| In order to meet the needs of China’s economic and social development,large-span steel structure roofs have been widely used,and diversified construction methods have also been formed.The high-altitude sliding method is widely used in the construction of large-span steel structures due to the short construction period and the small influence between the processes.Sliding rails have higher requirements on the structure of the lower support system.Due to the diversity and particularity of the building,the lower support structure may not fully meet the needs of sliding.Based on actual engineering cases,this thesis studies the application of cumulative slip technology under the deflection of slide rails and structural beams.The research results can provide references for similar projects.The paper introduces the application status of steel structure engineering and various steel structure construction methods,and lists relatively well-known actual engineering cases,focusing on the slipping construction method in detail.Through the retrieval of domestic and foreign documents,the application of slipping construction methods in various practical projects is summarized.With the actual engineering application as the background,a brief introduction to the construction technology and construction process of the project is given.Using finite element analysis software,the steel structure roof model was constructed,and its mechanical properties during the sliding construction stage and roof unloading stage were simulated and analyzed.In view of the deflection of the sliding rail and the structural beam in the actual project,the research is carried out,and three solutions are listed,and the best solution is determined through analysis and comparison.Finally,the construction technology during the unloading process of the steel roof and the unloading monitoring of the main supporting system are analyzed,and the monitoring data are compared with the theoretical values.This article summarizes the construction techniques of the cumulative slip construction of large-span steel structures,including the solution of major and difficult problems in the construction process,the determination of the slip method,the unloading technology of the overall structure after the end of the slip,and the monitoring during the unloading process;use MIDAS The GEN finite element analysis software simulates and analyzes the mechanical properties of the eleven sliding construction phases and the mechanical properties of the mid-span support system during the unloading process;for the special structure of the slide rail and the structural beam deflection,the column side profile steel cattle Compare the three solutions of leg assistance,column side rectangular parallelepiped concrete block assistance,and other section steel structure assistance,and determine the column side section steel corbel as the most reasonable solution.Comparing the monitored deformation value with the theoretical deformation value during the unloading process of the mid-span support system,the results show that the monitored deformation value is less than the theoretical deformation value,which meets the requirements of safe construction.Theory and practice have proved that the sliding technology under the deflection of the slide rail and structural beam studied in the thesis is reasonable and feasible,and the research results can provide reference for similar projects. |
