摘要
为了研究箍筋锈蚀对轴压混凝土短柱承载力的影响,对采用外加电流法获得的仅箍筋锈蚀的钢筋混凝土短柱进行轴压承载力试验.结果表明:随着箍筋锈蚀率的增大,柱的极限承载力降低,荷载-纵向位移曲线的斜率减小.随着箍筋锈蚀程度的加重,柱的脆性破坏特征更加明显.采用变刚度的弹簧模拟箍筋锈蚀区段内箍筋对主筋的约束,建立考虑箍筋锈蚀引起的保护层剥落、箍筋对混凝土的约束能力降低、箍筋对主筋的支撑作用降低等因素的箍筋锈蚀轴压混凝土短柱承载力模型.模型计算值与试验值之比的平均值为0.955.
Load bearing capacity test was conducted on the reinforced short concrete columns with stirrup being corroded by impressed current method in order to analyze the effect of corrosion of stirrups on load bearing capacity of short concrete column under uniaxial compression.Results showed that the ultimate bearing capacity was decreased and the slope of load-displacement curve was decreased with the increase of stirrup corrosion.The failure of the column presents more obvious brittle characteristics with the increase of stirrup corrosion.The spring of the variable stiffness was adopted to simulate the constraints of stirrups to reinforcement.The load bearing capacity model of uniaxial short column considering the concrete cover spalling,reduction of concrete strength and supporting role of stirrup to longitudinal reinforcement caused by corrosion stirrup was established.The average ratio of prediction results to test results is 0.955.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2015年第10期1929-1938,1951,共11页
Journal of Zhejiang University：Engineering Science
基金
国家"973"重点基础研究发展规划资助项目(2015CB655103)
国家自然科学基金资助项目(51478419)
浙江省科技计划资助项目(2013C31011)
关键词
钢筋混凝土
轴心短柱
箍筋
锈蚀
力学性能
承载力
reinforced concrete
axial short column
stirrup
corrosion
mechanical property
bearing capacity
