利用非线性有限元方法对预应力框架结构的混凝土徐变、收缩及预应力松驰进行分析

在利用条带法进行混凝土非线性分析的基础上，将这种方法应用于预应力框架结构由于混凝土徐变、收缩以及预应力松驰所引起的结构内力重分布这类问题中去，考虑到由于混凝土徐变等原因引起了混凝土弹性模量的改变，因此利用非线性分析的方法可以较好地解决由于材料本构关系变化而引起的一系列问题，通过例题可以看出，利用本文理论所编制的程序得到的结论较为理想。

Analysis of creep,shrinkage,relax of prestressed tendons of the prestressed concrete frames with nonlinear finite element method

Under the strip method that the author had used in analyzing the nonlinear reaction of concrete frame,in this paper the author use this method to solve the problems that are made by some element such as creep,shrinkage,relax of prestressed tendons,because when forces are changed the elastic modulus of concrete will change,and by using this method we can solve this problem well,and with an example in the end this paper shows that with the theory and the programs the result is very good.