Experimental and numerical study of I-shape slit dampers in connections

Lor, Hossein Akbari; Izadinia, Mohsen; Memarzadeh, Parham

doi:10.1590/1679-78254416

Cited by 4 publications

(3 citation statements)

References 16 publications

(10 reference statements)

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“…Moreover, an effective Figure 19. Idealization of a slit damper [175] configuration was proposed by Ghabraie et al [177,180] for solving the strain concentration problem in slit dampers. As a result of using the suggested configuration, the device was able to dissipate more energy and was more resistant to low cycle fatigue.…”

Section: Steel Slit Dampersmentioning

confidence: 99%

Development of Steel Yielding Seismic Dampers Used to Improve Seismic Performance of Structures: A Comprehensive Review

Behnamfar¹,

Almohammad-albakkar²

2023

IJE

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Seismic excitation can cause significant energy to be released within structures. By using special devices, this energy can be consumed and dissipated without deforming structural members significantly. Due to this, structural damage is minimized, casualties are prevented during earthquakes, and structures are extended in their useful life. Over the past five decades, it has been widely acknowledged that steel yielding dampers are among the best energy dissipation devices. It has been stated that the hysteretic behavior of steel yielding dampers could vary slightly depending on their geometry. From a practical point of view, they are suitable for the improvement of seismic safety in new and existing structures. The purpose of this paper is to present a review related to steel yielding dampers, their development, various types, and applications, in order to help understand the role of these dampers in improving the seismic performance of structures. In terms of their shape, steel yielding dampers can be categorized as steel plate dampers, pipe dampers, curved dampers, and slit dampers. The most common use of steel plate, such as ADAS and TADAS, and pipe dampers is within braced frames, whereas U-shaped, Jshaped, and S-shaped dampers are mostly seen in frames with chevron bracing. Steel curved dampers with a 60° angle in a steel-braced frame, on the other hand, provide the best energy dissipation and frame strength. In this direction, until today, steel slit dampers have been found to be the most commonly used steel yielding dampers.

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Section: Steel Slit Dampersmentioning

confidence: 99%

Development of Steel Yielding Seismic Dampers Used to Improve Seismic Performance of Structures: A Comprehensive Review

Behnamfar¹,

Almohammad-albakkar²

2023

IJE

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“…Slit dampers are a potentially inexpensive solution to ensure ductile behaviour in MRF connections. To such an end, Lor et al [170] and Shahri and Mousavi [171] recently proposed and tested two layouts.…”

Section: Connections In Systems With Supplementary Dampingmentioning

confidence: 99%

Seismic Design of Bolted Connections in Steel Structures—A Critical Assessment of Practice and Research

et al. 2022

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The importance of connections in steel structures is paramount, not only because it greatly influences the cost of construction and provides room for innovations, but also due to the connections’ impact on global structural behaviour. Therefore, research into innovative connections for seismic applications and related design criteria has significantly grown in recent years. However, it has been pursued mostly on local—connection or frame—levels, leaving the system analysis and code compliance levels with a meagre investigation. Moreover, less than 1% of published papers concerning steel connections and earthquake engineering are review articles. To overcome this gap, this systematic review of more than 240 references, including scientific contributions and design codes in the field aimed to cover both recent research and current shortcomings in practice and regulations. It has been found that European design rules updated to a fully performance-based design philosophy is imminent and is deemed to bring pre-qualified joints and increased complexity. Design rules have been systematized, and current hindrances have been highlighted. A deeper look into research needs and trends showed that investigations in connections for concentrically X braced frames are still a necessity, while developments in self-centring and replaceable connections as well as in simple solutions for increasing damping are expected to modify how joints are designed, as soon as semi-rigid and partial strength connections are more easily allowed by design codes.

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“…Results provided a definition of friction coefficient values for design and regression analyses, and slip test data for simplified rigid-plastic modeling in seismic analyses. Lor et al (2018) proposed a new beam-to-column connection using slit dampers to increase ductility and moment capacity in structures. The proposed connection was tested under cyclic loading and showed high seismic performance, rotational capacity, and moment capacity.…”

Section: Introductionmentioning

confidence: 99%

Numerical and analytical investigation of reduced beam section with and with yielding damper and their comparison

TahamouliRoudsari

Cheraghi

2023

Preprint

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Connections are one of the sensitive points in structures, including steel structures, which have a significant impact on the seismic behavior of the structure. One type of connection used in steel structures is the Reduced Beam Section (RBS), which reduces the moment strength of the beam near the column, resulting in less moment being transferred to the column at the final moment. In this research, 36 numerical analyses were performed using ABAQUS to investigate two cases. In the first case, a connection with a beam with a hole in the flange area was examined, with the area of the flange holes and the axial force of the column as variables. In the second case, a yield ring was used in the flange area of the beam, with the radius of the yield ring as the variable in six cases. Analytical formulas for calculating the maximum strength moment of the beam, as well as equations for analysis in the linear region, were presented. One design requirement of the yielding damper is to yield earlier than other members, and an equation was presented to ensure that yielding occurs first in the yielding loop. After performing the numerical analysis, it was observed that if the area of the flange holes is half of the area of the beam flanges, a significant decrease in strength does not occur with an increase in axial force up to a certain extent. One of the primary advantages of adding a yielding damper to the beam is the ability to adjust the maximum moment transferred to the column by changing the final moment of the beam.

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Experimental and numerical study of I-shape slit dampers in connections

Cited by 4 publications

References 16 publications

Development of Steel Yielding Seismic Dampers Used to Improve Seismic Performance of Structures: A Comprehensive Review

Development of Steel Yielding Seismic Dampers Used to Improve Seismic Performance of Structures: A Comprehensive Review

Seismic Design of Bolted Connections in Steel Structures—A Critical Assessment of Practice and Research

Numerical and analytical investigation of reduced beam section with and with yielding damper and their comparison

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