Updated Design Wind Map for Brazil and Impacts on the Reliability of Built Structures

A climatology-based wind speed map for NBR 6123

“…[1], Figure 1], like the strong gradients (concentration of isopleths) over the cities of Brasília and Campinas. The large size of the climatology-based wind regions in Figure 11 is also evidence against some localized details of more recent maps, like the strong gradients over the west of Santa Catarina in [7], [8], and over other seemingly arbitrary small regions in [8]. Some regions, like the south of Brazil, can experience intense winds of synoptic-scale as well as from TS events…”

“…More recent studies like Almeida [5], Beck and Correa [6], Vallis [7] and Pires et al [8] employed the Gumbel distribution to adjust annual maximum velocities. Mixed wind series were considered in [5], [6] and [7]; classified and mixed wind series were considered in [7], [32].…”

“…[ 5] - [ 7] , conventional mathematical regression was used to draw the V 0 isopleths map. Pires et al [8] used Kriging, which is a powerful regression and interpolation tool, but which puts too much weight on the measured wind speed data.…”

“…Recent research on the topic includes Almeida [5], Beck and Correa [6] and Vallis [7], who proposed maps based on mathematical regression. More recently, Kriging regression/interpolation was also proposed [8]. Vallis [7] also presented a V 0 map for Brazil in zone format.…”