抄録
The description of the simple method of three dimensional elasto-plastic analisis consists of following seven chapters and "conclusion". §1. Assumptions §2. Approximate Solutions of Simultaneous Differrential Equations of Eqilibrium §3. Non-Linear Three Dimensional Elastic Slope Deflection Equations §4. Three Dimensiomal Elasto-Plastic Slope Diflection Equations §5. Moment-Curvature Relationships and the Values of Variable Coefficients §6. Analysis Procedure for Frames §7. Comparision with Experimental Results This paper refers to §1, §2 and §3, and the others are described in the next paper. In §2, the discretizaion was made for non-linear simultaneous differerential equations of eqilibrium of the member under three dimensional loading, which is difficult to solve analytically. And as a result, these approximate general solutions were obtained. In §3, the three dimensional slope deflection equations were derived from these general solutions, which is the steps to analize three dimensional elasto-plastic behaviour of steel structures.
