Impact Damage Probability Model of Building Roofs Impacted by Plate-Like Debris

Abstract:

The impact of windborne debris on buildings is one of the most important causes of envelope destruction in strong wind. To build an impact damage probability model considering multiple factors for different type of building envelopes， an impact damage probability model of plate-like debris based on the three-dimensional plate-like debris trajectory considering Magnus effect is proposed. Compared with the commonly used models， this model additionally considers the effects of parameters of debris including different sources， initial conditions and relative positions of buildings at different wind speeds and in different wind directions. An impact damage estimation of a low-rise building roof considering multiple factors is given using the wind speeds of 15 m·s^-1~45 m·s^-1， the wind directions of 0°~90°， and the upstream building heights of 8.0 m~12.5 m to verify the availability of the model. The calculation method of this model is simple and can be applied to the vulnerability analysis of building roofs.

Key words:windborne debris;impact damage probability model;plate-like debris;building roof;strong wind