Applicability of Notinal Load - Plastic Hinge Analysis to Structural Design of Steel Frames ABSTRACT ; Plastic hinge method inherently assumes the elastic-perfectly plastic momentcurvature relation which results in unconservative strength of the frame. A gradual spread of plasticity in members is not considered. To fill this lack and include the effects of initial imperfections, the fictitious (notional) horizontal force is applied. It is assumed to be proportional to the gravity loads so that the stability of the frame can be assessed with improved accuracy. The present paper compares the strength and behaviors of frames between the plastic hinge-notional force analysis and the more exact analysis and concludes that this design method is most practical and useful. plastic hinge analysis, steel structures, structural analysis, notional horizontal force
Steel Construction Engineering Vol.3 No.12(December 1996)
Steel Construction Engineering Vol. 3 No. 12(December 1996)
Steel Construction Engineering Vol. 3 No. l2(december 1996) (a) A=0.3 (L/r=21) (b) A =0.6 (L/r=41) (c) A=0.9 (L/r=61)
Steel Construction Engineering Vol. 3 No. 12(December 1996)
Steel Construction Engineering Vol.3 No.12(Decernber 1996) SSRC, 1993. 18) S. Toma, and W.F. Chen, European Calibration 4) American Institute of Steel Construction (AISC) Frames for Second-Order Inleastic Analysis, Load and Resistance Factor Design (LRFD) Engineering Structures, Vol. 14, No 1, 1992. Specification for Structural Steel Buildings, 1993. 6) S. Toma, et al., Design of Frames Using Notional Horizontal Force, Structures Congress XII, ASCE, 1994. 7) M.J. Clarke et al., The Design of Steel Frames Using the Notional Load Approach, SSRC Technical Report, 1995. 8) Canadian Standards Association, Limit States Design of Steel Structures, CANICSA-516.1-M94, 1994. 9) Standards Australia, Steel Structures, AS4100, 1990. 10) European Committee for Standardization, Design of Steel Structures, Eurocode 3, 1993. 11) British Standards Institution, Structural Use of Steelwork in Building - Part 1, BS5950,1990. 12) J.Y.R. Liew, D.W. White, and W.F. Chen, Notional-Load Plastic-Hinge Method for Frame Design, J.of Structural Engineering, ASCE, Vol. 120, Nos. 13) J.Y.R. Liew, Chapter 4 Second-Order Plastic Hinge Analysis of Frames, Advanced Analysis of Steel Frames, edited by W.F. Chen and S. Toma, CRC Press,1993. 14) S. Toma, and W.F. Chen, A Selection of Calibration Frames in North America for Second- Order Inelastic Analysis, Engineering Structures, Vol. 17, No 2, 1995. 15) S.P. Zhou, Chapter 5 Plastic-Zone Analysis of Beam-Columns and Portal Frames, Advanced Analysis of Steel Frames, edited by W.F. Chen and S. Toma, CRC Press, 1993. 17) D.W. White, et al., Toward Advanced Analysis in LRFD, Plastic Hinge Based Methods for Advanced Analysis and Design of Steel Frames, 30