Experimental study on precast concrete moment‐resisting frame system with sector lead viscoelastic dampers

Wu, Chuanxi; Li, Dingbin; Deng, Xuesong; Yang, Cheng; Xu, Xin

doi:10.1002/stc.2746

Cited by 21 publications

(3 citation statements)

References 27 publications

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“…With the increase of the strain amplitude, the energy dissipation coefcient and the equivalent viscous damping ratio increased and then decreased; with the increase of rubber's shear modulus, the initial stifness, postyield stifness, and equivalent stifness increased, but the energy dissipation coefcient and equivalent viscous damping ratio decreased, and the loading frequency had a small efect on the performance of this damper. Wu et al [14,15] studied the performance of a seismic device with the joint SLVD and analyzed the efects of diferent strain amplitudes, loading frequencies, and shear modulus of the rubber on the performance of the damper. Zhu et al [16] designed and analyzed the frame structure equipped with the SLVD from the view of stifness, and the theoretical method for the design of dampers was given.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of a Novel Right-Angle Viscoelastic Damper (RVD) Using Polyurethane Damping Materials

Zhu

Zhou

et al. 2023

Structural Control and Health Monitoring

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Excessive plastic deformation may occur at the beam-column joints under seismic action and lead to connection failure, increasing the possibility of collapse of the entire frame structure. In order to improve the seismic performance of assembled steel structure joints, a right-angle viscoelastic joint damper with polyurethane as the core energy dissipation material is proposed in this paper. First, the temperature scanning tests of polyurethane materials were carried out based on the dynamic mechanical analysis method. Second, the dynamic mechanical test and numerical simulation analysis of the designed right-angle viscoelastic damper were performed to reveal the dynamic energy dissipation characteristics of the right-angle damper. Finally, the dynamic time-history damping analysis was performed on the steel frame structure equipped with RVDs. The results show that the TA value of polyurethane material reached its peak at 2.0 Hz, which is the ideal frequency for the material’s damping ability. The right-angle damper made of polyurethane material has a softening nonlinear characteristic, and the peak value of the loss factor was obtained at 2.0 Hz, which is consistent with the results of the dynamic performance of the polyurethane material. The numerical simulation results demonstrate that stress on the steel plates and viscoelastic layers is reasonable. When the excitation level did not exceed 9 mm displacement amplitude, the energy input to the damper was dissipated by polyurethane, and the steel plates never showed plastic deformation. The time-history analysis of the steel structure shows that the dampers designed in this paper have a good control effect on the interstory displacement, acceleration, and interstory shear force of the structure. The research results lay the necessary foundation for the engineering application of polyurethane materials in the field of beam-column joints vibration damping.

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Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of a Novel Right-Angle Viscoelastic Damper (RVD) Using Polyurethane Damping Materials

Zhu

Zhou

et al. 2023

Structural Control and Health Monitoring

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“…Aghlara [24] introduced a bar-fuse damper (BFD) and studied its application to enhance the seismic performance of precast concrete (PC) frame structures. Wu [25] proposed the use of sectorlead viscoelastic dampers (SLVDs) to repair damaged RC frames. Zhang [26] investigated the use of sector-lead viscoelastic dampers (SLVDs) to improve the seismic performance of RC frames.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Pole Repulsive Damper (Mprd): A Promising Solution for Seismic Protection of Structures

Kasaram,

Vijayakumar,

Cruze

et al. 2023

ACAE

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Owing to its high energy dissipation characteristics, the passive damper is an effective means of mitigating natural hazards for structures. In this study, a novel magnetic pole repulsive damper (MPRD), designed for reducing structural responses during natural hazards such as earthquakes, was developed and its performance was validated. The MPRD is an effective solution for seismic protection that works on the principle of magnetic repulsion and has a higher energy dissipation capacity than conventional dampers. The MPRD was fabricated using mild steel, neodymium magnets, and a set of helical springs. Two scaled reinforced concrete frames were tested using a 50 kN loading actuator. One frame was equipped with the MPRD, while the other served as a conventional frame for comparison. The frame with the MPRD showed reduced displacements. Compared with the conventional frame, that with the MPRD exhibited an increase in load of 40 % and an increase in energy dissipation of 6,44 %. Further, an increase in lateral stiffness, a 19,23 % increase in stiffness degradation, and changes in crack patterns were observed in the frame with MPRD compared to the conventional frame. The study's success in validating the MPRD performance in reducing structural responses in moderate to high seismicity regions makes it a promising solution for building seismic protection.

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“…Over the years, researchers have examined various coupling beam dampers with different energy dissipation principles, such as friction dampers, [3][4][5][6][7][8][9] viscoelastic dampers, [10][11][12] and metal dampers. [13][14][15] Composite dampers with multiple energy dissipation principles have also been proposed and developed, for example, metal and viscoelastic composite dampers, [16][17][18] steel tube and lead core composite dampers, [19][20][21][22] lead and rubber composite dampers, [23][24][25] etc. [26][27][28][29][30] Most dampers efficiently dissipate earthquake energy and control the seismic response of shear wall structures.…”

Section: Introductionmentioning

confidence: 99%

Development and investigation of an innovative shape memory alloy cable‐controlled self‐centering viscoelastic coupling beam damper for seismic mitigation in coupled shear wall structures

Qian

Fan

Shi

et al. 2022

Earthq Engng Struct Dyn

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To improve the seismic performance of coupled shear walls in high‐rise buildings and to eliminate the problems of large residual deformation and relatively small initial stiffness and damping properties of the traditional viscoelastic coupling beam damper (TVCBD), an innovative shape memory alloy (SMA)‐cable‐controlled self‐centering viscoelastic coupling beam damper (SVCBD) with energy dissipation and self‐centering capabilities was designed and investigated in this study. The construction form and operating principles of the SVCBD were proposed, relevant material performance tests of the cables were performed, and good results were obtained. Finally, the contribution of the SVCBD to seismic mitigation of a 10‐story reinforced concrete coupled shear wall structure was verified by seismic time‐history analyses. The results indicated that compared with TVCBD, SVCBD possesses fuller hysteretic curves, showing stronger energy dissipation capacity, higher initial stiffness, and much smaller residual deformation. The initial strain and cross‐sectional area of the SMA cables and the shear area of the viscoelastic plates affect the energy dissipation and self‐centering performance of SVCBD significantly. The seismic response and post‐earthquake residual deformation of the coupled shear wall structure and the plastic damage of the main components can be effectively controlled by utilizing the proposed SVCBD.

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Experimental study on precast concrete moment‐resisting frame system with sector lead viscoelastic dampers

Cited by 21 publications

References 27 publications

Dynamic Characteristics of a Novel Right-Angle Viscoelastic Damper (RVD) Using Polyurethane Damping Materials

Dynamic Characteristics of a Novel Right-Angle Viscoelastic Damper (RVD) Using Polyurethane Damping Materials

Magnetic Pole Repulsive Damper (Mprd): A Promising Solution for Seismic Protection of Structures

Development and investigation of an innovative shape memory alloy cable‐controlled self‐centering viscoelastic coupling beam damper for seismic mitigation in coupled shear wall structures

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