Mechanics Analysis On Whole Construction Process For Large Span Space Steel Structures And Research On Some Key Problems By The Influence Of Erection

There are many erection methods of large span structures some of what is very complicated,so the distribution of internal force of structures is intricate and alternative.We should determine the reasonable order during the process of erection to make sure the engineering construction go safe and economical.It is necessary to simulate the whole erection process of large span steel structures to make out the mechanics property of structures and study the relevant problems during this process.The research background of this paper is the erection engineering of steel roof structure of Nanjng olympic game centre stadium.This paper do mechanics analysis of space structures and put forward the solve scheme of some influence factors during erection process,verify the theoretical studies and the analysis of finite element by means of the construction practice. This paper apply the advanced tech in the field of civil engineering to the construction of large space structures to shorten the period of eraction,to ensure the quality and to save th invest and to enhance the building level.The main content of this paper is briefly summarized as follows:1.Research on the mechanics theory of large span space structures during the process of erectionThis paper point out the control factors and establish the steps of the mechanics analysis of large span steel structures during erection process. Paper derive the formula of construction process mode variable superimposed method and sub-structure matrix displacement method by means of mechanics theory of time-varying structures,summarise some practical algorithm of erection mechanics.Creat the calculation program block diagram of two stretch analysis methods of prestressed steel stuctures and construct calculate example from actual engineering to compare the two algorithm.2.The static force analysis during simulating erection process of the steel roof structure...