Optimization Study On The Construction Scheme Of The Long-Span Steel Truss Cultural Relic Exhibiton Hall

Since the second industrial revolution,long-span steel structure building has developed rapidly.Nowadays,with the continuous improvement and innovation of construction technology,large-span spatial structure has occupied an important position in the field of architectural engineering with its complex structural system and various construction forms.Large-span spatial structure is often used in exhibition venues,transportation hubs,sports venues and other architectural forms with special requirements for space,especially cultural relics exhibition venues,which have the particularity of cultural relics protection,exhibition and cultural exchange.Generally,it is designed as large-span steel structure without intermediate support.This kind of architectural form also puts forward higher requirements for construction technology.How to choose the optimal construction scheme on the basic of comprehensive of cultural relic safety,shortest construction period,reasonable economy and other factors is the key to the successful implementation of such buildings.On the basis of extensive reference to the relevant literature,this paper summarizes the research status of the comparison and optimization of the construction scheme of the large-span spatial structure,and analyzes the construction method of the large-span spatial structure.According to the concrete project of large-span steel structure cultural relics exhibition hall,the characteristics of the project are analyzed and summarized.By using the entropy weight-double base point method,a construction scheme evaluation model based on six dimensions,namely,economy,safety feasibility,technical feasibility,quality controllability,site implementability and impact on cultural relics,is constructed.Through the comparison and analysis of common construction methods of large-span space structure,two construction methods suitable for this project are preliminarily selected,and then the construction scheme is demonstrated from the aspects of equipment selection,structure partition,construction period,etc.,and the high-altitude sliding construction scheme is selected based on the principle of optimal economic benefit.In order to ensure the reliability of the construction scheme,the whole process of sliding construction is simulated and analyzed.the structural improvement scheme is put forward in view of the existing problems of deformation and stress over-limit in the construction.The whole process of sliding construction of the improved structure is simulated again,and the traction force required in the whole process of sliding construction is accurately calculated with the support reaction force,which verifies that the improved structure is safe and reasonable in the process of sliding construction,and provides a reference for the construction of similar projects.