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INVESTIGATION OF LOW CYCLE FATIGUE BEHAVIOR OF BUILDING STRUCTURAL STEELS UNDER EARTHQUAKE LOADING

G.M Sheng and S.H Gong(Department of Metallurgy and Materials Engineering , Chongqing University Chongqing 630044 , China)

金属学报(英文版)

Based on the failure model of building structural steels under earthquake loading, the low cycle fatigue test at constant strain, the stochastical fatigue test under real earthquake load spectrum and the structural fatigue test are carried out. The experimental results show that microalloying of V Ti and Nb can improve the anti-seismic propersties of steel bars. In the high strain and shori life range, both the static strength and ductility of steels are very important to increasing the low cycle fatigue resistance of steels.

关键词: low cycle fatigue , null , null , null