臺灣博碩士論文加值系統

在工程實務上，為簡化土層的分析模式，在靜態土壤結構互制問題上，常以Winkler彈簧來模擬，而其彈簧常數亦即所謂的地盤反力係數；動態方面，由於較為複雜，目前大都仍假設土層為均質或彈性半空間來處理。至於層狀土壤之模擬，至今仍缺乏有效的簡化模式，更談不上簡化模式中動態彈簧、阻尼係數的決定。故此，本文嘗試利用集合參數法，將每一層次土壤質量集中在頂部或底部，各層質量並以剪力彈簧及阻尼盤連結，將層狀土壤予以簡化，冀望能發展出符合工程需要且簡單合理的分析模式，以處理動態土壤結構互制問題。 研究結果顯示，利用集合參數法來處理動態土壤結構互制問題時，其結果與利用有限元素法所獲得之結果比較，無論在地下土層部份，或是地上結構部份的反應，均有非常好的結果。同時，此簡化模式更可將原有系統之頻率內涵完整的呈現出來。

To simplify the analytical model of soil, we usually use the Winkler''s spring model for static soil-structure interaction problem for engineering practice. As for dynamic problem, it is so complicated that the soil is assumed to be a homogeneous elastic half space. So far, there is no effective simple model to simulate the multi-layer system. Thus, this study uses the lumped parameter method to simulate the soil mass on the top and bottom of each layer and connect them by the shear springs and dashpots to simplify the soil layers. It is expected that a simple as well as rational model be developed to dealwith the practical dynamic soil-structure interaction problem. The results show that very good results may be obtained by the lumped parameter method compared with finite element method. Meanwhile, the simplified model developed can also catch completely the characteristics of the frequency content of the system.