超大跨度空间X撑结构屈曲强度特性研究

为了深入研究深水导管架平台超大跨度空间X撑结构的承载机理,合理地指导工程设计,本文在已有理论模型的基础上,研究了空间X撑结构(有面外支撑X撑结构)在典型的载荷模式、刚度特性、端点约束以及长度因子(交点位置)等参数下屈曲长度系数的变化规律,结合实际工程深水导管架结构,辅助有限元计算对超大跨度有面外支撑X撑结构进行了屈曲强度分析,最后得到了可为工程设计提供有效技术支撑的多个结论。

Study on buckling strength characteristics of the super-span space X-brace structure

In order to deeply study the load-bearing mechanism of an X-braced structure and reasonably guide engineering design,based on the existing theoretical models,this paper studies the transformation law of the buckling length coefficient of the X-braced structure with out-of-plane supports under typical load patterns,stiffness characteristics,endpoint constraints,and length factor (intersection position).Applied to an actual deepwater jacket structure,the buckling strength of the super-span space X-braced structure with out-of-plane support is analyzed by using the finite element method,and several conclusions are obtained which would provide effective technical support for engineering design.