Joint effect of steel frame equivalent geometrical imperfections

• Autorzy: Machowski, A. J. , Tylek, I. A.
• Języki publikacji: EN

Abstrakty

EN

In first order critique of hitherto existing conceptions of taking into consideration equivalent imperfections of initial tilt and initial bow joint effect on carrying capacity of steel frames is presented. Statistically based models of random equivalent imperfections assumed in the paper were obtained utilizing authors' research. Combination of column initial tilts random sequence and column random initial bows multiplied by random binary sequence is considered. Conception mentioned above is applied to analyse carrying capacity of 2-bay 5-story example steel frame. Numerical simulations of considered frame carrying capacity are conducted. It enables to evaluate influence of taking into consideration column random initial bows aside from column random initial tilts on steel frame carrying capacity. Results obtained out of conducted analyses shows that influence of column random initial bows on frame limit strength value associated with limit point on frame equilibrium path is slight. This influence turns out significant in case of frame ultimate load carrying capacity analysis according to the most efforted cross-sections criterion.

Słowa kluczowe

PL

wpływ połączenia; rama stalowa; imperfekcja geometryczna; wychylenie początkowe; ugięcie początkowe

EN

joint effect; steel frame; geometrical imperfection; initial tilt; initial bow

• Czasopismo: Zeszyty Naukowe Politechniki Rzeszowskiej. Budownictwo i Inżynieria Środowiska
• Rocznik: 2009
• Tom: z. 52 [264]
• Strony: 115-124
• Opis fizyczny: Bibliogr. 17 poz., il.

Twórcy

autor

Machowski, A. J.

autor

Tylek, I. A.

• Cracow University of Technology, Cracow, Poland

Bibliografia

• [1] Beaulieu D., Adams P.F., Significance of structural out-of-plumb forces and recommendations for design. Canadian Journal of Civil Engineering. Vol. 7/1980.
• [2] De Luca A. & Mele E., Analysis of steel frames in the light of Eurocode 3 and new research results. In: Plastic hinge based methods for advanced analysis and design of steel frames. SSRC, Lehigh Univ. Bethlehem. PA USA, 1993.
• [3] ECCS. European specifications for steel structures. 1-st ed. 1974.
• [4] Fukumoto Y., Itoh Y., Multiple buckling curves based on experimental data. Construction Metállique, No.3/1984 (in French).
• [5] Gwóźdż M., The problems of random resistance of metal bars. Cracow University of Technology, Publ. No.4, Cracow, 1997 (in Polish).
• [6] Lindner J., Gietzelt R., Imperfektionsannahmen für Stützenshiefstellungen. Stahlbau, No. 4/1984.
• [7] Machowski A., Problems of limit states and reliability of steel multistory building frames, Cracow University of Technology, Monograph No. 262, Cracow, 1999 (in Polish).
• [8] Machowski A., Initial random out-of-plumbs of steel frame columns. Archives of Civil Engineering, XLVIII, 2.
• [9] Machowski A., Tylek I., The equivalent imperfection concepts of steel frame. L Konferencja KILiW PAN i KN PZiTB Krynica 2004. Tom II (in Polish).
• [10] Machowski A., Tylek I., Random equivalent initial bow imperfection of compressed steel bar. Quality and reliability in building industry. IV International Scientific Conference. Levoča, 2006.
• [11] Machowski A., Tylek I., Conceptions of equivalent imperfections in analysis of steel frames. The International Journal of Advanced Steel Construction, Vol.4, No.1 (2008).
• [12] Murzewski J., Reliability of engineering structures. Arkady, Warsaw, 1989 (in Polish).
• [13] Papoulis A., Probability, random variables and stochastic processes. McGraw-Hill Book Company, New York, 1965.
• [14] PN-B-03200: 1990: Steel structures. Analysis and design (in Polish).
• [15] PN-EN 1993-1-1: 2006. Eurokod 3: Design of steel structures. Part 1.1. General rules and rules for buildings (in Polish).
• [16] Rondal J., Maquoi R., The Ayrton-Perry formulation for buckling of metallic bars. Construction Metállique, No. 4/1979 (in French).
• [17] Tylek I., Equivalent geometrical imperfections of multistory steel building frames. Doctoral Thesis. Cracow University of Technology, Cracow, 2007 (in Polish).