Abstract
The geometric shape of buildings in wind field is an important influencing factor of wind pressure distribution on the buildings. Along with the change of roof shape, wind pressure distributions vary obviously. In this paper, the numerical simulation of the wind pressure for four types of large-span roofs is carried out, using CFX12.0 as computing platform. The characteristics of wind pressure distribution are studied by considering some parameters, such as wind direction, rise-span ratio, and terrain roughness. Wind pressure distribution is greatly affected by wind direction, and the wind pressure on large-span roofs is dominated by suction; the vortex shedding produced by airflow separation is the main factor affecting the characteristics of wind load.
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