YANG Jinping,SUN Kaixin,LI Peizhen,et al.Efficiency Analysis of Metal Dampers Considering Soil⁃structure Interaction[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(03):494-501.
YANG Jinping,SUN Kaixin,LI Peizhen,et al.Efficiency Analysis of Metal Dampers Considering Soil⁃structure Interaction[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(03):494-501.DOI:
Efficiency Analysis of Metal Dampers Considering Soil⁃structure Interaction
In this study, a shaking table model test was performed on the stiffening damper system with opening holes considering the soil-structure interaction (SSI) to investigate the efficiency of metal dampers. The layered shear box was designed to simulate the soil boundary, with a mixture of sawdust and sand serving as the foundation soil. A12-storey reinforced concrete frame structure was constructed to simulate the superstructure. The foundation was a 3×3 pile group. Four shaking table model tests were carried out, including the 1:6 scale high-rise soil-pile-structure dynamic interaction system, the same system equipped with metal dampers, the frame structure under a fixed-base condition, and the frame structure equipped with metal dampers under a fixed-base condition. The differences between the pure frame and the energy dissipation and shock absorption structures are compared with each other and are analyzed in terms of their dynamic characteristics and seismic responses. By calculating the damping rate, the influence law of SSI effect on the damping effect of the energy dissipation and damping structure is analyzed. The results show that under identical earthquake loading, the frequency attenuation of the energy dissipation structure is reduced to 1/3~1/2 of that of the pure frame, and the damping ratio is increased to about 1/2 of that of the pure frame. The damage degree of the structure is greatly mitigated, and the dampers have a significant damping effect. Although the damping efficiency of metal dampers in SSI system decreases, the damping effect of soil-structure interaction is strengthened. Generally, the damping rate of the SSI system remains higher than that of the fixed-base condition.
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