单管柱与格构柱组合式支撑架体系的稳定性研究

Stability Analysis of Single Tube Column and Lattice Column Combined Support Frame System

针对湖州奥林匹克体育场中单管柱与格构柱组合式支撑架体系,采用有限元分析方法对该体系的整体失稳特点、立柱计算长度系数的取值进行了分析;然后对影响双层单跨非对称框架结构整体稳定性的柱顶不对称荷载、柱刚度比、梁柱线刚度比三个因素进行了深入的研究,得到了以上因素下单管柱及格构柱计算长度系数理论解的图表,可以直观地查看到计算长度系数随各相关参数的变化规律,以供技术人员选用。同时,通过实例的对比分析,验证了以上计算长度系数图表的准确性和合理性。

For the single tube column and lattice column combined support frame system in Huzhou Olympic Stadium,finite element method is used to analyze the overall instability characteristics of the system and the value of calculation length coefficient of column.The influence of three factors--asymmetric load,column stiffness ratio,stiffness ratio of beam to column,on the overall stability of a two-story single-bay asymmetric frame structure has been studied.The charts for calculating the exact length coefficients of single tube column and lattice columns under above factors are obtained.It can be easily found the changing rule of calculation length coefficient with all related parameters and can be used by engineers.Also,the accuracy and rationality of the charts mentioned above have been verified by the comparison and analysis of examples.