Based on current concrete design criterion, a torsion stiffness formula for composite beams from the cracking stage to the limit stage was proposed for design reference.

基于现行硅结构设计规范，提出了组合梁从开裂到极限阶段抗扭刚度的计算公式，可供组合梁受扭设计参考。

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The traits of modes are also analyzed, and the weaker stiffness parts of the structure are found which provide reference for the aseismic analysis of the structure.

分析了结构的振型特征，找出了结构中刚度较弱的部位，为结构的抗震性能分析提供了参考。

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A practical and simple method is thus proposed for calculating the transverse and longitudinal stiffness of a single-story workshop and this is for the reference of the structural designers.

本文提出了关于单层工业厂房横向与纵向刚度实用和简单的计算方法，以供结构设计工作者参考。

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