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September 10, 2025

Response Spectrum Analysis of A G+3 Building With Wind Loads

JHJanggouthang HaokipNational Institute of Technology Delhi SRSaba RahmanNational Institute of Technology Delhi RMRahul Kumar MeenaNational Institute of Technology Delhi

Key Points

The majority natural frequencies were measured at 2.933 Hz, 5.056 Hz, and 9.372 Hz, indicating essential insights into dynamic behavior.
Total base shear recorded was 243.86 kN, reflecting the building's response to imposed wind loads during analysis.
Maximum roof displacement was determined to be 4.050 mm, revealing information about how the structure will perform under dynamic conditions.
The analysis was performed using STAAD Pro, ensuring compliance with IS 1893:2016 for seismic considerations.

Abstract

This article conducts a Response Spectrum Analysis (RSA) of a G+3 reinforced concrete framed structure utilizing STAAD Pro. The natural frequencies for the initial three vibration modes, total base shear, inter-story drift ratios, and roof-level displacement are extracted and analyzed. The RSA is performed in accordance with IS 1893:2016 (Part 1) for Seismic Zone V, utilizing medium soil, an importance factor of 1.0, a response reduction factor of 5.0, 5% damping, and CQC combination methodology. The findings indicate that the initial three natural frequencies are 2.933 Hz, 5.056 Hz, and 9.372 Hz, the cumulative base shear is 243.86 kN, and the maximum roof displacement is 4.050 mm. These values offer insight into the building's dynamic performance.

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