FRACTURE BEHAVIOR OF STEEL STRANDS CORRODED IN CONCRETE CONTAMINATED WITH SALT
The specimens of corroded steel strands were presented by concrete members mixedwith salt. By static tension tests with the specimens of corroded steel strands and flexuralfatigue tests with the specimens of wires got from corroded steel strands,the fracture behavioris studied in this paper. The results show that,the fractures of wires of corroded steel strandsunder static tension include 3 basic modes and their combined modes,the basic modes arecleavage,fraise and cup; the fracture depends on the comparison between strain effect andstrain resistance in pits; strain effect must increase near pits,and strain resistance decreases nearpits when fracture is cleavage. The flexural fatigue fracture of wires of corroded steel strandsshows an obvious anisotropic characteristic. When corrosion is slight,fatigue is the leadingfactor to corrosion fatigue and corrosion plays a role to assist nucleation of crack; whencorrosion is severe,fracture is controlled by both corrosion and fatigue,and corrosion play theroles not only to assist nucleation of crack but also to accelerate the developing of crack.
steel strands corrosion fracture static tension corrosion fatigue
F. M. LI Y. S. YUAN J. H. JIANG J. M. DU
School of Architecture and Civil Engineering,China University of Mining and Technology,PR China
国际会议
The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)
杭州
英文
669-675
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）