Behaviour of steel cushions subjected to combined actions

Yüksel, Ercan; Karadoğan, Faruk; Özkaynak, Hasan; Khajehdehi, Arastoo; Güllü, Ahmet; Smyrou, Eleni; Bal, İhsan Engin

doi:10.1007/s10518-017-0217-4

Cited by 23 publications

(8 citation statements)

References 8 publications

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“…This energy must be dissipated through the structure to prevent life and financial modern seismic design approach, a large portion of the imparted energy is expected to be dissipated through energy dissipation devices (EDDs). Many types of active [1][2][3] or passive [4][5][6][7][8] EDDs were designed and developed in academic and industrial areas to serve this purpose. Additional damping supplied by EDDs may reduce interstory drifts and shear forces through the structure reasonably [9].…”

Section: Introductionmentioning

confidence: 99%

Development of Finite Element Model for a Special Lead Extrusion Damper

Güllü

Çalım

Soydan

et al. 2021

Sakarya University Journal of Science

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A significant amount of seismic energy is imparted to the structures during earthquakes. The energy spreads within the structure and transforms in various energy forms as dissipated through the structure. The conventional seismic design provides specific ductile regions, namely plastic hinges, on structural elements. Therefore, the energy dissipation capacities of the structural elements and the structure enhance. However, this approach accepts that the deformations will concentrate on the plastic hinge zones and severe damage may occur on structural elements within deformation limits that are defined by the seismic codes. The modern seismic design aims to dissipate a large portion of the seismic input energy by installing energy dissipating devices (EDDs) to the structure. Thus, deformation concentrates on EDDs which can be replaced after an earthquake, and energy demand for structural elements is decreased. Lead extrusion damper (LED) is a passive EDD that utilizes the hysteretic behavior of lead. In this paper, the preliminary results of the developed three-dimensional finite element model (FEM) for a LED is presented. The results obtained from the finite element analysis (FEA) were compared with the experimental ones in which LEDs were exposed to sinusoidal displacements. Also, the applicability of the developed FEM was checked for different component dimensions given in the literature. The comparison study yielded a satisfactory consistency. Additionally, the maximum relative difference obtained for the literature devices was reduced to 12% from 39% by the developed FEM.

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Section: Introductionmentioning

confidence: 99%

Development of Finite Element Model for a Special Lead Extrusion Damper

Güllü

Çalım

Soydan

et al. 2021

Sakarya University Journal of Science

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“…Many types of energy dissipative fuses, using distinct dissipation mechanisms, e.g. friction of metals [4], [12,15,[19][20][21]. The experiments performed on SC [15,16] resulted in almost rectangular hysteretic behavior, as demonstrated in figure 1(a).…”

Section: Introductionmentioning

confidence: 99%

“…friction of metals [4], [12,15,[19][20][21]. The experiments performed on SC [15,16] resulted in almost rectangular hysteretic behavior, as demonstrated in figure 1(a). Hence, an elastic perfectly plastic model such as the one shown in figure 1(b) was proposed to simulate the hysteretic behavior of SC [15,20].…”

Section: Introductionmentioning

confidence: 99%

Characterization of energy dissipative cushions made of Ni–Ti shape memory alloy

Güllü

Danquah

Dilibal

2021

Smart Mater. Struct.

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Earthquake-resistant design of structures requires dissipating seismic energy by deformations of structural members or additional fuse elements. Owing to its easy-to-produce, plug-and-play, high equivalent damping ratio, and large displacement capacity characteristics, energy dissipative steel cushions (SCs) were found to be an efficient candidate for this purpose. However, similar to other conventional metallic dampers, residual displacement after a strong shaking is the most notable drawback of the SCs. In this work, cushions produced from Ni–Ti shape memory alloy (SMA) are evaluated numerically by experimentally verified finite element models to assess their impact on the performance of earthquake-resistant structures. Furthermore, a reinforced concrete testing frame is retrofitted with energy dissipative steel and Ni–Ti cushions. Performance of the frames (e.g. dissipated energy by the cushions, hysteretic energy to input energy ratio, maximum drift, and residual drift) with different types of cushions are evaluated by nonlinear response history analyses. The numerical results showed that the SCs are effective to reduce peak responses, while Ni–Ti cushions are more favorable to reduce residual drifts and deformations. Hence, a hybrid system, employing the steel and SMA cushions together, is proposed to reach optimal seismic performance.

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“…The feasibility of each of the proposed design solutions has been investigated within the SAFECLADDING research project supported by a grant of the European Commission as part of the program FP7‐SME‐2012 . This research activity included solutions for existing and new precast structures with isostatic, integrated, and dissipative connection systems of the cladding panels . A description of the investigated solutions for each arrangement concerning both vertical and horizontal panels is available in Refs.…”

Section: Introductionmentioning

confidence: 99%

“…15 This research activity included solutions for existing and new precast structures with isostatic, integrated, and dissipative connection systems of the cladding panels. 11,[16][17][18][19][20][21][22][23][24][25] A description of the investigated solutions for each arrangement concerning both vertical and horizontal panels is available in Refs. 10,20.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of precast concrete structures with energy dissipating cladding panel connection systems

Lago

Biondini

Toniolo

2018

Structural Concrete

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The cladding‐structure interaction of precast concrete frame systems under seismic action has not been properly addressed in the past, as shown by several failures occurred under recent earthquakes in Southern Europe, which point out the need of a revision of the current design practice and technology. Dissipative systems of connections are proposed to this purpose within a general framework for seismic design of precast structures with cladding panels. The proposed connection systems consist of friction‐based or plasticity‐based devices interposed in between adjacent cladding panels or between the panels and the resisting frame to control the level of transferred forces and limit the displacements of the structure. Monotonic and cyclic experimental tests are carried out on both single connection devices and structural sub‐assemblies of two panels. Furthermore, cyclic and pseudo‐dynamic tests on a full‐scale prototype of precast structure with cladding panels are performed. The influence on the structural response of silicone sealant is also investigated through experimental testing. The effectiveness of the tested dissipative connections of the cladding panels in enhancing the seismic performance of precast structures is demonstrated by means of nonlinear dynamic analyses considering the influence of the roof diaphragm action. Design guidelines are finally provided for both single connectors and panel structural assemblies based on equilibrium and capacity design criteria.

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Behaviour of steel cushions subjected to combined actions

Cited by 23 publications

References 8 publications

Development of Finite Element Model for a Special Lead Extrusion Damper

Development of Finite Element Model for a Special Lead Extrusion Damper

Characterization of energy dissipative cushions made of Ni–Ti shape memory alloy

Seismic performance of precast concrete structures with energy dissipating cladding panel connection systems

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