Construction Monitoring,Simulation And Key Technology Analysis Of Large Span Cantilever Concrete Spatial Truss Structure

With the vigorous development of the our country economy and science and technology constantly updated,as an important symbol of national development and construction also ushered in the explosive growth,expansion,each country,city,in order to show itself to the world culture and the comprehensive national strength,promote the building structure design to the diverse and unique development gradually.At the same time satisfy the people to the double requirements of functionality and view and admire a gender.With the bird's nest,CCTV new sites,such as world financial center national landmark mind-set changed the building as a live,with its impressive performance conquered the world.Among them,such as large span cantilever structure,steel structure,frame structure are out of the conventional modes,such as the construction technology into a new area.Large span cantilever truss structure benefit from the increase of strength of materials and construction technology after decades of exploration and discovery,has gradually become one of the most common form of structure.Large span cantilever structure has its own characteristics:in space,can extends to outside;On material,steel structure and concrete are the most commonly used,however,large span cantilever concrete structure no matter which has great difficulty in design and construction.Therefore,the large span cantilever structure carried on some beneficial discussion is very useful.This paper introduces the development of large-span cantilever truss structure at the present stage,the structural characteristics and the structure of the building structure,and the basic knowledge of the cantilever structure.Then,according to the construction process,The finite element model was established to simulate the stress of the steel structure,the surface stress and the displacement of the concrete.The field data were collected and processed,and the simulation results were compared with the simulated values.The process of internal forces,deflection and other changes in the law.Demonstrate the safety and stability of the large cantilever concrete truss structure and improve the application ability of the large cantilever structure in engineering construction and design.