慕遂峰
    （中船第九设计研究院工程有限公司，上海 200063）

[摘要] 针对钢筋混凝土错层框架结构，分别采用折减刚度的弹性有限元法（即考虑二阶效应的弹性分析方法）和柱截面偏心距增大系数法（即规范中给出的通过确定计算长度来考虑二阶效应的传统方法）进行了二阶效应的计算，研究了错层框架结构考虑二阶效应的传统方法的适用范围和计算长度取值等问题，并提出了相应的设计计算方法建议。
[关键词] 钢筋混凝土错层框架结构；二阶效应；计算长度
中图分类号：TU375.4    文献标识码：A  文章编号：1002-848X(2012) Sl-0349-03

Utility method considering the second effect of staggered RC frame structure
Mu Suifeng
(  China Shipbuilding NDRI Engineering Co., Ltd., Shanghai 200063, China)

Abstract: Two different methods considering the second effect of staggered RC frame structure was used. One is elastic finite element method of reduced rigidity( elastic analysis method considering the second order effect), and the other is the method utilizing the eccentricity enhancement coefficient of column section( the conventional method proposed in the code which considering the second effect by the determination of the calculating length).The scope of application using the conventional method to consider the second order effect of staggered RC frame structure, and the confirmation method of calculating length of the column were analyzed. Correspondingly the design calculating method suggestion is also proposed.
Keywords: staggered RC frame structure; the second order effect; calculating length