COMPARATIVE ANALYSIS OF WIND PRESSURE OF UNTAR MAIN BUILDING
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Abstract
Wind flows from high to low pressure due to presence of solar heat. The movement of wind in air is freely
exposed to obstacles such as buildings, especially in large cities. Buildings that are exposed to wind create
pressure for building which can be compressive or suction. In this study, wind pressure analysis was used in
three ways, that is with MIDAS GEN software, Autodesk CFD, and with manual calculation analysis
referring to Indonesia National Standard (SNI) 1727:2020. The building modeling used as test is main
building of UNTAR campus 1 with total height 89 m. The tested wind direction moved from south to north
and from west to east at a wind speed 32 m/s. The results of analysis showed that percentage of wind
pressure results between MIDAS GEN with manuals was at least 5.66% for both wind directions and
between CFD and manuals at least 0.7% for wind directions from south to north. The results from CFD also
show that result the main building surface wind pressure for wind flows moving from south to north results in
wind load in the edge area building smaller than in the central area building. The amount of wind pressure in
center of surface can be 4 to 5 times greater than wind pressure at the edge of surface.
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