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@article{207533,
        author = {Swapnil Dhakol and Sangketa Sangma},
        title = {EFFECTS OF STORY DRIFT AND BUILDING DEFLECTION DUE TO WIND AND EARTHQUAKE FORCES IN THE PRESENCE OF MULTIPLE LEVEL OUTRIGGERS},
        journal = {International Journal of Innovative Research in Technology},
        year = {2026},
        volume = {13},
        number = {3},
        pages = {1506-1510},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=207533},
        abstract = {The increasing height of reinforced concrete (RC) buildings makes them more vulnerable to earthquake and wind-induced lateral forces. Outrigger systems are widely used to enhance the lateral stiffness and stability of tall buildings by connecting the central core to the perimeter columns. This study evaluates the seismic performance of a 257.6 m high RC residential building with three outrigger configurations: bottom-level, bottom and mid-level, and bottom–mid–top outriggers.
The building was modelled in ETABS and analysed using the Equivalent Static Method and Response Spectrum Method in accordance with IS 456:2000, IS 1893 (Part 1):2016, IS 875 (Part 3):2015, and IS 800:2007. The performance of each configuration was assessed based on modal characteristics, modal participating mass ratio, base reactions, storey displacement, and inter-storey drift.
The results show that the addition of outriggers significantly improves the lateral stiffness and seismic performance of the building. Among the three configurations, the bottom–mid–top outrigger system provides the best overall performance, reducing the maximum top-storey displacement by approximately 32% compared with the single-outrigger configuration while maintaining storey drift within the permissible limits of IS 1893 (Part 1):2016. The study concludes that strategically placing multiple outriggers enhances the safety, stability, and serviceability of high-rise RC buildings under combined seismic and wind loading.},
        keywords = {Outrigger system, Response spectrum analysis, Seismic performance, Storey displacement, Storey drift, Lateral stiffness.},
        month = {August},
        }