Large Span Steel Truss Structure Wind Load Numerical Simulation And Health Monitoring Research

The development of large-span spatial structure is one of important symbol for a measure of a country’s building scientific and technological level, the large span steel truss structure has the advantage of complex space form, large span, light weight, etc. favored by more and more. Large-span spatial steel pipe truss structure is widely used in all kinds of large sports venues, theaters, convention and exhibition centre, airport terminals, and other important landmark building, is the new material, new science, new technology for the integrated technology of modern civilization.In the large span space structure behind the prosperity, there also exist certain security risks, implement health monitoring for large-span spatial structure is important; Also because of the large span space structure is sensitive to wind load structure, under the wind load, examples of large span structure damage is very rare, provided-based on the ANSYS CFX for computing platform, structure of large span space structure numerical wind tunnel simulation.This article use Xining Haihu gymnasium as an example, the main work is as follows:(1) Using the gym health monitoring project, extract the gym in the whole construction process of stress and displacement monitoring data, the comparative analysis of the structure in the construction load and late stage of the change rule of stress and displacement, it is concluded that the key link of stress and displacement increases gradually along with the construction load, stable.(2) The stadium roof structure in CFD numerical simulation of numerical wind tunnel under wind load, select the appropriate boundary conditions and initial conditions and calculation parameters, the fractal numerical wind tunnel simulation, get the size of the numerical value of the wind pressure, flow and wind speed in the domain of fluid flow, and the average wind pressure coefficient distribution in the windward and leeward surface structure.(3) On the stadium roof model under different conditions of numerical wind tunnel simulation of RNGA κ-ε, SST κ-ω, BSL-RSM and SSG-RSM turbulence model of four different, and in different surface roughness (class B and class C) and under different sizes of the computational domain, it is concluded that the stadium roof on the surface of the distribution law of average wind pressure coefficient were analyzed.