Critical Comparative Study of Dynamic Wind Response of Tall Buildings Using Gust Effectiveness Factor Method
Author(s):
Vedika Manohar Bhat , Chetan S. Patil
Keywords:
ETABS, IS 875 (Part 3) 2015, dynamic wind load, terrain category, story drift, story displacements.
Abstract
The advent of low-density high strength construction materials, along with advancements in computer and analysis techniques, has led to the emergence of tall and flexible structures that are vulnerable to the influences of dynamic wind loading. The second edition of the Indian wind loading codal regulations, namely IS 875 (Part 3) 2015, incorporates the gust factor approach to effectively consider the dynamic characteristics of wind in relation to flexible structures. An endeavour is undertaken to evaluate and contrast the reactions of different stresses exerted on high-rise structures. The gust factor approach, as specified by IS 875-2015, is employed for the determination of dynamic wind load. The methodology employed in this study was the determination of the static wind load, dynamic wind load, and static equivalent earthquake load in order to ascertain the magnitude of force exerted on each individual story. This comparative study utilizes four models with varying aspect ratios derived from the G+20 and G+40 narratives. The outcomes are shown in relation to tale drift, story force, and story displacements. Furthermore, the analysis is conducted on structures situated on inclined terrain, featuring square and rectangular floor plans. This comparative study demonstrates that the dynamic wind load response of a building exhibits a non-linear parabolic relationship with an increase in the number of stories. In contrast, the response of the static wind load is linear in nature. The ETABS program is utilized. The investigation has revealed that the categorization of terrain has a significant influence in determining the suitability between the two methodologies. The work has indicated that in terrain category 4, the static technique is deemed more crucial when compared to the dynamic approach. Conversely, in terrain category 2, the dynamic approach is considered more vital than the static approach.
Article Details
Unique Paper ID: 161681

Publication Volume & Issue: Volume 10, Issue 5

Page(s): 340 - 347
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