1. Aktan A. Pecknold D. and Sozen M. A. (1973). “Effects of two dimensional earthquake motion on a reinforced concrete column.” Rep. No. UILU‐ENG 73‐2009 University of Illinois Urbana Ill.
2. Inelastic Beams for Seismic Analyses of Structures
3. Arzoumanidis S. and Meyer C. (1981). “Modelling reinforced concrete beams subjected to cyclic loads.” Dept. of Civil Engineering Technical Report Columbia University New York N.Y. Mar.
4. Chen P. (1982). “Generalized plastic hinge concepts for 3D beam column elements.” Rep. No. EERC 82‐20 Earthquake Engineering Research Center Berkeley Calif.
5. Clough R. and Johnston S. (1966). “Effect of stiffness degradation on earthquake ductility requirements.” Proc. Second Japan Earthquake Engrg. Symp. Tokyo Japan 227–232.