• Manoj Pillai
• Roshni John

There has been a considerable rise in the development of high rise buildings in our country mostly in the metropolitan cities such as Delhi and Mumbai. Usable land restriction for construction and rise in population in the cities are the main problems. It is very challenging for structural engineers in designing the tall structure. Tall structures are very critical to the lateral dynamic loads such as wind and earthquake load. To resist such lateral loads many lateral resisting systems are developed. One such interior lateral load resisting system is an outrigger system. But usage of conventional outrigger system involves trusses in the mechanical floors and thus reducing the usable rentable space. Hence a new alternative, flag walls (RC walls not reaching foundation) can be used as they save the space used by outrigger trusses. The main objective of this paper is to study the behavior of flag wall systems and conventional system of a 65-storey three dimensional model subjected to wind load. The analysis is done by using ETABS (Version.2016) software with Indian standards codal provisions for all the models. The results show that, flag system has a significant effect in reduction of lateral displacement and storey drift of tall buildings.

Outriggers, Flag wall, lateral load resisting system

"Performance Evaluation of High-Rise Building with Reinforced Concrete Flag Walls under Wind Load ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.36-41, March-2019, Available :http://www.jetir.org/papers/JETIRAV06008.pdf

"Performance Evaluation of High-Rise Building with Reinforced Concrete Flag Walls under Wind Load ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp36-41, March-2019, Available at : http://www.jetir.org/papers/JETIRAV06008.pdf