Study On The Structure Of The Reciprocal Large-span Airport Building

In airport buildings,span and monomer scale is usually very large because of the functional requirements of the terminal and hangar,and the lattice shell lattice and other spatial structures are often used as a form of roof structure.But in engineering practice,traditional spatial structures emerge some problems.By contrast,reciprocal structure has its unique advantages because of its special structure.So this paper is carried out from the three aspects of the reciprocal structure,which are geometric construction method,assembly node design analysis and the mechanical property,which is divided into:(1).Taking the hexagon-trihedral reciprocal structure as the research object,then the formula for calculating the nodal coordinates of the basic elements of the hexagon-trihedral reciprocal structure and the method for calculating the direction vectors of the components are derived.The naming rules of basic units,components,and nodes of the hexagon-trihedral reciprocal structure are proposed,and the rule of the structure composition is analyzed.The modeling method of hexagon-trihedral reciprocal structure is established,which takes the basic unit as a component,then the basic unit is assembled in a ring along the central basic unit to form a whole.(2).Assembly construction is very strict to the build and construction error requirements,and should try to avoid the site welding simultaneously.Taking this as the main design objective,an assembled node with good tolerance for error and large stiffness which is suitable for the components overlapping with each other is proposed.In the construction process,the nodes only need to be connected by bolts,and can adapt to certain build and construction errors in the three directions of the space.Then the mechanical model of the node is obtained through numerical analysis,and it is applied to the numerical model of the set of structural components.Finally,the feasibility of the numerical analysis result of the node and the basic element modeling method is verified by comparison with the field test.(3).Through the geometric model of the whole structure obtained in the first part,the ABAQUS finite element analysis software is used,and the mechanical model of the nodes obtained in the second part.Then the numerical model of the whole structure is established based on beam elements and connectors.The static and dynamic performance of the whole structure is further analyzed.