Structural Similarity on Cyclic Responses and Corrosion Impact for Circular and Square Sectional Reinforced Concrete MembersStructural Similarity on Cyclic Responses and Corrosion Impact for Circular and Square Sectional Reinforced Concrete Members 矩形および円形断面を有するRC部材の構造応答に及ぼす鋼材腐食の影響と応答相似性