| 半无限大弹性地基上变截面筒中筒高层建筑结构的自由振动 |
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| 引用本文： | 龚耀清,包世华.半无限大弹性地基上变截面筒中筒高层建筑结构的自由振动[J].工程力学,1999,16(3):7-14. |
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| 作者姓名： | 龚耀清 包世华 |
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| 作者单位： | 清华大学土木工程系!北京，100084 |
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| 基金项目： | 国家自然科学基金!59878022 |
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| 摘 要： | 本文以变截面筒中筒结构为例建立了地基、基础与上部结构共同工作的自由振动模型；导出了计算储存在半无限弹性地基中弹性变形能所需的各种地基刚度。通过对广东国际大厦所采用的筒中筒结构的自由振动分析，得出了一些令人满意的比较切合实际的结论。
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| 关 键 词： | 高层建筑结构 结构动力学 能量原理 半解析法 上部结构与地基基础的共同工作 |
FREE VIBRATION OF TALL BUILDING TUBE-IN-TUBE STRUCTURES WITH VARIABLE CROSS-SECTION ON SEMIINFINITE ELASTIC SUBGRADE |
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| GONG Yao-qing, BAO Shi-hua, LONG Yu-qiu.FREE VIBRATION OF TALL BUILDING TUBE-IN-TUBE STRUCTURES WITH VARIABLE CROSS-SECTION ON SEMIINFINITE ELASTIC SUBGRADE[J].Engineering Mechanics,1999,16(3):7-14. |
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| Authors: | GONG Yao-qing BAO Shi-hua LONG Yu-qiu |
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| Abstract: | In the paper a new semi-analytical method for three-dimensional free vibration analysis of interactions between semi-infinite elastic subgrade and foundation and superstructure of tall buildings is developed. The various subgrade stiffness parameters for evaluating elastic strain energy stored in subgrade are inferred by using the principle of energy equivalency. This method is applied to analyze the tube-in-tube reinforced concrete structure adopted by Guangdong Guoji Building. The numerical results obtained are compared with that of model test. |
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| Keywords: | tall buildings structUre dynamics of structUres energy principle semi-analyticalmethod interactions betWeen superstructUre and foundation and subgrade |
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