摘要
结构稳定性的物理概念是开展结构抗屈曲概念设计及稳定性检算的基础。通过构造理想压杆稳定性分析的等效刚球模型,建立压杆直线位置扰动后状态与位于给定支撑面坐标原点的刚球干扰状态之间的联系,加深学生和结构工程师对弹性系统稳定性的直观理解。提出轴心受压构件在任意端部约束条件下静力稳定性判别的广义力增量准则,为多自由度系统扰动广义抗力及平衡稳定性提供物理解释,可用于判别结构非线性平衡路径中间状态的稳定性,并指明结构后屈曲平衡构型。
The physical concept of structural stability sets up the foundation for anti-buckling concept design and stability check of structures.The correlations between disturbed configurations of the initial straight column and a rigid ball initially settled in the origin of a given support surface have been established by developing an equivalent rigid ball model for the stability analysis of an idealized column.Such a model is designed to facilitate students and structural engineers to intuitively understand stability of elastic systems.Furthermore,an incremental generalized force criterion has been proposed to identify the static stability of axial compression member with arbitrary end constraints,which provides physical explanation to disturbance generalized resistance and equilibrium stability of a multiple degree of freedom system.It can be used to determine the stability of an intermediate state of a nonlinear equilibrium path of structures and to indicate the post-buckling equilibrium configurations of structures.
作者
文颖
陈泽林
WEN Ying;CHEN Zelin(School of Civil Engineering,Ministry of Education,Central South University,Changsha 410075,P.R.China;Key Laboratory of Engineering Structures of Heavy Haul Railway(Central South University),Ministry of Education,Central South University,Changsha 410075,P.R.China)
出处
《高等建筑教育》
2019年第1期68-72,共5页
Journal of Architectural Education in Institutions of Higher Learning
基金
国家自然科学基金项目(51108460
51478475)
关键词
钢结构设计
理想压杆
能量原理
扰动抗力
物理模型
广义力增量准则
structural steel design
idealized column
energy principle
disturbance resistance
physical model
incremental generalized force criterion
