Structural Safety Analysis Of Cantilever External Shading Components Of Buildings Under Extreme Wind Environment

The strong solar radiation intensity and long sunshine duration in Turpan area have led to the necessity of building shading construction.In extreme wind conditions,safety analysis is required.Sun-shading components can effectively block direct solar radiation and secondary heat gain of buildings.Through analysis of the importance and sensitivity of sun-shading components,the sensitivity of sun-shading components accounts for about 60%of the total.At the same time,the change in the length of the sun visor has an important influence on the ratio of air conditioning energy consumption and space comfort.When the length of the sun visor reaches the interval of 0.6m-0.8m,the sun visor can effectively reduce the energy consumption of the air conditioner and improve the indoor thermal comfort,so as to achieve the building The purpose of energy saving.This study is based on Ansys numerical simulation for analysis,Fluent is used for fluid field analysis,and Mechanical is used for solid field analysis.The calculation process uses the finite volume method.Among them,the turbulence model of the fluid field is the standard k-epsilon model,and the solid field calculation uses the finite element method.Through the workbench platform,using fluid-structure coupling technology,the wind field is imported into the solid field,and the Fluent flow field（pressure field）calculation results are read by Mechanical,and the equivalent stress,strain,maximum principal stress,and principal elastic strain are calculated.,So as to complete the structural safety analysis of the wind load on the sunshade components.In this study,the maximum principal stressδmax and the maximum principal elastic strainεmax under 10 working conditions were solved through the analysis of different building orientations,different wind attack angles,and different shading forms.The stress is 0.39 MPa,which is much smaller than the tensile strength of C25 concrete.The calculated maximum principal elastic strain of the sun visor is 0.12×10^-4,which is much smaller than the maximum strain of concrete.Therefore,the wind load under the working conditions of this study has no significant impact on the structural safety of the concrete sun visor.Through the analysis of the sun visor under various working conditions,the original reinforcement plan is obtained,and different optimized reinforcement plans are obtained through the analysis,and finally the south-facing horizontal sun visor is given under different working conditions to comprehensively consider the root encryption and The two-way reinforcement form gives the north-direction vertical sunshade components to concentrate the root dense reinforcement form,which proves the structural feasibility of the building shading components in Turpan area,and provides reference suggestions for the practical engineering of cantilever components in Turpan area in the future.