Study On Wind Induced Disturbance Effect Of Regular Layout Floor-to-front Slope Houses

Floor-to-floor houses are widely used in civil and military fields.Due to their lighter weight,the houses are sensitive to wind loads.At present,most of China’s research on such low-rise houses is focused on monomers,and research on groups is also concentrated on high-rise and super-high-rise buildings or low-rise buildings of different shapes.At the same time,China’s current code "Building Structure Load Code"(GB50009-2012)has not yet given the wind load carrier shape factor for this type of building group.The group often uses a single wind load carrier type factor with similar shape in wind resistance design.There may be some safety hazards,so it is necessary to A large number of four-sloping houses on the ground are studied for wind-induced interference effects,and a reasonable layout plan for the houses is obtained to improve the economics of engineering applications and ensure the safety of the housing structure,so that they have good theoretical significance and engineering application value.In order to study the wind-induced interference effect of the four-slope houses on the ground,based on the basic theory of atmospheric boundary layer and the basic theory of computational fluid mechanics,using finite element analysis software and TTU wind tunnel simulation test,after a lot of trial analysis and discussion,it is determined to be suitable for low Key parameters and techniques such as grid type,grid number,calculation domain size,discrete format,turbulence model,solving algorithm,and convergence criteria for numerical wind tunnel simulation of buildings.According to the relevant use requirements and regulations of the four-slope housing group,the design of the housing group is a 3×3 regular layout,with 3 wind direction angles(0°、45°、90°),and 5 horizontal density factors(0.5、1、1.5、3、5),5 longitudinal density coefficients(0.5、1、1.5、3、5),a total of 75 working conditions are numerically simulated,and the wind pressure distribution law of each surface of the target house in the group is obtained,and Introduce interference factors to quantify the research on wind-induced interference effects of houses,and obtain wind load carrier coefficients suitable for wind resistance design of regular layout four-slope houses,and thenput forward a reasonable layout plan.The results show that the numerical simulation research method is feasible,economical and time-saving when studying the wind-induced interference effect of low-rise buildings under multivariable and multi-operation conditions.Under the regular arrangement of house groups,the houses in the corners of the group are greatly affected by the interference effect.The interference between houses is negatively related to the house spacing,when the house length or width of 0.5 times is the house spacing,The wind pressure on the surface of the house is the largest,and the wind-induced interference effect cannot be ignored.When the distance is greater than 1.5 times the length or width of the house,the wind-induced interference effect tends to be stable.When the distance is close to 5 times the length or width of the house,no matter what wind direction angle The interference between houses has basically disappeared.