The distribution of pressure near roof corners of flat roof low buildings

Wind tunnel study on the influence of different parapets on the roof pressure distribution of low-rise buildings

“…The highest suction forces appear close to the eaves and the roof edges, and are obtained for oblique wind directions. These severe mean suction peaks, which can produce cladding failures, usually only affect a small roof area near the windward corner, the reason being that the absolute value of the pressure coefficient seems to decrease as the inverse of the root of the distance to the roof corner [3,4].…”

Influence of an upstream building on the wind-induced mean suction on the flat roof of a low-rise building

“…As it is well known and documented, the largest wind loads produced on the roofs of buildings are caused by the vortex flow pattern generated on the surface of the roof (Banks et al, 2000;Meroney, 2001a, 2001b;Franchini et al, 2005;Hoxey et al, 1998;Kawai, 1997Kawai, , 2002Lin et al, 1995;Marwood and Wood, 1997;Wu et al, 2001aWu et al, , 2001b. This vortex flow pattern is generated close to the roofs' corners for oblique wind directions and it normally consists of two conical vortices, each associated to one of the two edges that form the roof corner (Fig.…”

“…However, it must be pointed out that depending on the size of the building and the shape of the roof (canopy, gable, etc.) the wind direction, which produces the largest suction load can be quite different from jS=45° (Franchini et al, 2005;Hoxey et al, 1998;Lin et al, 1995;Wu et al, 2001a).…”

Evaluation of Wind-Induced Internal Pressure In Low-Rise Buildings: A Multi Scale Experimental and Numerical Approach

“…The severity of vortex-induced uplift observed on roofs is well documented by the following researchers (Stathopoulos 1987;Kramer and Gerhardt 1989;Saathoff and Melboume 1989;Stathopoulos et al 1990;Cochran and Cermark 1992;Gerhardt and Kramer 1992;Mehta and Levitan 1992;Cochran et al 1993;Tieleman et al 1994;Lin et al 1995;Kawai and Nishimura 1996;Lin and Surry 1998;Banks and Meroney 2001;Robertson et al 2007). Once the roof corner is ripped off, the damage usually cascades to other areas and cause subsequent damage due to water intrusion, change in internal aerodynamics, etc.…”