Abstract:In order to investigate the seismic reduction effect of viscous dampers in structures, the shaking table tests of a steel frame energy dissipated structure on rigid and pile group foundations were conducted. The similarity relationship between the original structure and the experimental model was obtained according to dimensional analysis. The soil used in the test was silty clay and a laminar shear container was fabricated to reduce the boundary effect. The super-structure was a five storey steel frame model, viscous dampers were used as the energy dissipaters. The data of structural dynamic characteristics, floor accelerations and displacements with and without viscous dampers under seismic excitations for different base conditions were obtained by the shaking table tests. For pile group supported model, the strain of plie and the contact pressure of soil-pile interface are aslo measured. The results indicate that: for structures without dampers, the damping ratio of the system have a considerable increase due to SSI effect; however, for structures with dampers, the SSI effect have little influence on the damping ratio of the system. The floor accelerations have a reduction considering the SSI effect and the extend of reduction increases with the increase of input earthquake intensity. The efficiency of the dampers for pile group foundaitons have a great decline compared with that of fixed foundations. The dampers can not only reduce the response of the super structure, but also the response of the piles.
赵学斐,王曙光,王海,杜东升,刘伟庆. 考虑土-结相互作用的粘滞阻尼器减震结构振动台试验研究[J]. 振动与冲击, 2017, 36(13): 146-154.
ZHAO Xue-fei, WANG Shu-guang, Wang Hai, Du Dong-Sheng, LIU Wei-qing. Shaking table tests on structures with viscous dampers considering SSI effect. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(13): 146-154.
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