筏式基礎之分析

Abstract

本文係以彈性基礎之模式將土壤模擬成互不相影響的彈簧來分析筏式 基礎受載重後的行為，在推導的過程中以破壞線理論來分配每根地樑受土 壤反力的範圍，此時樑會彷彿置在一些彈性模數不一的彈簧上，於是可以 樑在彈性基礎的方式求解，並以位移法求得樑的勁度矩陣。最後以同樣的 幾何模式將每根樑分別分成2 elements，4 elements，8elem- ents進入 ANSYS50程式分析，並與本文程式所得之結果比較。 This research is to analyze the behavior of mat foundation under loading by the method of elastic foundation model which regards the soil as springs that do not affect one another . In the process of derivation , " Yield Line Theory " is used to distribute the soil reaction force of each beam . Therefore, beams can be imagined to be on some springs with different elastic modulus . Then the behavior of beams can be solved by means of " Beams on the Elastic Foundation " and stiffness matrix of beams can be solved by " deformation method " . At last , divide each beam into 2 elements , 4 elements and 8 elements in the same geometry model , then to analyze by the program " ANSYS50 " and compare the results with the program developed in the research .