Effective Static Wind Load for Clips of Standing Seam Roof System

Abstract:

Detachment failure of clips from roof panels of standing seam roof system is a typical and often happened phenomenon in practice. A calculation method of effective wind loaded area for the clips under wind load is proposed considering the actual wind loaded area and the spatial correlation of fluctuating wind pressure on the roof surface. Based on wind load time series obtained from the synchronous multi pressure measurement on a rigid gable roof model, the finite element model for standing seam roof system considering wind load path in the roof system is established. By using a magnification coefficient in comparison with the widely used tributary area, the concept of effective wind loaded area is introduced to estimate the effective static wind load for the clips. It is shown that the wind induced forces for clips obtained from the proposed calculation method using the magnification coefficient can envelope the extreme values from dynamic time history analysis, and the expression of the method is very simple, which will be convenient in practical use.