|
In the field of industrial engineering, to meet the functional requirements of functionality and bearing, steel truss structure used widely, the structure has greater flexibility, higher precision installation characteristics, structural deformation control is even more important. The design theory mature, but the construction methods and construction accuracy to be further improved. This paper discusses the segmentation hoisting technology in the application of large-span steel structure, respectively, discussed the production of large-span steel truss analyzes the principle of sub-lifting, lifting points hanging high selectivity, lifting the analysis of working conditions, and Chongqing 811 project, for example, illustrates a typical large-span steel truss segment Lifting Technology. Include the following elements: 1, the production of large-span steel truss span and processing based on steel truss for the main ideas of the production process, focusing on the steel truss plate production process, assembly process, welding technology and the overall pre-assembly process, namely discusses the key points of its important technical and control methods. 2, large span steel truss segment lifting construction technology of steel truss segment lifting construction process, based on a detailed set forth above segmented steel truss division, transport and stacking components, component assembly, component lifting, welding and other construction installation processes, as well as the deformation of steel truss welding control method and discusses the steel trusses measurement and monitoring techniques. 3, steel truss hanging high satisfaction choose to apply objective function method, a lifting height change and Sheng Suosuo force mathematical relationship model to analyze the objective function is the best choice when the range, the ideal number of steel truss lifting height to take range, relying on past experience to solve the problem of high lift drawn. 4, steel truss hanging point setting research based on strain energy principle: do no work on changing the structure of the different constraint points, structural unit strain energy will also change, proposed strain energy method is applied to four lifting points hoisting steel truss construction, in order to steel truss combination of different four lifting points as variables for the strain energy of ANSYS software, numerical simulation analysis, calculated at the minimum strain energy combinations of four hanging points combined, analyzed and the structural unit member forces and nodal displacements are in a relatively reasonable state, so the lifting point constraint combinations can be considered the best combination of hanging points. 5, 811 engineering examples with Chongqing West Wing Microelectronics Park Project, systematically expounded the large span steel truss segment installation process, using the MIDAS software, a detailed analysis of five kinds of working conditions under construction span steel truss segment stress Erection contingency situation, and to verify the selection and hanging hanging high point setting a reasonable and scientific. For the promotion of the theory of perfect staging lifting techniques and safety has important practical significance.
|