摘要
在杆系结构几何非线性理论的基础上,推导了在空间状态随转坐标系下从t时刻到t+Δt时刻,空间梁单元的运动中能真正引起单元变形的那部分节点位移增量表达式.采用空间梁单元模拟高墩、大跨桥梁实际结构,用面向对象的VisualC++6.0语言,编制了具有可视化界面的空间梁单元几何非线性有限元程序,并对工程实例进行了全桥线弹性和考虑几何非线性的静力分析,并说明了其几何非线性的影响程度.
Based on the geometrical nonlinear theory of system consisted of bars, the formula of nodal displacement increment really causing the deformation of spatial beam element in its motion from t to t+Δt moment is derived in spatial co-rotational coordinate system. Spatial beam element is adopted to simulate the large-span bridge with high-pier. Finite element program with visual user-interface, which can treat geometrical nonlinear behavior, is developed by object-oriented language-Visual C^(++)6.0. A static elastic and geometrical nonlinear analysis of the whole bridge in practical engineering are carried out through this program. Furthermore, the influence of geometrical nonlinear behavior on bridge is illustrated.
出处
《长沙理工大学学报（自然科学版）》
CAS
2004年第2期28-33,共6页
Journal of Changsha University of Science and Technology:Natural Science
基金
交通部西部交通建设科技项目(200331882315)
关键词
高墩大跨桥梁
空间梁单元
几何非线性
静力分析
有限元程序
large-span bridge with high-pier
geometrical nonlinearity
co-rotational coordinate system
spatial beam element
finite element program
