抄録
In this paper, the first, correlation of plastic behavior between cyclic loading and monotonic loading are discussed based on analytical and experimental results. The summaries are as follows : 1) The plastic behavior (axial load carrying capacity-axial deformation relation) of the web effects on the plastic cyclic behavior (resisting moment-rotation relation) of the steel beam-columns. 1-1) In the case of strain hardening modulus ratio of the web μ_w>0, the yield load at i/2th cycle is larger than the reversed load at (i-2)/2th cycle. 1-2) In the case of μ_w<0, the yield at i/2th cycle is smaller than the reversed load at (i-2)/2th cycle. 2) The correspondency of the plastic behavior under monotonic loading and cyclic loading is as follows : Without regard to value of n, when [numerical formula] and [numerical formula], where b/f is width-to-thickness ratio of the flange, D/w is width-to-thickness ratio of the web, σ_y is the yield point stress of the material evaluated in ton/cm^2, good correspondency was observed. Next, the influences of the width-to-thickness ratios of the plate elements, axial load ratio, amplitude, and material properties on relations between accumulated energy absorption Σe and accumulated plastic deformation Σδp are discussed. Ratios of the experimental value (Σe)_<exp> at Σδp=20 to the theoretical value (Σe)_<th> that is obtained based on the perfectly elastic-plastic behavior of the member α are evaluated as follows : In the case of n=0 [numerical formula] In the case of n=0.3 [numerical formula]
