| Summary: | 碩士 === 國立成功大學 === 土木工程學系碩博士班 === 94 === This paper use ABAQUS software to analyse the Double-Skin Concrete Filled Tubes (DS-CFT) that subject to axial compression and bending moment, then compare the analysis results with experimental data of national earthquake center. By the way, we can find the Fl, K3, and K4 of a DS-DFT subject to such loads, understand the benefit that concrete can produce in DS-CFT so, and calculate the experience formulas used for material parameters.
By the result analysing, we can find that the specimen under pure bending can’t let the concrete keep its compressive resistibility because of lacking the axial compression, therefore the strength of such specimen is less than others, but DS-CFT can still offer a certain Fl that is much stronger than CFT.
Besides, we find the experience formula and K2 of CFT are not suitable for DS-CFT specimens, K2 value of CFT will lead to a strain that is too large. so this paper repeated trying for many times, induct new values of K2, and find out the suitable material parameters and experience formulas again.
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