NUMERICAL STUDY OF WIND FLOW BEHAVIOUR AROUND HIGH-RISE BUILDINGS USING COMPUTATIONAL FLUID DYNAMICS (CFD)

• Main Author: Yudhistira Prakosa, Arga
• Format: Theses
• Language: Indonesia
• Subjects: Teknik sipil
• Online Access: https://digilib.itb.ac.id/gdl/view/61626
• Institution: Institut Teknologi Bandung

The development of civil construction technology in Indonesia continues to grow along with the increase of high-rise building construction in downtown area. The emergence of high-rise buildings causes a change of wind flow characteristics that generate several phenomena in which could influence the surrounding buildings directly. One of the observable phenomena is the wind velocity amplification that caused by the narrowing of the wind flow section (venturi effect). Small buildings (such as pedestrian bridge, low-rise buildings, billboard, etc) that located in the building passage, are the example of various buildings that were influenced directly by the venturi effect, considering lateral wind load analysis method using the applicable codes (SNI, ASCE, Eurocede) are using wind velocity to calculate the lateral wind load applied in structures. This study aims to investigate the effects of wind velocity amplification towards lateral wind loads applied to a structure located in passages between 4 symmetrical buildings using computational fluid dynamics (RANS and LES) which is verified in several location using experimental results. The results shows that the correlation between wind velocity amplification and lateral wind load amplification can be simply correlated by wind load amplification equals to the square of wind velocity amplification. In addition, wind amplification in between building passages can reach 16,5% with lateral wind load amplification reaching 36%.