考虑几何非线性三铰静定刚架的稳定计算  

STABILITY COMPUTATION ON STATICALLY DETERMINATE FRAME CONSIDERING GEOMETRICAL NONLINEARITY

作　　者：刘言彬[1] 张大长[1] 

机构地区：[1]南京工业大学土木工程学院,南京210009

出　　处：《低温建筑技术》2008年第6期75-76,共2页Low Temperature Architecture Technology

摘　　要：由于叠加原理不适用于二阶分析,考虑到稳定问题的几何非线性——内力和变形关系,结构稳定的计算应采用整体观点;基于此作者介绍了在小变形范围内将整体观点应用于稳定问题的方法。并且以三铰静定钢架为例,采用整体的观点求出了作用在横梁上不同位置时最大失稳荷载,即结构整体失去稳定的最大荷载,并求出了结构的最大失稳荷载和作用点位置的关系,说明了稳定是构件整体的问题。Superposition theory is not fit for the second- older analysis, considering geometrical nonlinearity on the internal force and deformation. So integer viewpoint is applied to the structural stability computation. Based on this the author produces a method which can put integer viewpoint into stability computation in small reduction scope. The paper takes the statically determinate frame as an example, and get the maximum forces using integer viewpoint when the force is at the different places on the crossbeam. Namely, we get the maximum force if the whole structure loses stability. At last we gain the relation between maximum forces and different places on the crossbeam. It explains that whole structure is very important to the stability,

关 键 词：几何非线性 稳定计算 叠加原理 

分 类 号：TU312[建筑科学—结构工程]