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International Journal for Research Trends and Innovation
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ISSN Approved Journal No: 2456-3315 | Impact factor: 8.14 | ESTD Year: 2016
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Volume 11 | Issue 6
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| Paper Title: | Seismic Vulnerability and Torsional Amplification in G+16 T-Shaped RC Structures |
| Authors Name: | Pratik Sahebrao Ghorpade , Prof. Dr. Gunaware P.D. , Prpf.Khamkar R.S. |
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IJRTI_212650
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| Published Paper Id: | IJRTI2605091 |
| Published In: | Volume 11 Issue 5, May-2026 |
| DOI: | |
| Abstract: | The increasing architectural demand for functionally diverse configurations has led to the widespread adoption of asymmetric structures, such as T-shaped buildings, which inherently possess plan irregularities. In these structures, the center of mass (CM) and the center of rigidity (CR) do not naturally coincide, leading to significant eccentricity and severe lateral-torsional coupling during seismic events. This study investigates the torsional behaviour and dynamic response of a G+16 multi-story, T-shaped reinforced concrete (RC) building. The structural framework was modelled and analyzed using ETABS software, employing Response Spectrum Analysis (RSA) in compliance with IS 1893:2016 guidelines for Seismic Zone 3. Critical response parameters, including maximum story displacement, base shear, story drift, and modal time periods, were evaluated to quantify torsional irregularities. The analytical results demonstrated a substantial shift of the CR towards the stiffer flange portion of the building, causing extreme torsional stress and dangerous stress concentrations specifically at the re-entrant corners. Under lateral seismic loading, the drift ratio (D_{max}/D_{avg}) indicated the presence of extreme torsional irregularities along the Y-direction. To mitigate these vulnerabilities, targeted structural interventions were evaluated; the findings confirm that the strategic placement of shear walls at re-entrant corners or the implementation of seismic joints effectively shifts the CR closer to the CM, thereby optimizing lateral stability and minimizing overall torsional rotation. |
| Keywords: | Lateral-Torsional Coupling Vulnerability, CM-CR Eccentricity Analysis, Torsional Irregularity Ratio Evaluation, Response Spectrum Analysis( (RSA),G+16 RC Frame Torsional Behaviour |
| Cite Article: | "Seismic Vulnerability and Torsional Amplification in G+16 T-Shaped RC Structures", International Journal for Research Trends and Innovation (www.ijrti.org), ISSN:2456-3315, Vol.11, Issue 5, page no.a731-a739, May-2026, Available :http://www.ijrti.org/papers/IJRTI2605091.pdf |
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2456-3315 | IMPACT FACTOR: 8.14 Calculated By Google Scholar| ESTD YEAR: 2016 An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 8.14 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator |
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Published Paper ID: IJRTI2605091
Registration ID:212650
Published In: Volume 11 Issue 5, May-2026
DOI (Digital Object Identifier):
Page No: a731-a739 Country: Ahmednagar, Maharashtra, India Research Area: Civil Engineering Publisher : IJ Publication Published Paper URL : https://www.ijrti.org/viewpaperforall?paper=IJRTI2605091 Published Paper PDF: https://www.ijrti.org/papers/IJRTI2605091 |
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ISSN: 2456-3315
Impact Factor: 8.14 and ISSN APPROVED,
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