论文部分内容阅读
在进行结构计算时,一般采用主从节点法或是刚性材料法来处理节点刚性区问题。主从节点法往往高估节点区的刚度,刚性材料法则很难确定连接单元的几何、物理参数。该文以细长梁的平截面假定为依据,构建连接节点局部有限元模型的边界节点与整体结构有限元模型相应节点之间的约束方程,将连接节点局部三维实体(壳)有限元模型与整体结构空间杆系有限元模型相结合进行数值分析。采用此方法对一座多重组合体系拱桥主副拱连接节点的刚度进行识别。分析表明:对连接节点柔性行为的模拟可以使整个结构的计算结果更加精确。
In the structural calculation, the general use of master-slave node method or rigid material method to deal with the problem of rigid node area. Master-slave node method often overestimate the stiffness of the node area, the rigid material law is difficult to determine the geometry and physical parameters of the connection unit. In this paper, based on the assumption of flat section of slender girder, the constraint equation between the boundary nodes connecting the local finite element model and the corresponding nodes of the finite element model of the whole structure is constructed. The finite element model of connecting local three- The overall structure of the spatial linkage finite element model for numerical analysis. This method is used to identify the stiffness of the connection node between the main arch and the main arch of a multi-component arch bridge. The analysis shows that the simulation of the flexible behavior of joints can make the calculation of the whole structure more accurate.