• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
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Volume 31 Issue 2
Apr.  2018
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Article Contents
XIONG Haibei, CHEN Lin, WU Ying, JIA Guocheng. Simplified Calculation Research on Effects of Dynamic Amplification on Soft-Upper-Rigid-Down Hybrid Structures[J]. Journal of Southwest Jiaotong University, 2018, 53(2): 219-225. doi: 10.3969/j.issn.0258-2724.2018.02.001
Citation: XIONG Haibei, CHEN Lin, WU Ying, JIA Guocheng. Simplified Calculation Research on Effects of Dynamic Amplification on Soft-Upper-Rigid-Down Hybrid Structures[J]. Journal of Southwest Jiaotong University, 2018, 53(2): 219-225. doi: 10.3969/j.issn.0258-2724.2018.02.001

Simplified Calculation Research on Effects of Dynamic Amplification on Soft-Upper-Rigid-Down Hybrid Structures

doi: 10.3969/j.issn.0258-2724.2018.02.001
  • Received Date: 31 May 2015
  • Publish Date: 25 Apr 2018
  • Soft-upper-rigid-down hybrid structures are more susceptible to the "whipping effect". Considering the effects of stiffness and mass ratios on the dynamic characteristics of structures, a simplified calculation method which can be used in engineering to determine the effects of dynamic amplification on a soft-upper-rigid-down hybrid structure is given by proposing the concept of a stiffness mass integrated ratio and assuming that the damping ratios of the superstructure and substructure are equal. Analysis reveals that the results of the simplified calculation method correlate well with one set of published shaking table test data and the mode-superposition method. For light wood-concrete structures, which are composed of two layers ("1+1" system), three layers ("1+2" system) or six layers ("2+4" system), the results of the simplified calculation method are in good agreement with the mode-superposition method with an error lower than 20%, which verifies the validity and reliability of the simplified calculation method. It is proposed that the simplified calculation method can be used to calculate the effect of dynamic amplification of soft-upper-rigid-down hybrid structures when the stiffness ratio of the structure is not less than 7.

     

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