The Space Beam Element Applied In The Cable-Membrane Structure

This current paper is mainly concerted with the the fundamental theory of space-beam geometry nonlinearity , and obtains the nonlinearity ansysis program , some space structures with beam elements are is studied by the program . on this base , we carry work analysis on Cooperative Form Finding Analysis of Cable-Strut-Beam -Membrane Structural System,Moreover ,this paper compares and analysis some membrane restoration project.In the original the fundamental theory of space-beam geometry nonlinearity is carefully researched .The author firstly studies a tangent stiffness matrix of the space beam element in elastic Large-displacement analysis considering the influence about other multi-factors, and establishes the nonlinear equilibrium equation of the space structure, induces a new tangent stiffness matrix which accord with common condition.On the basis above,a geometrically nonlinear analysis program that adopted the Incremental Iterative method is obtained, it can satisfactorily solve the problems in tracing structural pre-kuckling equilibrium path and can simultaneously analyze the problem about linear stability, Moreover ,this paper studies the related program arithmetic and adjust the subroutine , which aims to deals with structure with the complex constitution.Incooperative and cooperative analysis method are the two main reaserach method on CSBM ,and Many research works on CSBM rely on incooperative form finding analysis method.There is no much research work on cooperative form finding analysis so far.one aim of the program is to study CSBM Structural System,thus, this research studies the the basic fundamental theory of CSBM ,proposes Extending -theory of reducing - theory of the CSBM matrix, and carry out the CSBM analysis program.from examples some important conclusion can be obtained.In addition,this paper analyses restoration design project of some membrane structure in Zhe Jiang Province.this accident project broke out in the'Kar-Luo" typhoon..some advice is proposed after the analysis of the accident,moreover,we examine this restoration design project by incooperative analysis method of the CSBM. By Form Finding Analysis.load and Analysis of the membrane and of the steel structure ,some instructive conclusion have been gained.which provide the reference datas for the perfect of the membrane structure.