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RISS 인기검색어
- 검색키워드
- 저자 : C.J. Gantes (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Comparison of alternative algorithms for buckling analysis of slender steel structures
C.A. Dimopoulos,C.J. Gantes 국제구조공학회 2012 Structural Engineering and Mechanics, An Int'l Jou Vol.44 No.2
Objective of this paper is to compare linear buckling analysis formulations, available in commercial finite element programs. Modern steel design codes, including Eurocode 3, make abundant use of linear buckling loads for calculation of slenderness, and of linear buckling modes, used as shapes of imperfections for nonlinear analyses. Experience has shown that the buckling mode shapes and the magnitude of buckling loads may differ, sometimes significantly, from one algorithm to another. Thus, three characteristic examples have been used in order to assess the linear buckling formulations available in the finite element programs ADINA and ABAQUS. Useful conclusions are drawn for selecting the appropriate algorithm and the proper reference load in order to obtain either the classical linear buckling load or a good approximation of the actual geometrically nonlinear buckling load.
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Comparison of alternative algorithms for buckling analysis of slender steel structures
Dimopoulos, C.A.,Gantes, C.J. Techno-Press 2012 Structural Engineering and Mechanics, An Int'l Jou Vol.44 No.2
Objective of this paper is to compare linear buckling analysis formulations, available in commercial finite element programs. Modern steel design codes, including Eurocode 3, make abundant use of linear buckling loads for calculation of slenderness, and of linear buckling modes, used as shapes of imperfections for nonlinear analyses. Experience has shown that the buckling mode shapes and the magnitude of buckling loads may differ, sometimes significantly, from one algorithm to another. Thus, three characteristic examples have been used in order to assess the linear buckling formulations available in the finite element programs ADINA and ABAQUS. Useful conclusions are drawn for selecting the appropriate algorithm and the proper reference load in order to obtain either the classical linear buckling load or a good approximation of the actual geometrically nonlinear buckling load.
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Bending and shear stiffness optimization for rigid and braced multi-story steel frames
I. Vayas,C.C. Pouangare,C.J. Gantes,A. Spiliopoulos 국제구조공학회 2001 Steel and Composite Structures, An International J Vol.1 No.4
The response of multi-story building structures to lateral loads, mainly due to earthquake and wind, is investigated for preliminary design purposes. Emphasis is placed on structural systems consisting of rigid and braced steel frames. An attempt to gain a qualitative understanding of the influence of bending and shear stiffness distribution on the deformations of such structures is made. This is achieved by modeling the structure with a stiffness equivalent Timoshenko beam. It is observed that the conventional stiffness distribution, dictated by strength constraints, may not be the best to satisfy deflection criteria. This is particularly the case for slender structural systems with prevailing bending deformations, such as flexible braced frames. This suggests that a new approach to the design of such frames may be appropriate when serviceability governs. A pertinent strategy for preliminary design purposes is proposed.
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