摘要： 在基于继效流动理论建立的钢管混凝土受弯构件徐变计算方法基础上,综合考虑影响钢管混凝土受弯构件徐变的各种因素,从含钢率、作用弯矩级别和时间等几个方面,应用回归分析的方法,得到便于实际设计应用的钢管混凝土受弯构件徐变设计公式。为了检验徐变设计公式的使用效果,使用设计的回归公式对具体算例进行分析,并与文献方法计算的钢管混凝土受弯构件徐变值进行比较。所回归设计计算公式的计算结果与理论计算值符合得较好,并且该公式具有形式简单、考虑因素全面的特点,便于在工程实践中推广和设计规范中采用。 Abstract: According to the calculating method for creep of flexural Concrete Filled Steel Tubular(CFST) members,which is based on the creep theory of Elastic Continuation and Plastic Flow(ECPF),a formula to design creep of eccentrically compressed CFT members is obtained by using theory of regression analysis,with considering the factors,such as steel ratio,bending moment and loading time.For verifying its suitability,the design formula is used to calculate the creep of CFST flexural member of two samples,and the results are compared with those gotten by the method presented in literature[1].With the advantages such as simple form,thorough consideration for influential effects and good precision,the formula can be used conveniently in actual engineering and adopted by the specifications.
