半无限地基上框架结构动力性态研究
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摘要
将半无限地基分为远域和近域，分别用超参映射动力无穷元和普通有限元模拟，提出一种上部结构与地基之间的耦合单元，从而建立了该系统的数值分析模型。基于该模型，分析研究了地基远域、地基与结构的弹模比、结构高宽比、以及输入方式对该系统动力特性的影响。计算结果表明：这种影响是明显的。
In this paper, the semi infinite foundation is divided into far and near domains, and they are simulated by the super parameter mapping dynamic infinite element and the ordinary finite element respectively. A coupling element between the superstructure and ground is also suggested where by a mathematical model of numerical analysis for that system is established, on the basis of which the effect of the foundation far domain, the elastic modulus ratio between the height and span of the structure and input patterns upon the dynamic properties of the system is analysed and studied. Accordingly, the results show that the effect is apparent.
In this paper, the semi infinite foundation is divided into far and near domains, and they are simulated by the super parameter mapping dynamic infinite element and the ordinary finite element respectively. A coupling element between the superstructure and ground is also suggested where by a mathematical model of numerical analysis for that system is established, on the basis of which the effect of the foundation far domain, the elastic modulus ratio between the height and span of the structure and input patterns upon the dynamic properties of the system is analysed and studied. Accordingly, the results show that the effect is apparent.
引文
1赵崇斌．拱坝地基无穷域模拟与地震波输入研究：［博士学位论文］．北京：清华大学建筑工程系，19872王文亮，杜作润．结构振动与动态子结构法．上海：复旦大学出版社，1985
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