中文摘要：

针对初应力法精度较高、但求解较为繁琐的问题,采用逐步积分法求解应力松弛方程的方法,放弃混凝土弹性模量为常量的假定,考虑混凝土弹性模量和徐变度随龄期变化,易于求得混凝土应力松弛系数。验证表明,提出的应力松弛系数计算方法的计算结果与影响函数法求出的应力松弛系数理论解进行对比,误差在1.35%范围内,验证了该计算方法的正确性,为混凝土应力松弛系数的计算方法提供了一定的借鉴意义。

英文摘要：

Aimed at the problems of high accurate and complex computation for the initial stress method, stress relaxation equation was calculated by using the method of stepwise integral method,the hypothesis that the elastic modulus of concrete is constant is abandoned, the author considered the elastic modulus and creep of concrete are changing with age, and it is easy to gain the relaxation coefficient of the stress. The results show that,the calculated results of the stress relaxation coefficient are compared with the theoretical solution of the stress relaxation coefficient obtained by the influence function method,the error is within 1.35% ,which verifies the correctness of the calculation method,which has provided some reference for the calculation method of the stress relaxation coefficient of concrete.