Abstract: The creep-shrinkage effect of CFST is different from that of reinforced concrete because of its containment，stiff consistency and not casting water during curing period as well as its unloading.The stress recontribution of CFST is significant and must not be ignored.In order to calculate the redistributed stress effectively，according to the elastic creep theory and the principle of superposition，one general formula of analytical model for CFST creep function has been suggested based on the theory analysis on the creep-shrinkage effect of axis compression component[1].One creep model and one compensation model were made.The strain tests results met the theory analysis，and proved the formula.

Key words: CFST, creep-shrinkage efect, theoretical analysis, test research, stress redistribution

摘要： 钢管砼结构徐变由于物理状况上封闭、干硬性、养生时不浇水，受力上卸载而低于普通砼的徐变，由于徐变导 致的钢管和砼的应力?重分布十分明显而不可忽视，为了有效计算核心砼徐变导致的重分布应力，在推导轴心受压 构件徐变公式的基础上，结合大小偏心受压构件的受力特点，偏安全地考虑最大纤维处的徐变，根据弹性理论及叠 加原理推导了钢管砼构件徐变系数的一般计算公式，并测试了轴心受压和偏心受压结构的徐变应变和收缩应变，经 比较，徐变计算比较吻合，验证了理论分析．

关键词: 钢管砼, 收缩徐变, 理论分析, 试验研究, 应力重分布