A Simplified Parametric Study on Occupant Comfort Conditions in Base Isolated Buildings under Wind Loading
Table 1
Terrain categories as defined by Eurocode 1 [16] and corresponding roughness length , terrain factor , and parameter according to the Italian technical standard [17].
Terrain category
Description
(m)
(m)
I
Sea or coastal area exposed to the open sea
0.01
2
0.17
II
Lakes or flat and horizontal area with negligible vegetation and without obstacles
0.05
4
0.19
III
Area with low vegetation such as grass and isolated obstacles (trees, buildings) with separations of at least 20 obstacle heights
0.10
5
0.20
IV
Area with regular cover of vegetation or buildings or with isolated obstacles with separations of maximum 20 obstacle heights (such as villages, suburban terrain, permanent forest)
0.30
8
0.22
V
Area in which at least 15% of the surface is covered with buildings and their average height exceeds 15 m
