Effect of Terrain Category, Aspect Ratio and Number of Storeys on the Shear Lag Phenomenon in RCC Framed Tube Structures

Abstract

Nowadays many tall structures and high rise buildings are being built all around the world. Wind load is found to be dominant load in analysis of tall structures. The IS 875 (Part-3): 2015 deals with wind loads on different types of structures. Effect of wind is predominant on tall structures depending on location of the structure and height of the structure. Tubular structures, when subjected to lateral load such as wind load, the corner columns experience much higher axial load due to the shear lag phenomenon. Several studies investigated tall tubular structures for its shear lag responses. In this study, both tubular and realistic framed buildings have been studied for the understanding of relative shear lag effect subjected to wind loading. This study presents the shear lag effects on buildings with different terrain categories as per IS 875 (Part3), with varying plan aspect ratio using STAAD.Pro. Both tubular and framed models are analyzed with aspect ratio 0.5, 0.75, 1 and 1.167. Also the effect of height variation on amplified axial forces is studied by varying height from 16 to 40 storeys. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.