Large-scale testing on wind uplift of roof pavers

This paper presents a large-scale experimental study to investigate the wind loading on concrete roof pavers on the flat roof of a low rise building. The experiments were performed in Wall of Wind, a large-scale hurricane testing facility at Florida International University. Experiments included both wind blowoff tests and pressure measurements on the top and bottom surfaces of the pavers. The effects of the pavers' edge-gap to spacer height ratio and the relative parapet height on the wind performance of roof pavers were also investigated. The results showed that increasing the edge-gap to spacer height ratio parameter decreases the net pressures by enhancing pressure equalization between top and bottom surfaces. Also, increasing the relative parapet height reduces the worst suctions for the parapet heights considered in this study. The resolution of the pressure taps was found to have significant influence on the test results. Too few taps can result in underestimation of the net uplift and overturning moments that can cause failure under strong winds. Guidelines on the resolution and location of pressure taps were provided for better capturing the effects of conical vortices on wind loads on pavers. Results of the wind blow-off tests are compared with those obtained from pressure measurements and a typical practice based on ASCE 7-10 exterior pressures. (C) 2014 Elsevier Ltd. All rights reserved.