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混凝土徐变对结构应力、变形的影响较大,进行准确的结构分析必须考虑混凝土徐变。按龄期调整的方法对混凝土徐变计算有效模量理论进行修正,提出等效弹性模量计算公式。运用大型通用有限元软件ANSYS参数化程序设计语言APDL编写命令,在每一时段赋予材料对应等效弹性模量并计算混凝土结构的徐变,把徐变问题化为相当的弹性问题。并通过算例验证此方法在实际工程应用中的有效性。
Concrete creep has a great influence on the structure stress and deformation, so concrete creep must be considered in the accurate structural analysis. According to the method of age adjustment, the effective modulus theory of concrete creep calculation is revised, and the formula of equivalent elastic modulus is proposed. The large common finite element software ANSYS parametric programming language APDL is used to write commands to assign the equivalent elastic modulus to the material and calculate the creep of the concrete structure at each time, and to change the creep problem into a rather elastic problem. An example is given to verify the effectiveness of this method in practical engineering.