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空间框架的计算,过去一般简化为平面框架进行分析,这样不能充分考虑实际结构的空间作用,往往导致设计不够经济合理,因而有必要研究空间框架的精确计算.为了能正确计算空间影响较强的任意杆系的地震力,本程序采用了考虑剪切变形影响的单元刚度矩阵和带刚性域的单元刚度矩阵的转换,从而较正确地反映了空间任意杆系的刚度阵.本程序为了节省内存,总刚度阵采用变带宽一维存储,总质量阵采用了“质量约化”导概念.编制了动力子结构子程序,可以将结构物分成两个部份进行计算,从而达到小机器算大题目的目的.本程序除根据“工业与民用建筑抗震设计规范”中确定地震荷载及内力的一般方法来计算结构物的地震荷载及其产生的组合内外力,还附有直接输入地震波的弹性直接动力法计算结构的地震力.
In the past, the calculation of the space framework was generally simplified to the analysis of the planar framework. This can not fully consider the spatial effects of the actual structure, and often leads to the design being not economically reasonable. Therefore, it is necessary to study the precise calculation of the space framework. In order to correctly calculate the spatial influence For any rod system seismic force, this program uses the unit stiffness matrix considering the influence of the shear deformation and the unit stiffness matrix transformation with the rigid domain, so that the stiffness matrix of any space system is correctly reflected. This program is to save memory The total stiffness matrix uses variable-bandwidth one-dimensional storage. The total mass array adopts the concept of “mass reduction”. The substructure of the dynamic substructure is compiled. The structure can be divided into two parts for calculation, so that the small machine can be considered as large. The purpose of the problem. This procedure is based on the general method of determining seismic loads and internal forces in the “Code for Seismic Design of Industrial and Civil Buildings” to calculate the seismic load of the structure and its combined internal and external forces. It also includes the direct and direct input of seismic waves. The dynamic method calculates the seismic force of the structure.