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RISS 인기검색어
- 검색키워드
- 저자 : A. Megnounif (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Strength buckling predictions of cold-formed steel built-up columns
Megnounif, A.,Djafour, M.,Belarbi, A.,Kerdal, D. Techno-Press 2008 Structural Engineering and Mechanics, An Int'l Jou Vol.28 No.4
The aim of this paper is to propose a design procedure for predicting the buckling strength of built-up, cold-formed steel columns based on the two well known methods; the effective width method and the Direct Strength Method. Several design approaches, based on different elastic buckling solutions, were considered in this investigation. Traditional hand methods, without interaction effects between the different modes, and a new numerical spline finite strip method were used to predict the buckling stresses. All of the proposed methods were compared with experimental data on plain and lipped, built-up columns. Results have shown that the effective width approaches are more accurate than the Direct Strength Method. However, both methods can be investigated using more experimental data to assess a practical design method for built-up columns.
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A numerical method for buckling analysis of built-up columns with stay plates
Djafour, M.,Megnounif, A.,Kerdal, D.,Belarbi, A. Techno-Press 2007 Structural Engineering and Mechanics, An Int'l Jou Vol.26 No.4
A new numerical model based on the spline finite strip method is presented here for the analysis of buckling of built-up columns with and without end stay plates. The channels are modelled with spline finite strips while the connecting elements are represented by a 3D beam finite element, for which the stiffness matrix is modified in order to ensure complete compatibility with the strips. This numerical model has the advantage to give all possible failure modes of built-up columns for different boundary conditions. The end stay plates are also taken into account in this method. To validate the model a comparative study was carried out. First, a general procedure was chosen and adopted. For each numerical analysis, the lowest buckling loads and modes were calculated. The basic or "pure" buckling modes were identified and their critical loads were compared with solutions obtained using analytical methods and/or other numerical methods. The results showed that the proposed numerical model can be used in practice to study the elastic buckling of built-up columns. This model is considered accurate and efficient for the local buckling of short columns and global buckling for slender columns.
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Strength buckling predictions of cold-formed steel built-up columns
A. Belarbi,A. Megnounif,M. Djafour,D. Kerdal 국제구조공학회 2008 Structural Engineering and Mechanics, An Int'l Jou Vol.28 No.4
The aim of this paper is to propose a design procedure for predicting the buckling strength of built-up, cold-formed steel columns based on the two well known methods; the effective width method and the Direct Strength Method. Several design approaches, based on different elastic buckling solutions, were considered in this investigation. Traditional hand methods, without interaction effects between the different modes, and a new numerical spline finite strip method were used to predict the buckling stresses. All of the proposed methods were compared with experimental data on plain and lipped, built-up columns. Results have shown that the effective width approaches are more accurate than the Direct Strength Method. However, both methods can be investigated using more experimental data to assess a practical design method for built-up columns.
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