西南交通大学学报2018，Vol.53Issue(2)：219-225,7.DOI:10.3969/j.issn.0258-2724.2018.02.001
上柔下刚混合结构动力放大效应简化计算研究
Simplified Calculation Research on Effects of Dynamic Amplification on Soft-Upper-Rigid-Down Hybrid Structures
摘要
Abstract
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.关键词
混合结构/轻木-混凝土结构/上柔下刚/动力放大效应/刚度质量综合比Key words
hybrid structure/light wood-concrete structure/soft-upper-rigid-down/effect of dynamic amplification/stiffness mass integrated ratio分类
建筑与水利引用本文复制引用
熊海贝,陈琳,吴颖,贾国成..上柔下刚混合结构动力放大效应简化计算研究[J].西南交通大学学报,2018,53(2):219-225,7.基金项目
国家自然科学基金资助项目(50321803) （50321803）
地震工程国际合作联合实验室合作研究项目(TMGFXK-2015-002-2) （TMGFXK-2015-002-2）
国家科技支撑计划资助项目(2014BAL05B01) （2014BAL05B01）
