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Sustainable Seismic Performance Assessment of Asymmetrical High-Rise RC Buildings Using NonLinear Dynamic Analysis

  • Unique Paper ID: 181693
  • Volume: 12
  • Issue: 1
  • PageNo: 5229-5239
  • Abstract:
  • Earthquakes pose a continuous threat to life and infrastructure, especially in regions of high seismicity, making accurate assessment of structural response critical for the safety and resilience of modern buildings. This study explores the seismic performance of asymmetrical high-rise reinforced concrete (RC) buildings—specifically L-, T-, U-, and E-shaped configurations—which inherently introduce plan irregularities due to uneven mass and stiffness distribution. These irregularities lead to complex dynamic behaviors such as torsional effects and stress concentrations that can significantly influence seismic response. Using ETABS 2021, 30-storey Special Moment Resisting Frame (SMRF) models were developed and analyzed with two advanced dynamic methods: Nonlinear Time History Analysis (NLTHA) and Response Spectrum Analysis (RSA), following the provisions of IS 1893:2016. The models incorporated geometric and material nonlinearity, P-delta effects, and Rayleigh damping, with seismic input based on the 2001 Bhuj earthquake (Zone V) to simulate realistic ground motion. Key parameters such as storey displacement, inter-storey drift, base shear, stiffness, and joint acceleration were evaluated across all configurations. The results demonstrated that the shape and plan irregularity of a building critically affect its seismic performance. The L-type configuration showed superior performance in controlling displacement and maintaining stiffness, while T- and E-types exhibited higher vulnerability to lateral forces. Moreover, NLTHA consistently predicted more realistic and severe responses compared to RSA, underscoring the necessity of nonlinear analysis for irregular structures. Supporting UN Sustainable Development Goal 11 (Sustainable Cities and Communities), this research advances the understanding of seismic design for irregular high-rise buildings, contributing to the development of disaster-resilient infrastructure.
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Cite This Article

  • ISSN: 2349-6002
  • Volume: 12
  • Issue: 1
  • PageNo: 5229-5239

Sustainable Seismic Performance Assessment of Asymmetrical High-Rise RC Buildings Using NonLinear Dynamic Analysis

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8.01 (Year 2024)
UGC Approved
Journal no 47859

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