鋼板の塑性流れ域における曲げ剛性およびせん断係数と座屈 : せん断力をうける場合

概要

論文の詳細を見る
Plasticity in steel is characterized by an appreciable amount of plastic flow which precedes strain-hardening. This study deals with an evaluation of the out of plane flexural rigidities and the modulus in shear of yielded steel plates at the instance of plate buckling under shear force. Assuming that the stress-strain response of steel in this range follows the incremental plasticity theory for nonhardening material together with von Mises' yield criterion, an explicit formulation is derived for the moduli to relate the flexural rigidities and the modulus in shear of steel plate. Comparison is made of the magnitude of so derived moduli with those in the strain-hardening range. In both range of plastic flow and strain-hardening, flexural rigidities have the same values with those in the elastic range. However modulus in shear in the plastic flow range differs from that in the strain-hardening range. And in the former range, its value equals to zero. Buckling of steel plate with its four edges simply supported under shear force is examined by the moduli derived from the viewpoints of buckling stress and strain. As the difference of the results between the plastic flow and strain-hardening range is small and they can be regarded as the same, analysis is performed by the moduli in the plastic flow range.
社団法人日本建築学会の論文
1987-08-30