Shaking Table Tests of Suspended Structures Equipped with Viscous Dampers

Abstract

In this study, a series of shaking table tests of a ten storey concrete suspended structure equipped with viscous dampers were carried out to evaluate the dynamic responses and vibration damping performance of suspended structures. The effects of link types between the primary structure and suspended floors and different seismic excitations on the response of suspended structure models was verified. The responses include the damping ratio, the frequency, maximum relative displacements, accelerations and maximum strains of the suspended structures. Test results showed that the damping ratio and the frequency of suspended structures installed with dampers (called damping suspended structure) are adjusted compared with a conventional suspended structure with rigid-bar links (conventional suspended structure). Maximum relative displacements of the primary structure of the damping suspended structure were distinctly smaller than those of the conventional suspended structure. However, the maximum relative displacement between the primary structure and the suspended floors of the damping suspended structure was significantly larger than that of the conventional structure, indicating that the swing of the suspended floor can help dissipate seismic energy. The peak acceleration and acceleration amplification factors of the damping suspended structure were less than the conventional suspended structure. Moreover, the peak acceleration response of the damping suspended structure was slightly behind the conventional suspended structure. The damping suspended structure certainly had a considerable and stable reduction for strain response, and the maximum strain response was decreased by 42.3%–72.7% for the damping suspended structure compared with the conventional suspended structure.

Effect of Acceleration on Wrap Faced Reinforced Soil Retaining Wall on Soft Clay by Performing Shaking Table Test

“…The dynamic parameters for scaled model of a single layer soil are restricted with base-rock which has been compared numerically with the proposed laminar soil container to provide a good agreement [16]. Many researchers [17][18][19] performed shaking table test, to study the seismic responses of underground structures embedded in soft soil. Moreover, it is necessary to consider the influence of pore pressure in soft soil sites.…”

Seismic Mitigation Efficiency Study of the Coupling Beam Damper in the Shear Wall Structure

“…The principle and design method of the structure with damper are studied by many scholars. According to the difference of the structural systems, the different dampers are used in the structure including soft steel dampers, viscoelastic dampers and friction pendulum dampers [1][2][3][4]. To improve the energy-dissipating capacity and deflection of the damper, the optimal design and test study of the damper were carried out [1], and the novel damper was also developed [2].…”

“…To improve the energy-dissipating capacity and deflection of the damper, the optimal design and test study of the damper were carried out [1], and the novel damper was also developed [2]. Meanwhile, the effect of the viscoelastic damper on the structural dynamic response was studied [3], and the shaking table test of the structure with damper was developed to analyse the seismic mitigation efficiency of the damper [4]. For the high-rise structure with the outrigger, the viscoelastic damper was installed in the outrigger floor, and the earthquake response of structure had been effectively decreased because of the damper action [5][6].…”

Seismic Response and Vibration Reduction Analysis of Suspended Structure under Wave Passage Excitation

“…According to the engineering practice of the existing suspended building structure, combined with the classification of the suspension structure by Schuler [17], the suspended building structure is divided into two categories: the core-tube suspended building structure [18][19][20] and the megaframe suspended building structure [21,22]. e megaframe suspended structure has attracted much attention due to the flexibility of its architectural function layout and design.…”