Structurally Effective Static Wind Loads for Roof Panels

Current and Future Directions for Wind Research at Western: Disaster Mitigation and the 'Three Little Pigs' Project

“…The idea of spatially-varying loading using wind tunnel data was first developed by Mississippi State University (MSU) using magnetic actuators to provide the load 7) , based on wind tunnel experiments performed at UWO. The current experiment combines these two ideas into a single system.…”

“…However, it is not clear how residential structures respond to such rapid load changes, but the PLA test method allows for these effects to be determined and contrasted with standardized, static load tests. In this regard, there is not always a need to use either real or design hurricane wind speed time histories; rather, a portion of it could be used, or, in other words, a steady mean wind speed could be used to obtain the pressure time history (as was done by Surry et al 7) ). Most low-rise structures exist in suburban terrain with other nearby houses and structures, as well as trees and vegetation.…”

Full-scale testing of low-rise, residential buildings with realistic wind loads

“…(The time history of the pressure at the same single point is shown in inset (A).) Because of these large spatial gradients, it is well known that averaging over larger areas yields significantly smaller aerodynamic force coefficients than those at a single point (e.g., Surry et al, 2007). This is illustrated in inset (A) of Fig.…”

“…The primary innovations for the 3LP project were to (i) substantially increase the frequency response of the pressure-controlling valve, (ii) allow for leakage through the component or cladding, and (iii) reduce the footprint of the unit size so that many could be mounted in close proximity. The latter point was important so that spatial variations of pressure could be captured by mounting many PLAs and air-boxes adjacent to each other, over the building or component surface(s), similar in concept to the multiple magnetic actuators developed at Mississippi State University by Sinno and colleagues (Surry et al, 2007). However, since the 3LP approach is based on applying pressures, the development of a flexible air-box system that attaches to the building surface was also required.…”

“…The test protocol used is similar to that used by Farquhar et al (2005) and Surry et al (2007). A representative portion of time series of the wind tunnel measured pressure coefficients (Cp) was selected and scaled to full-scale pressures using a mean roof height, mean wind speed of 20 m/s.…”