Bilateral Interference of Wind Loads Induced on Duplicate Building Models of Various Shapes

Supriya Pal,S Anbukumar,Ritu Raj

doi:10.1590/1679-78256595

Supriya Pal, S Anbukumar + Show 1 more

Open Access

https://doi.org/10.1590/1679-78256595

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Abstract

The current investigation focuses on the results of an experimental investigation of Square-plan-shape and Remodel-triangle-shape building model’s varied interference conditions between duplicate building models of 1:300 scale (at 100% blockage) on wind-induced pressure and base moments at fixed 10% of the height of the instrumented model. Under current working conditions, the study concludes that -1 > Interference Factor > 1 as experienced by the Remodel-triangle-shape model results in reduced performance of the instrumented model as opposed to the Square-plan-shape model. Front-to-Front interference condition of Remodel-triangle-shape model has the best overall performance in along-wind and crosswind directions, whereas Front-to-Back interference condition of Remodel-triangle-shape model has the best torsional performance. Back-to-Back interference of a Remodel-triangle-shape model should be avoided because the orientation of duplicate models attracts the most overturning moments in both the along-wind and crosswind directions of all interference conditions investigated in this study.

Highlights

Tall buildings, as per Xu et al (2014) are more prone to wind vibrations and receptive to dynamic loads
Due to the unconventional cross-section plan shape of the model with gradual increase and decrease of crosssection plan magnitude, which is unlike the Square-plan-shape model (SPS) building model and unlike any other interference studies, very high turbulence is seen at some faces of all interference conditions at the Remodel-triangle-shape model (RTS) instrumented building in Figure 13(a) to (d)
The purpose of this paper is to investigate the effects of interference of duplicate SPS and RTS building models at various 100% blockage conditions

Summary

Introduction

As per Xu et al (2014) are more prone to wind vibrations and receptive to dynamic loads. Wind-induced accelerations, as mentioned by Farouk (2016) might cause discomfort to the occupants and so are taken into account as one of the most utility criteria whereas designing tall buildings. This variation of the wind-induced load is because of the event of high turbulence of wind at the instrumented building model. Ample quantity data is accessible in numerous international standards (AS/ NZS: 1170.2:2011, ASCE: 7-02 (2002), BS 6399-2:1997, EN 1991-1-4:2005/AC: 2010(E), and IS: 875 (Part 3): 2015) under isolated wind incidence conditions for square, rectangular, cylindrical, and so forth plan shape buildings. The findings of this study can guide structural designers in deciding from a variety of inventive solutions to meet a structure's collapse and serviceability requirements in extreme wind conditions

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