摘要:简要地介绍了规范对位移比、周期比的规定，根据作者多年设计工程经验，对位移比、周期比的本质进行了探讨和思考，强调了控制扭转变形的重要性，并列举了位移比、周期比的一些基本概念、理论知识、程序操作及在实际设计中常用的一些控制周期比、位移比的方法，文章最后列举了在实际设计中，位移比、周期比要注意的一些问题。

Abstract: Based on its writer's design and engineering experiences, this article explores the natures of displacement ratio and period ratio and introduces relevant codes and regulations. It emphasizes the importance of torsional deformation control and introduces some basic concepts, theories, operation procedures of displacement ratio and period ratio as well as some common methods for controlling displacement ratio and period ratio in design. In the end, the article puts forward some issues that should be paid attention to concerning displacement ratio and period ratio.