A simplified method of plastic hinge analysis of semi-rigid sway frames

• Autorzy: Branicki C. , Giżejowski M. , Barszcz A. , Uzoegbo H.
• Konferencja: VIII Konferencja Naukowa pt. Połączenia i węzły w konstrukcjach metalowych, Olsztyn - Łańsk, 16-19 października 2003
• Języki publikacji: EN

Abstrakty

EN

The term "simplified second order plastic hinge analysis" describes a modified version of the first order plastic hinge analysis, in which the P-Delta effect associated with geometrical non-linearity of analysed sway planar frames is accounted for. The weakening effect of the system static response can be taken into account either by increasing the horizontal loads or by reducing the load carrying capacity of its members. In the first method, the horizontal nodal loads are being systematically increased by a quotient that depends on the degradation ratio of the system second order stiffness matrix. The quotient is recalculated at each incremental step on the basis of stability analysis of the "deteriorated" frame. An advantage of the developed method is that no iterations are required at each incremental step of analysis, so that the simplified second order analysis is characterised by computational complexity similar to that of the conventional first-order analysis. An illustrative example is presented and the results compared with the conventional first order plastic hinge analysis and with second-order plastic hinge analyses.

Słowa kluczowe

EN

steel frame; semi-rigid joint; second-order analysis; plastic hinge

PL

przegub plastyczny; rama przechyłowa; węzeł podatny; analiza II rzędu; metoda przegubów plastycznych

• Wydawca: Polska Izba Konstrukcji Stalowych
• Czasopismo: Konstrukcje Stalowe
• Rocznik: 2003
• Tom: nr 5 spec.
• Strony: CD--CD
• Opis fizyczny: -ROM, s. 111--122, Bibliogr. 13 poz., il.

Twórcy

autor

Branicki C.

• University of Technology, Gdańsk, Poland

autor

Giżejowski M.

• University of Botswana, Gaborone, Botswana
• Warsaw University of Technology, Warsaw

autor

Barszcz A.

• Warsaw University of Technology, Warsaw, Poland

autor

Uzoegbo H.

• University of Botswana, Gaborone, Botswana
• University of Witwatersrand, Johannesburg, RSA

Bibliografia

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• [2] ECCS Publication: Ultimate limit state calculation of sway frames with rigid Joints. European Convention of Constructional Steelwork. Publication No 33, Brussels, 1984.
• [3] Chen W. F., Toma S.: Advanced analysis of steel frames. Theory, software and applications. CRC Press. London, 1994.
• [4] ENV 1993-1-1: Eurocode No 3. Design of steel structures. Part 1 – General rules and rules for buildings. CEN, Brussels, 1992.
• [5] Yau C.Y., Chan S.L.: Inelastic and stability analysis of flexibly connected steel frames by spring-in-series model. Journal of Structural Engineering, ASCE, 2803-2819, 1994.
• [6] SSEDTA: Structural Steelwork Eurocodes – Development of a Trans-national Approach. A training package for the teaching of Eurocodes 3, 4. CD produced with the financial support of the Commission of the European Committees under the Leonardo Da Vinci Programme, 2000.
• [7] Weiss S., Gizejowski M.: Stability of metal structures. Beam structures. Arkady, Warsaw, 1991 (in Polish).
• [8] Branicki C.J.: STAPLE. Program for statics, P-Delta and stability analysis. CAL/CAT Structural Analysis Software. Version for the University of Botswana, Gdansk, 2002.
• [9] Branicki C.J.: LILAN. Program for plastic analysis of planar frames. Supplement to STAPLE Manual. CAL/CAT Structural Analysis Software. Version for the University of Botswana, Gdansk, 2002.
• [10] Cunningham R.: Some aspects of semi-rigid connections in structural steelwork. The Structural Engineer, Vol. 68, No 5/6, March 1990.
• [11] ECCS Publication: Analysis and design of steel frames with semi-rigid joints. European Convention for Constructional Steelwork. Publication No 67, Brussels, 1992.
• [12] Gizejowski M.: Computational models of steel plane frames with semi-rigid joints. Series: Civil Engineering, Vol. 136, Warsaw University of Technology Press, Warsaw, 2000 (in Polish).
• [13] Kishi N., Chen W.F.: Moment-rotation relations of semi-rigid connections with angles. Journal of Structural Engineering, ASCE 116 (7), 1990.