1. 1) Morris, G. A. and Fenves, S. J. : Elastic-Plastic Analysis of Frameworks, Proc. ASCE, Vol. 95, ST5, pp. 931-946, 1970.
2. 3) Wakabayashi, M., Shibata, M., Matsui, C. and Minam, K. : A Study on the Behavior of Steel-Reinforced Concrete Columns and Frames, Prelim. Rep. IABSE Sympo. Quebec, pp. 45-52, 1974.
3. 4) Shugyo, M. : A New Plastic Hinge Method for Steel Space Frame, Theoretical and Applied Mechanics, Vol36, pp. 245--262, 1988.
4. 6) Lay, S. S., Will, G. T. and Otani, S. : Model for Inelastic Biaxial Bending of Concrete Members, Jour. Struct. Engng., ASCE, Vol. 10, No. 11, pp. 2563-1484, 1984.11.
5. 8) Shibata, M. : Analysis of Elastic-Plastic Behavior of a Steel Brace Subjected to Repeated Axial Force, Int. J. Solids Structures, Vol. 18, No. 3, pp. 217-228, 1982.03.