[提要]  通过对5个工程实例的整体计算，讨论了钢筋混凝土现浇楼梯对框架、框架-剪力墙和剪力墙三种结构形式整体刚度和构件内力的影响。结果表明，计入楼梯踏步板对框架结构的白振周期、刚度分布及构件内力影响较大，对框-剪结构有一定影响，对剪力墙结构影响不大。
[关键词]  楼梯  白振周期  构件内力  框架结构框架-剪力墙结构  剪力墙结构

The intention is to study the effect of cast-in-place stairs on the structural stiffness and internal forces of members through the analysis of five engineering cases including reinforced concrete frame, frame-shear wall and shear wall structural style. The result of the analysis shows that consideration of stairs in calculating greatly affects the natural period, stiffness distributing and internal forces of members in frame structure. The effect becomes light in frame-shear structure and can be ignored in shear wall structure.
Keywords:  stair; natural period; internal forces; members; frame structure; frame-shear wall; shear wall