繰返し荷重を受ける鋼構造架構の履歴特性と構造減衰性 (梗概)

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1) In all types of collapse mechanisms, each test specimen carrys yield load and maximum strength the value of which are about 10〜30 percents greater than theoretical values by Plastic Hinge Method. Lateral deformations at starting points of unrestrained plastic flows are about 10 percents larger than calculated values which involve shear deformations. 2) Each Specimen maintains adequate plastic rotation capacity and carrys almost a constant strength after local buckling of flange plates. Local bucklings will not fall the frame immediately into collapse. Usually final states are restrained by lateral bucklings of the frames. 3) General form of hysteresis loop is a spindler shape and of "Softening Type". Hysteresis loop will become in steady state within a few cycles of repeated loadings and be stable in increasing deformations after yieldings. Critical deformations are influenced remarkably by axial forces. Rigidities under repeated loadings after yieldings decrease about 10% in final states. 4) Dissipated energy per one cycle over yield point increase almost linearly. As compared equivalent viscous damping coefficient h_<eq> with specific damping capacity d_s, the latter will be more available for non-linear range. In final state, h_<eq> is 0.17 and d_s is 0.85. 5) Formal representations of skeleton curves will be in good coincidence with experimental curves. Compared damping energy and equivalent viscous damping coefficient on the basis of the formal representation, we found remarkably good indentifications.
社団法人日本建築学会の論文
1966-02-28

繰返し荷重を受ける鋼構造架構の履歴特性と構造減衰性 (梗概)

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