摘要
通过快速电解锈蚀试验,得到不同锈蚀率的工字钢混凝土试件。将这些试件进行粘结滑移试验,描述工字钢与混凝土的粘结滑移过程,分析锈蚀率、滑移量、粘结破坏荷载之间的关系,建立未锈蚀工字钢与喷射混凝土的粘结滑移模型,得出粘结滑移影响系数与锈蚀率的回归公式,最终建立锈蚀工字钢与喷射混凝土的粘结滑移本构关系数学模型。结果表明:随着锈蚀率的增加,滑移量和粘结破坏荷载均降低;未锈蚀工字钢与混凝土的平均粘结应力是滑移量的四次多项式函数;锈蚀工字钢与混凝土的粘结强度影响系数与锈蚀率的二次多项式函数。
By the accelerated electroanalysis corrosion test,I-beam concrete specimens with different corrosion degrees were obtained.Based on the bond-slip tests with these specimens,the process of bond-slip between I-beam and shotcrete was described,and the relationship between corrosion degree,slippage and bond damage load was analyzed.Then the bond-slip model of an uncorroded I-beam and shotcrete was established,and the calculation formulas of influence coefficient for bond strength and corrosion degree were founded by a regressing method.Finally the bond-slip constitutive relation model of a corrosive I-beam and shotcrete was established by the mathematic method.The results show that： the slippage and bond damage load all decrease with the increase of the corrosion degree,the average bond stress is the fourth-degree polynomial function of the slippage in the uncorroded I-beam shotcrete,and the influence coefficient for bond strength is the quadratic polynomial function of the corrosion degree.
出处
《工程力学》
EI
CSCD
北大核心
2013年第4期310-315,330,共7页
Engineering Mechanics
基金
中央高校基本科研业务费专项资金项目(SWJTU11ZT33)
教育部创新团队发展计划项目(IRT0955)
