||In the analysis and design of mat foundation , there are two type methods : finite-element structural analysis model and simplified structural analysis model . But the simplified structural analysis model does not pass through a detailed self-criticism process . So this research hope to bring up some suggest about analyze and design the mat foundation by using simplified structural analysis model . This research is to analyze the behavior of mat foundation under loading by the method of finite-element structural analysis model and simplified structural analysis model , which regard the soil as the Winkler type of subgrade reaction springs that do not affect one another .|
In the simplified structural analysis model , "Yield Line Theory" is used to distribute the spring stiffness of each beam . Therefore , beams can be imagined to be on some springs with different elastic modulus .
Base on some numerical comparisons with the results by finite-element structural analysis model and simplified structural analysis model , we decide the numbers , stiffness and position of springs in each beam . In the meanwhile , we bring up a method to analyze and design the slab of mat foundation .
2. ACI Committee 436 Report(1966), "Suggested Design Procedures for Combined Footing and Mat" ,ACI Journal Oct.
4. Terzaghi,K. (1955), "Evaluation of coefficients of subgrade reaction", Geotechnigue, vol 5, no 4, pp297-326
5. Vesic,A.B. (1961), "Bending of beams resting on isotropic elastic solid ", Journal of the engineering mechanics division-ASCE, vol 87, iss 2, pp35-53
6. Bowles,J.E. (1992), Foundation analysis and design, 3rd Ed, McGraw-Hill Book Co., Inc, New work,N.Y.
7. Habibullah, A. (1991), SAFE - Slab Analysis by the Finite Element Method, Computers and Structures, Inc., Berkeley, California.
8. Zienkiewicz, O.C. "The Finite Element Method in Engineering Science," McGraw-Hill, London, 1971.
9. Zienkiewicz, O.C., Cheung, Y.K. "The Finite Element Method for Analysis of Elastic, Isotropic and Orthotropic Slabs" Proceeding of the Institute of Civil Engineering, 1964.
10. Hughes, T.J.R.,Tezduyar,T.E. "Finite Element Based upon Mindlin Plate Theory with Particular Reference to the Four Node Bilinear Isoparametric Element," Stanford University, Palo Alto, California, September 1980.