线性徐变问题的两个定理及对计算方法的简化

在大体积混凝土结构中，徐变应力的分析是个十分重要的问题。本文在线性徐变条件下，（１）导出了关于徐变度和松弛系数的两个定理；（２）提出了直接由徐变度求松弛系数的一种递推公式；（３）对求解徐变问题的初应变法和初应力法，导出了对于任意的松弛系数和徐变度表达式的一般递推公式，从而简化了计算方法，避免了应变或应力历史资料的存贮，节省计算机的大量存贮量。

TWO THEOREMS ON LINEAR CREEP PROBLEMS AND THEIR APPLICATIONS

In this paper,based on linear creep assumption,(1) tWo theorems about creepcoefficient C(t)and relaxation coefficient K_p(t,)are dirived, i.e.if the time, the creep coefficient and relaxation coefficient satisfy the following equations:(2)the recurrence formula of solving the relaxation coefficient K_p(t,)directly from thecreep coefficient C(t)is presented;(3)the general recurrence formulas of initial strainmethod and initial stress method for any kinds of expressions of C(t,)and K_P(t, )aredirived,they can simplify the calculating methods,and avoid the storages of strain andstress history.