Study On Design Methods Of Steel Structure End-plate Connections

Because the constitution of end-plate connections is complex, there is no method that can calculate intensity and stiffness exactly and widely now. It is so conservative to design as current ways that it can waste materials.The model analysis of many nodes is studied using ANSYS program in this dissertation. By the analysis the work is done in this dissertation including the regularity of nodes' stress and displacement, improving the method to calculate intensity and stiffness and summarizing a new way to design nodes. There are four parts:1. Introduction: generalizing the constitution, classification, feature and actuality about end-plate.2. Research on the intensity of end-plate connections: first, by analyzing the bearing feature of the whole connections, the conclusion that the moment is the principal load to nodes and the intensity of bolts are the principal factors affecting whole strength is obtained; second, the allocation model of the bolts in different areas and the calculation formulae of bolts' strength are presented; finally, the formulae that calculate the size of end-plate and panel zone are given after analyzing the bearing feature about them.3. Research on the stiffness of end-plate connections: the semi-rigidity of connections has an important influence in structure. So it is necessary to carry through further research on rotation stiffness. In addition, it is found that the thickness of end-plate and column-web is most sensitive to stiffness after analyzing the influence regularity of various factors on the stiffness of connections. The simple model and formula are given in the end of this part.4. Design methods of end-plate connections suggested by this dissertation: The methods designing end-plate connections are put forward. Then it is proved that the theory and method given in this dissertation is accurate and credible by proving the design methods preamble with a case history.