中国铁道科学2018，Vol.39Issue(1)：39-48,10.DOI:10.3969/j.issn.1001-4632.2018.01.06
钢管混凝土拱桥稳定极限承载力的线弹性迭代方法
Linear Elastic Iteration Method for Ultimate Stability Bearing Capacity of Concrete Filled Steel Tubular Arch Bridge
摘要
Abstract
The finite element model for calculating the ultimate stability bearing capacity of the concretefilled steel tube (CFST) arch bridge was established using linear elastic beam element characterized by single composite material property.Based on the correlation equations of stability bearing capacity for CFST members under compression and bending,a widely applicable Homogeneous Generalized Yield Function (HGYF) was derived by means of comprehensive test method and regression analysis method.Then a linear elastic iteration method was proposed for determining the ultimate stability bearing capacity of the CFST arch bridge by means of elastic modulus reduction method.Comparisons between the results of the proposed method and those from experiments and different numerical methods show that the proposed HGYF can overcome the drawbacks of the traditional generalized yield function whose results vary with initial load.The elastic modulus can be adjusted by means of elastic modulus reduction method to realize the redistribution of structural internal force.The ultimate bearing capacity of the structure can be calculated by means of linear elastic iteration method.The limitations of incremental nonlinear finite element method are overcome,and higher calculation precision and efficiency can be obtained.The stability coefficient expression suggested in the code of CFST arch bridge has good stability and applicability.关键词
钢管混凝土拱桥/极限承载力/稳定系数/齐次广义屈服函数/弹性模量缩减法Key words
Concrete filled steel tubular arch bridge/Ultimate bearing capacity/Stability coefficient/Homogeneous generalized yield function/Elastic modulus reduction method分类
交通工程引用本文复制引用
解威威,叶志权,杨绿峰..钢管混凝土拱桥稳定极限承载力的线弹性迭代方法[J].中国铁道科学,2018,39(1):39-48,10.基金项目
国家自然科学基金资助项目(51478125) （51478125）
广西研究生教育创新计划资助项目(YCBZ2017024) （YCBZ2017024）
