复杂框架结构杆件有效长度系数的计算方法  

Calculation of Coefficient of Effective Length of Portal Frame

作　　者：陈鹏[1] 黄怀州[1] 靳宝旺 尹光荣[1] 

机构地区：[1]海洋石油工程股份有限公司,天津300451

出　　处：《中国造船》2017年第A01期462-468,共7页Shipbuilding of China

摘　　要：导管架平台的门形框架是一种复杂框架结构,其有效长度系数是结构设计的关键参数,但因为边界约束不 同于理想情况无法直接套用理想受压杆的理论值,通常采用简化处理选取保守的数值进行结构设计.论文针 对门形框架有效长度系数的取值分别研究了有效长度系数计算图法和基于有限元的非线性屈曲分析法,最后 结合算例给出工程应用实例,为今后类似结构设计提供参考和借鉴.The coefficient of effective length is an important parameter to calculate stability of the complex frame structure such as jacket portal frame. An accurate calculation is needed because of different boundary constraints from that of the ideal compression member, for which the simplified treatment is commonly selected in structural design. An alignment chart of calculating effective length and nonlinear buckling analysis based on finite element analysis is studied. High consistency of sample problem is given for better understanding and illustration. The analysis method and procedure may be used as a reference to other similar structural design in engineering projects.

关 键 词：导管架平台 门形框架 有效长度系数 计算图法 非线性屈曲分析 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]