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Steel Moment Resisting Frames (SMRFs) are widely used in seismic prone regions due to their excellent ductility and energy dissipation capacity. This study investigates the seismic behaviour of SMRFs with torsional irregularity using non- linear dynamic and static analysis methods. The research based on finite element modelling and follows design guidelines specified in seismic codes such as IS1893-2016. Key performance indicators, including inter-story drift, base shear, and torsional amplification, are analysed to understand the vulnerability of these structures. The study also explores potential mitigation strategies, such as strengthening techniques and optimized structural configurations, to enhance seismic resilience. The main objective of the present work is to study effect of torsional irregularity on performance of RCC structure by using literature available to design 9 storey SMRF for various degrees of torsional irregularity in plan accordingly to IS800, IS 875 Part III, IS1893 by using linear response spectrum analysis and to perform non-linear analysis carried out of 9 Storey SMRF by using relevant software for various degrees of torsional irregularity by using nonlinear time history analysis for selected ground motion. To analyse the steel SMRF with torsional irregularity for seismic & wind Forces & to compare the seismic & Wind Forces Results.

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Seismic and Wind Performance of Steel Special Moment Resisting Frame (SMRF) with Torsional Irregularity

  • 会议论文

  • 发表日期：

    2026年

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  • Bharati Sawant,
  • Shriganesh Kadam,
  • Ajit Karande

摘要

Steel Moment Resisting Frames (SMRFs) are widely used in seismic prone regions due to their excellent ductility and energy dissipation capacity. This study investigates the seismic behaviour of SMRFs with torsional irregularity using non- linear dynamic and static analysis methods. The research based on finite element modelling and follows design guidelines specified in seismic codes such as IS1893-2016. Key performance indicators, including inter-story drift, base shear, and torsional amplification, are analysed to understand the vulnerability of these structures. The study also explores potential mitigation strategies, such as strengthening techniques and optimized structural configurations, to enhance seismic resilience. The main objective of the present work is to study effect of torsional irregularity on performance of RCC structure by using literature available to design 9 storey SMRF for various degrees of torsional irregularity in plan accordingly to IS800, IS 875 Part III, IS1893 by using linear response spectrum analysis and to perform non-linear analysis carried out of 9 Storey SMRF by using relevant software for various degrees of torsional irregularity by using nonlinear time history analysis for selected ground motion. To analyse the steel SMRF with torsional irregularity for seismic & wind Forces & to compare the seismic & Wind Forces Results.