混凝土结构的粘弹性分析

Viscoelastic Analysis of the Concrete Structure

在超静定钢筋混凝土结构中,徐变能引起应力状态的变化,原因是某处的变形没有相似性,只取决于所施加的轴向荷载,而无侧移钢筋混凝土框架的一般分析方法将会导致一组Volterra积分差分方程组,且用起来相当复杂。因此,本文以龄期调整的有效模量法为基础提出了一种近似方法,它通过实际应用中专门推荐的一种特殊弹性分析来解决这个问题。文中还举例说明如何应用这种方法。

Creep of concrete leads to the change of stress state in the inde- terminate RC structures because the deformations at a single part are not similar and depend on the applied axial load.The general analysis method of the no-sway RC frame leads to a set of integro- differential Volterra equations and is rather complex for applica- tion.Based on the age adjusted effective model method,an appr- oximate method is presented in this paper so that the problem is solved by a particular elastic analysis,which is recommended for practical case.The application of the method is shown through two examples.