Experimental Study on the Effects of Aspect Ratio on the Wind Pressure Coefficient of Piloti Buildings

Jangyoul You,Changhee Lee

doi:10.3390/su13095206

Abstract

Owing to strong winds during the typhoon season, damage to pilotis in the form of dropout of the exterior materials occurs frequently. Pilotis placed at the end exhibit a large peak wind pressure coefficient of the ceiling. In this study, the experimental wind direction angle of wind pressure tests was conducted in seven directions, with wind test angles varying from 0° to 90° at intervals of 15°, centered on the piloti position, which was accomplished using the wind tunnel experimental system. Regardless of the height of the building, the maximum peak wind pressure coefficient was observed at the center of the piloti, whereas the minimum peak wind pressure coefficient was noted at the corners, which corresponds with the wind direction inside the piloti. The distribution of the peak wind pressure coefficient was similar for both suburban and urban environments. However, in urban areas, the maximum peak wind pressure coefficient was approximately 1.4–1.7 times greater than that in suburban areas. The maximum peak wind pressure coefficient of the piloti ceiling was observed at the inside corner, whereas the minimum peak wind pressure coefficient was noted at the outer edge of the ceiling. As the height of the building increased, the maximum peak wind pressure coefficient decreased. Suburban and urban areas exhibited similar peak wind pressure distributions; however, the maximum peak wind pressure coefficient in urban areas was approximately 1.2–1.5 times larger than that in suburban areas.

Highlights

Many studies have focused on the aerodynamic optimization of buildings
The minimum peak wind pressure coefficients ranged from −2.2 to −0.5 for the suburban areas and from −2.3 to −0.4 for the urban areas
Distribution of pilotis peak wind pressure coefficients the ceilingwind and walls of end- and corner-type was analyzed pressure coefficient was observed at the ceiling and the left wall, and the absolute value of coefficientstoalong theheight

Summary

Introduction

Many studies have focused on the aerodynamic optimization of buildings. In a study on the design of affordable housing models for high-rise buildings, Baghaei [1]focused on the use of environmental factors in humid subtropical climates and examined the aerodynamic behavior of wind in an urban environment to optimize the shapes of 40 types of prototype buildings. Many studies have focused on the aerodynamic optimization of buildings. In a study on the design of affordable housing models for high-rise buildings, Baghaei [1]. Focused on the use of environmental factors in humid subtropical climates and examined the aerodynamic behavior of wind in an urban environment to optimize the shapes of 40 types of prototype buildings. The results were used to develop a suitable model for residential high-rise buildings in temperate and humid climates; these results suggest an appropriate approach for the aerodynamic design of high-rise forms and offer appropriate aerodynamic corrections to reduce the wake of vortex areas around highrise buildings. Davenport [2] used aerodynamic model tests to investigate the effects of building forms. The potential effects of aerodynamic calibration have been analyzed in terms of economics (cost and available space) [11]

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