Spatial structure is a appropriate shape that resists external force only with inplane force by reducing the influence of bending moment, and it maximizes the effectiveness of structure system In the foregoing study, we collected basic datum about spa...
Spatial structure is a appropriate shape that resists external force only with inplane force by reducing the influence of bending moment, and it maximizes the effectiveness of structure system In the foregoing study, we collected basic datum about spatial structures and classified them, also, we studied analytic theories and analytic mechanisms from many reports and systematized them. We deal with modeling of member and joint, formulation of governing equation and theory of direct and indirect analysis method for non-linear analysis. Particularly, arc-length method will be explained in detail. We formulate governing equation by generalized coordinate of mode supposition method and discuss selection and effectiveness of natural mode We discuss basic principle of truss stabilized by the cable tension applied at upper part of spatial structures and analysis of unit model with self-equilibrated axial mode of that, and deal with stress displacement analysis, shape and deformation control theory for shape analysis. We collect the data and analyze the system through this study which examines general remarks of existing spatial structures and researches its examples. In the second-year study, ?we focussed on the developing of analytic algorithms and programs on the basis of the results from the forgoing study. Also we made modeling analyses, examined their results and studied their utilities. ?we examined the dynamic characteristics and made time-history analysis of the single-layer latticed domes under earthquake motion, through the development of the dynamic algorithms for the spatial structures. ?we carried out the elasto-plastic analysis of the single-layer latticed domes as the application of the plastic concept in member modeling and yielding condition, and supposed the method to calculate buckling load as using LRFD. ?it is essential to know the elementary data such as nodal coordinates, external force, member properties and so on, for the analysis of the spatial structures, therefore, an algorithm was developed to find the regularity of the system and change them to analytical data quantitatively. 톣e confirmed analytic theories to decide the optimized shape of truss structure using inverse method which the displacements of the structures is prescribed and examined the effectiveness of the analytic program. ?it was supposed to find the stabilization algorithms of unstable structures and the optimal shape of cable dome with initial tension using stabilization method of unit truss, and examined its effectiveness. As we have seen, we made an basis on the spatial structures. The static, dynamic analysis and programs from the forgoing study would make us construct the spatial structures.