Research Of Mechanics Emulation And Calculating Methods During Construction Process Of Complex Rigid Steel Structures

Along with the increase in China's overall strength and economic development, the direction of development of modern steel structure is high, big and complex. During the construction process in this complex rigid steel structure different construction procedures will lead to different internal force and deformation distribution. There is a great difference in internal force and deformation distribution between according to design model one time loading and according to step-by-step construction process. They have to be considered in the structural design and construction. It is necessary to analyze the construction procedures in order to making reasonable construction measures and guaranteeing the safety of structure during the construction and the internal force and deformation of the construction completed structure to meet the requirement given by designers. In this paper several calculating methods during construction process of complex rigid steel structures are intensively studied and get some new practical calculating methods. In several actual projects the new calculating methods are used to analyze the construction procedures according to the real construction process in order to finding the actual internal force and deformation and determining reasonable construction measures. The main research work in this paper includes:(1) According to the three positioning principles of structural components in bridge construction mechanics the 4th positioning principle is put forward for the general building.(2) According to the principles of element's"floating"for the direct element birth and death technology a new method named local configuration constraint birth and death element method is put forward to solve the question of element's"floating".(3) On the basis of the four existing pre-set deformation methods a new one named local configuration constraint forward iteration method is put forward to solve the question of element's"floating"in the forward iteration method.(4) In several actual projects the new calculating methods are used to analyze the construction procedures according to the real construction process in order to researching the application of those methods.1) Through the research of the key technical problems during the construction process in the project of Heshi Dagoba of Famen Temple, this paper discusses the application of the methods of mechanical emulation during construction process in this kind of complex tall building.2) Through the analysis of mechanics emulation during construction process of the main palaestra of the world university games, this paper discusses the application of the calculation methods during construction process in this kind of complex big span steel structure.3) In construction of the steel roof of the Guangzhou New Baiyun International Airport Maintain Garage a computer-controlled multi-suspension-centers hydraumatic synchronizing lifting construction technology was adopted. This paper considers the displacement difference and the mechanics emulation of the lifting points to analyze the lifting process and find out how to estimate the influence of the displacement difference of the lifting points.