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Shape Optimal Design Of Pre-Stressed Steel Structures Based Evolutionary Method Of Nodes

Posted on:2005-12-30Degree:MasterType:Thesis
Country:ChinaCandidate:H J YangFull Text:PDF
GTID:2132360122991223Subject:Structural engineering
Abstract/Summary:PDF Full Text Request
Pre-stressed steel structure is a new type structural system and has been widely used in all kinds of buildings such as bridge,factory workshop,sport building and SO on.Optimal design for the pre-stressed steel structure not only plays a part of economizing steel,reducing cost,improving load bearing of structure,but also creates a new type structural system.Thus it can enrich and develop the theory of pre-tressed steel structure,take directive function of engineering practice of pre-stressed steel structure.     The research content of this paper is a part of the National Natural Science Foundation of China.It studies the optimal design of section size and of structure shape including optimization of cable loads aimed at laying cable pre-stressed steel structures.     In aspect of section size optimization,the paper founds the relevant math model considering constraint conditions which satisfy the demands of design in the stage of appling pre-stress and the stage of appling pre-stress and loads.The model includes two kinds of design variable:pre-stress and section size.The paper advances a new solve method.In the method,we should determine the pre-stressed loads,and then select the section size of structural components through fully stress method.It'S demonstrated that the method is simple and effective by the examples.The method is the basis of shape optimization of pre-stress steel structure in the paper.     Shape optimal design of pre-stress structure is the main content in the paper,It is divided into three parts:location optimization of laying cable,shape optimization of structure,shape optimization thinking of laying cable location.For each part,math model is founded respective,and for each model,it includes three kinds of design variable:pre-stress,section size and location of nodes.In order to solve the problem, the design variables are divided into two sub-spaces:the frist is pre-stress and section size optimization design space and the second is shape optimization design...
Keywords/Search Tags:pre-stressed steel structure, the section size optimization, the shape, optimization
PDF Full Text Request
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