An efficient approach to the determination of Equivalent Static Wind Loads

Abstract In this paper, a novel approach to the determination of Equivalent Static Wind Loads is presented. The envelope of the effects on the structure, representing the design load for each structural member and obtained by means of a complete buffeting analysis, is reconstructed, in a least square sense, by considering a series of statically applied load conditions. Such load conditions are obtained by combining Principal Static Wind Loads which, in turn, are obtained by means of the recently introduced Proper Skin Modes. By considering a smoothed version of the maximum/minimum operator, efficient, gradient based, optimization algorithms can be used in order to drive the least square minimization which conduces to the identification of the most significant wind load conditions. Such load conditions, statically applied, can be used in order to fully characterize the effect of the wind on the structure with very good approximation. No hypotheses are introduced regarding the shape of the envelopes, so rendering the procedure of general applicability. Very good results in terms of reconstruction rate and accuracy are obtained on a low-rise and a high-rise buildings.

[1]  M. Kasperski,et al.  Extreme wind load distributions for linear and nonlinear design , 1992 .

[2]  Francesco Ubertini,et al.  An efficient approach to the evaluation of wind effects on structures based on recorded pressure fields , 2016 .

[3]  Vincent Denoël,et al.  Principal Static Wind Loads on a large roof structure , 2012 .

[4]  Svend Ole Hansen,et al.  Wind Loads on Structures , 1997 .

[5]  Vincent Denoël,et al.  Principal static wind loads , 2013 .

[6]  Ming Gu,et al.  An approximation method for resonant response with coupling modes of structures under wind action , 2009 .

[7]  D. Prevatt,et al.  A comparison of methods to estimate peak wind loads on buildings , 2014 .

[8]  Kai Chen,et al.  Applications of Generalized Coordinate Synthesis Method in Wind Engineering , 2013 .

[9]  Yukio Tamura,et al.  Universal wind load distribution simultaneously reproducing largest load effects in all subject members on large-span cantilevered roof , 2007 .

[10]  Alan G. Davenport,et al.  How can we simplify and generalize wind loads , 1995 .

[11]  R. Clough,et al.  Dynamics Of Structures , 1975 .

[12]  Ledong Zhu,et al.  Covariance proper transformation-based pseudo excitation algorithm and simplified SRSS method for the response of high-rise building subject to wind-induced multi-excitation , 2015 .

[13]  Ahsan Kareem,et al.  EQUIVALENT STATIC WIND LOADS FOR BUFFETING RESPONSE OF BRIDGES , 2001 .

[14]  Yukio Tamura,et al.  Actual extreme pressure distributions and LRC formula , 2002 .

[15]  Jm M. Ko,et al.  Pseudo-excitation method for vibration analysis of wind-excited structures , 1999 .

[16]  J. D. Holmes,et al.  Distribution of peak wind loads on a low-rise building , 1988 .

[17]  Gregory L. Fenves,et al.  Simplified Earthquake Analysis of Concrete Gravity Dams , 1987 .

[18]  Fei Wang,et al.  A Method for Estimation of Extreme Values of Wind Pressure on Buildings Based on the Generalized Extreme-Value Theory , 2014 .