Wind-tunnel study of cross vault structures.

Show simple item record Bradley, Ryan Anthony. 2011-10-11T11:44:37Z 2011-10-11T11:44:37Z 2011-10-11
dc.description.abstract The present study examines the effects of surface roughness, flow characteristics, wind orientation and small geometrical changes of the roof apex (rise) on pressures measured at centrally located areas of the cross vault structure. The parameters noted above are assessed to shed light on their influence on pressure distributions and, ultimately, the loading on these structures. . Three cross vault models with flat, convex and concave roof apex geometries have been tested in two generic boundary-layer profiles within the BLWT at the CSIR, Pretoria, South Africa. The study revealed that relatively small changes in roof geometry can noticeably influence the distribution of surface pressures, at certain azimuths and areas of the roof. Generally, mean and negative peak pressures over the cross vaults increased with the addition of surface roughness. Furthermore, mean pressures showed marginal sensitivity to the change of boundary-layer conditions, whereas noticeable differences were evident for the fluctuating pressures. en_US
dc.language.iso en en_US
dc.title Wind-tunnel study of cross vault structures. en_US
dc.type Thesis en_US

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