A modified friction damper for diagonal bracing of structures

Monir, Habib Saeed; Zeynali, Keyvan

doi:10.1016/j.jcsr.2013.04.004

Cited by 72 publications

(32 citation statements)

References 4 publications

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“…To date, the most widely used isolation devices are various types of dampers. Monir and Zeynali [17] tested a developed friction damper installed inside a SDOF steel frame through a shaking table under several earthquake excitations, and it proved that the proposed friction damper reduced the lateral displacements and the base shears of the multistory building. Hwang et al [18] conducted a shaking table test for a three-story steel structure to investigate the seismic responses of the structure with or without linear viscous dampers, and the test results showed that the toggle-brace system constructed by linear viscous dampers enhanced the seismic response control on a stiff structure.…”

Section: Introductionmentioning

confidence: 97%

Experimental Studies of Single‐Layer Reticulated Domes with Isolated Supports

Nie

Liu

2018

Shock and Vibration

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To study the seismic behavior of a single-layer reticulated dome subjected to severe earthquakes, a series of shaking table tests were conducted for this paper. Seismic responses including the acceleration, displacement, and strains gathered at the members and nodes were discussed. The dynamic characteristics, including structure frequencies and damping ratio, were obtained through the results under the input excitation of white noise and the fast sine sweeping with different amplitudes. Various isolation devices usually installed in the upper portion of the structures have been widely used to reduce the dynamic responses for more than three decades. However, these isolation devices deal mostly with either horizontal isolation or vertical isolation, which is not applicable for synchronous isolation in both horizontal and vertical isolation. Therefore, an innovative isolated support for three-dimensional isolation was invented. In order to understand the earthquake-isolation effects of a single-layer reticulated dome with the isolated support, a series of shaking table tests were conducted. The dynamic behavior of the structure was then investigated and discussed using the acceleration and displacement responses of the tested structures with or without the isolated supports. The experimental results show that the isolated support invented in this study had a remarkable earthquake-isolation action in both horizontal and vertical isolation.

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Section: Introductionmentioning

confidence: 97%

Experimental Studies of Single‐Layer Reticulated Domes with Isolated Supports

Nie

Liu

2018

Shock and Vibration

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“…The friction dampers can dissipate the input energy to the structure with a nondestructive ductile mechanism with stable hysteresis loops . A bolted connection with slotted holes, namely the slotted bolted connection (SBC), provides more robust and ductile performance through friction sliding instead of yielding the sacrificial members.…”

Section: Introductionmentioning

confidence: 99%

“…[19] The friction dampers can dissipate the input energy to the structure with a nondestructive ductile mechanism with stable hysteresis loops. [20][21][22][23][24] A bolted connection with slotted holes, namely the slotted bolted connection (SBC), provides more robust and ductile performance through friction sliding instead of yielding the sacrificial members. The performance of an SBC is usually determined by the applied clamping force and the friction coefficient (μ) between the opposing sliding plates, which is usually material dependent.…”

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confidence: 99%

Comprehending the ductile behavior of slotted bolted connections

Shu

2016

Struct Design Tall Spec Build

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Structural steel special moment frames are designed to resist earthquakes with substantial inelastic energy dissipation. The ductile beam‐to‐column connections become more popular over these years by dissipating the earthquake input energy at beam ends. The paper provides a comprehensive study of a high‐strength slotted bolted connection (SBC). Slotted holes instead of round holes are used for the connection such that frictional sliding could be developed. Experimentally, a standard bolt–weld connection as well as three similar slotted bolted connections were designed and tested. The load‐carrying capacities, the ductile deformations, the energy dissipation capacities, and the hysteretic characteristics of the specimens were presented. The overall performance of the steel connections by replacing the circular holes with slotted holes is evaluated, and the design recommendations of the flange gusset plate with slotted holes are provided. Numerically, the nonlinear SBC behavior was simulated and calibrated against the experimental results. The SBC effectiveness as well as the parametrical influences have been presented in details. Results show that the friction slippage behaviors of the specimens with slotted holes provide better ductility, higher plastic deformation capacity, and increased load‐resisting capacities near the ultimate strength.

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“…Mualla and Belev [11] proposed a friction damping device and carried out tests for assessing the friction pad material. Habib Saeed Monir and Keyvan Zeynali [12] introduced and tested a modified friction damper (MFD) which is similar to pall friction damper however it is applied in the diagonal bracing. Recently Mirtaheri et al [13] proposed an innovative type of frictional damper called cylindrical friction damper (CFD).…”

Section: Introductionmentioning

confidence: 99%