Wind Pressure Distribution Estimation Method For Curved Roof Structures Based On Wind Pressure Monitoring Values

The wind load is the main load or even the control load of the building structure.The time domain method is one of the main methods of wind-induced vibration response,but the wind pressure test points are provided in wind tunnel test,on-site measurement and health monitoring.Therefore,based on the wind pressure field distribution estimation method,the wind pressure data of the measured points should be fully utilized to obtain the wind pressure time history at the unmeasured pressure point.The research work in this paper is mainly carried out from the following three aspects:A method for determining the measured point of wind pressure considering the similarity.The wind pressure time-history similarity coefficient between the measured points is analyzed,and a similarity search sequence is generated based on the estimated values at the unmeasured points.Cross-validation is performed between the measured points to determine the applicable range of the similarity search sequence,and the search sequence at the unmeasured points is compensated.Combined with the error prediction value,the measured points included in the calculation are finally determined.Through the wind tunnel test data of the low house and the wind tunnel test data of Shenzhen Bay Sports Center,the validity of the wind pressure measurement point determination method considering the similarity in the wind pressure time history estimation is verified.Wind pressure distribution estimation method based on failure mode rejection.Based on the internal estimated efficiency value of the eigenvector at the measured point,the inverse distance weighted interpolation method is used to obtain the estimated efficiency estimation value at the unmeasured point.Comparing the estimated efficiency of the zero-value method and the inverse distance interpolation method at the unmeasured points to identify the distribution law of the modality in space,determine whether the modality is invalid,and determine the modality that is finally included in the calculation.Through the wind tunnel test data of Shenzhen Bay Sports Center and wind tunnel test data of low-rise houses,the effectiveness of the proposed method for estimating wind pressure distribution based on failure mode rejection is verified.Correction method for wind pressure distribution estimation of curved outer surface.Considering the anisotropy of wind pressure distribution,the expansion coefficient and the torsion coefficient are defined,and the distance correction between the points is given.The cross-validation method is used to determine the expansion coefficient at the measured points based on the error representative value.Based on the error prediction value,the expansion coefficient at the measured point is optimized.The inverse distance interpolation method is used to obtain the expansion coefficient at the unmeasured point,and finally the weight correction value when the measurement point is included in the calculation is obtained.Through the wind tunnel test data of Shenzhen Bay Sports Center,the effectiveness of the proposed method for estimating the wind pressure distribution on the curved outer surface is verified.