Research And Comparison Of Large-span Open-air Grid And Open-air Sandwich Panel Floor System

This paper focuses on the analysis of long span Vierendeel grid and fasting clamp plate in the floor structure system in mechanical properties, indicating that the vierendeel truss and Vierendeel Sandwich Plate in the floor structure system in excellent, good mechanical properties and can be applied in all kinds of engineering practice.The introduction of this paper first introduced the during the development of the large span hollow structure, classification and the corresponding mechanical characteristics, which leads to the large span Vierendeel grid and Vierendeel Sandwich plate floor the two new space structure system, and a brief summary of the significance of this topic and the main contents.The second chapter mainly introduces the composition of the basic structure of large span hollow type floor, briefly introduces the vierendeel truss and fasting clamp plate of several calculation methods, detailed introduces the reinforced concrete Vierendeel grid and fasting clamp plate floor analysis method, and introduces the theory of the stability analysis. The third chapter mainly on reinforced concrete Vierendeel grid and fasting clamp plate floor of eigenvalue buckling, geometric nonlinear buckling and considering geometric and material double nonlinear buckling analysis considering and the structural height, thickness of skin plate and upper and lower ribs height parametric analysis. Chapter four mainly for steel vierendeel truss and steel hollow clamp plate limit bearing capacity were studied and T type steel flange thickness, web thickness, shear connectors and a vertical rod thickness were parametric analysis, it is concluded that the influence of various parameters on structural ultimate bearing capacity. The fifth chapter briefly introduces the theoretical analysis in support of the problem, and according to the related theories, using the constraint of hinged support and fixed support two different forms of constraint, on the limit of reinforced concrete hollow structure and steel hollow structure bearing capacity analysis, draw different support constraints on the structure.The results showed that the span Vierendeel grid and fasting clamp plate floor structure not only has good mechanical properties, and surrounding large column net structure can meet the internal free space distribution requirements, bear the load could meet the requirements of engineering practice. Finally, this paper makes a summary, and makes a prospect, and puts forward some suggestions for further research.