VE component of the hybrid energy dissipation devices reduced the translational periods with largest effective modal mass along the horizontal directions X and Y to 60%, and increased the fraction of damping to about 12%. The main structure with the energy dissipation system was subjected to bidirectional shake table tests that represented frequent, design and maximum credible earthquakes. In the tests, the main structure remained basically undamaged under the frequent and the design earthquakes, whereas it suffered minor (reparable) damage under the maximum credible earthquake. The MY component remained undeformed under low intensity earthquakes.

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State-of-the-Art Review of Metallic Dampers: Testing, Development and Implementation

Cited by 112 publications

References 117 publications

A New Stainless-Steel Tube-in-Tube Damper for Seismic Protection of Structures

A New Stainless-Steel Tube-in-Tube Damper for Seismic Protection of Structures

DIBRAST: A Computer-Aided Seismic Design Procedure for Frame Structures Equipped With Hysteretic Devices

Shake table tests on a reinforced concrete waffle‐flat plate structure with new hybrid energy dissipation devices

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