铁道科学与工程学报Issue(2)：317-322,6.
考虑徐变的钢－混凝土组合箱梁的变形计算
Long-term deflection of steel-concrete co mposite box-bea m due to creep
摘要
Abstract
The ratio of modulus of elasticity of steel to that of concrete termed asαE was modified to consider the influence of the creep of concrete in the updated draft Code for design of steel structures,and the modification value was 2αE.However,the creep of concrete depends on the strength of the concrete,the calculation time, etc;therefore with this method it cannot reflect the deformation of the composite beams exactly under long term loadings.In this paper,the related factors regarding creep of concrete were considered in calculation of the long-term deflection of composite beams,and theoretical derivation was performed.The formula for calculation of long-term deflection of steel-concrete composite beam was then established,and it was also simulated in this paper by ANSYS.The comparisons between the calculated and simulated values indicate that the suggested for-mula in this paper is feasible to calculate the long-term deflection of composite box-beams.关键词
钢-混凝土组合箱梁/有限元/徐变/长期变形Key words
steel-concrete composite box-beam/finite element/creep/long-term deflection分类
建筑与水利引用本文复制引用
刘亚茹,刘小洁..考虑徐变的钢－混凝土组合箱梁的变形计算[J].铁道科学与工程学报,2015,(2):317-322,6.基金项目
国家自然科学基金资助项目 （）
