Study On Stability And Numerical Simulation Of Wind-Loading Of Arch-supported Latticed Groined Barrel Vault

Arch-supported latticed groined barrel vault is a type of structure coupled arch with latticed groined barrel vault. There are several kind of methods of meshing this kind of structure. In this paper, the merits and drawbacks of two major methods are discussed. An meshing optimization are put forward, and programs are developed to implement it. To single-layered latticed groined barrel vault, the stability is much more important. Non-linear FEM is used to study the geometrically non-linear buckling behavior of structure. Calculation results indicate that the stiffness of arch is an important factor for stability of arch-supported latticed groined barrel vault. The Lateral stiffness of crossed arch is the most important factor for structure design. Additional, using two-layered grid structure in the brink of structure would improve the stability of structure.Wind load has great effect on the mechanics behavior of open-wide-span spatial structure with complex shape. Numerical wind tunnel technology based on computational fluid dynamics is an effective method for the study of the wind field. In this paper, wind pressure distribution under the action of multi-angle wind load were simulated basing on the standard k- e closure turbulence model, and the shape coefficient of net wind pressure were obtained. Calculation results indicate that the major negative pressure of this kind of structure bearing wind load mainly concentrates on the brink of ridge; the brink of ridge and the groined arches of valley are the the most important region for structure design.