EQUIVALENT STATIC WIND LOADS OF FLUCTUATING WIND ON LARGE-SPAN ROOFS BASED ON EIGEN-MODE COMPENSATION

Based on the pressure measurements of wind tunnel test on a rigid model,this paper first compensates the eigen-modes of fluctuating wind loads with the covariance proper transformation(CPT) technique according to multiple equivalent target responses induced by the fluctuating wind loads.Then,a new computational method was proposed to calculate the equivalent static wind loads(ESWL) of fluctuating wind loads on those linear and complex large-span roofs.At last,the new method was applied to a real engineering project.The results demonstrate that the new method has the merits of explicit physical meaning,simple computational principle and high computational accuracy;it can also effectively avoid the defects in former traditional methods of computing the ESWL and can satisfy the requirements of engineering design.