模拟酸雨腐蚀钢管混凝土构件静力性能研究

该文讨论了模拟酸雨腐蚀环境下钢管混凝土构件静力性能的退化规律，具体包括模拟酸雨腐蚀后：钢材材料力学性能；钢管混凝土构件轴压力学性能；钢管混凝土构件纯弯力学性能；钢管混凝土构件偏压力学性能。分析了腐蚀率对钢材屈服强度、弹性模量、极限抗拉强度和极限延伸率的影响，采用钢管壁厚折减以及壁厚折减耦合材性折减的模拟腐蚀损伤方法，结合有限元ABAQUS软件、规范公式，分别计算了构件荷载-变形关系曲线、极限承载力，并和试验结果进行了比较，发现钢管壁厚折减方法优于壁厚折减耦合材性折减方法，地方标准严于国家标准。

STATIC BEHAVIOR OF CORRODED CONCRETE-FILLED STEEL TUBULAR MEMBERS BY SIMULATING ACID RAIN SOLUTION

It discusses the static performance deterioration of corroded concrete-filled steel tubular members by simulating acid rain solution,including:the mechanical properties of corroded steel materials;the axial compressive behavior of corroded concrete-filled steel tubular members;the pure bending mechanical properties of corroded concrete-filled steel tubular members;the eccentric compressive mechanical properties of corroded concrete-filled steel tubular members.The impact of corrosion ratio on the yield strength,elastic modulus,ultimate tensile strength,and ultimate elongation of corroded steel are analyzed.By using wall thickness reduction and wall thickness coupling with material property reduction method to simulate corrosion damage in conjunction with finite element commercial software ABAQUS and design code formulas,the relationships between load and displacement as well as the bearing capacity of corroded concrete-filled steel tubular members are computated.The computational solutions are compared with the test results,implying that the wall thickness reduction method is superior to the wall thickness coupling with material property reduction method,and that the local design code is stricter to the state code.