Study Of The Static And Dynamic Characteristics Of Ribbed Cable Dome

Cable dome structures, composed of both cable in tension and struts in compression,are a kind of flexible structures in tensegrity. On the basis of being prestressed to provide geometric shape and structural stiffness. It is the greatest characteristic of the structure that the deformation of structure and distribution of prestress will change along with the load.thus its ability of bearing external force will change gradually.This type of structures, featuring in big span, light weight, economic cost, reasonable stress, ingenious design and various structural styles, etc. These characteristic make cable dome stand out in the large-span space structures and has won the highly valued in recent years. The most classic structure form of cable dome is GEIGER and LEVY, also called ribbed type and union square type, in addition, there are Kiewitt type, mixed type and the bird’s nest type. Cable dome structures have been practiced in real projects and and achieved good application effect and have therefore been mature in both theoretical researches and practical experience.In this paper, the research content are as follows:(1)First of all, based on the relevant references both in China and abroad, this article reviews cable dome structures in its developing history, the classification and structure characteristics of cable dome, and the existing conditions of both domestic and foreign researches in this area. Combined with the characteristics of ribbed cable dome structure, the first chapter outlines the main research contents and research methods of this article.(2)The analysis of static behavior of cable dome includes two parts. The first part aims to trace loading process, where variation law of axial force of each link and load-displacement curve of node are determined. The second part concerns parameter analysis, investigating their effects on the variation law of axial force of each link and load-displacement curve of node that below the center of the structure.These parameters include cable prestress,link area,structure height,strut length and structural span.(3)When analysis the dynamic properties of cable dome structure,its respective characteristic of self-vibration frequency and vibration types is firstly studied.Then, the following chapters concerns parameter analysis, these parameters are those mentioned above.(4)In addition, this article also concerns the earthquake time-history analysis. Then in the part of anti-seismic performance,horizontal seismic wave,vertical seismic wave and 3-d seismic wave have been chosen and input for time history analysis under frequent earthquakes, resulting in the structureresponse of displacement and internal force.(5)To optimize the model,then analysis the static and dynamic properties of cable dome structure.(6)In the end,the study work of this article was summarized,and the problems need to be solved in the ulterior research were indicated.