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RISS 인기검색어
- 검색키워드
- 저자 : Jafar Ghalejoughi (검색결과 1 건)
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Experimental and Numerical Study of a Tube in Tube Force Limiting Device
Jafar Ghalejoughi,Mohammad Reza Sheidaii,Saeed Tariverdilo 한국강구조학회 2020 International Journal of Steel Structures Vol.20 No.4
The buckling and sudden capacity loss of the compression member can be prevented using a proposed tube in tube force limiting device (TTFLD). In this way, the brittle post-buckling behavior of the compression member can be converted into an elasto-plastic behavior. The TTFLD consists of two tubes with unequal diameter, one of which is placed into the other tube. The outer tube operates as a casing for the inner compression tube and the fl exural stiff ness of the outer tube restrains the buckling of the inner tube. The present study has experimentally investigated and evaluated a number of experimental specimens. Next, numerical analysis of these specimens has been done using fi nite element software. Further, the behavior of the tube in tube force limiting device have been investigated under important parameters such as the gap between the inner and outer tubes (gap), the inner tube or main member slenderness ratio (λ), and the ratio of outer tube length to inner tube length ( L 2∕L 1) , by extending the numerical studies to further examples. Using this TTFLD is an eff ective, simple and economical method to prevent the buckling of compression member and can lead to a favorable increase in the bearing and deformability capacity of the compression members with diff erent values of slenderness ratio. The compressive strength of the member will increase signifi cantly, if the gap size is less than about 43% of the inner tube’s gyration radius, and the length ratio is greater than about 55%.
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