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<p>This study aims to assess the seismic vulnerability of multi-storeyed residential reinforced concrete buildings with Open Ground Storey (OGS) in a testbed located in the northeast region of India. OGS buildings refer to the typology where infill panels are present in all storeys except the ground storey. The ground storeys of the residential apartment buildings are kept open to facilitate vehicle parking. A thorough investigation of the available literature highlights the critical seismic history of northeast India. Extensive research has contributed to the development of the seismic characteristics of this region. However, a significant gap is observed in the assessment of the seismic vulnerability of the building structures of the region due to insufficient documentation of detailed engineering aspects of buildings and limited available resources. Further, considerable variations in the construction practices, quality of construction and differences in detailed building classification across regions can pose a major challenge in the direct implementation of the pre-defined vulnerability models. The current research focused on the development of the vulnerability models of OGS buildings, a widely popular typology, but significantly vulnerable to seismic risks. Detailed classification of the OGS building typology and subsequent vulnerability evaluation revealed the significance of the numerous structural parameters that demand inclusion apart from building height in a vulnerability-based building classification system. The mean fractional deviation and proposed correction factors in reference to HAZUS 2022 proved to be highly effective for validation of the current vulnerability assessment outcomes and rating of the classification parameters. The study conducts a performance grading assessment to correlate the damage probabilities of OGS buildings with the corresponding fully infilled models. Based on the comprehensive assessment, a map showing the probable damage states of the participatory OGS buildings is developed to offer an expanded perspective on the location’s seismic risk to a design-level earthquake intensity. The current study can serve as a benchmark for the identification of vulnerable OGS buildings and enhance seismic risk mitigation strategies through prioritized retrofitting interventions.</p>

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Seismic vulnerability assessment of RC buildings with open ground storey in Northeast India

  • 期刊论文

  • 发表日期：

    2025年11月14日

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  • Karabi Bharadwaj,
  • Jayanta Pathak,
  • Debaraj Bailung Sonowal

摘要

This study aims to assess the seismic vulnerability of multi-storeyed residential reinforced concrete buildings with Open Ground Storey (OGS) in a testbed located in the northeast region of India. OGS buildings refer to the typology where infill panels are present in all storeys except the ground storey. The ground storeys of the residential apartment buildings are kept open to facilitate vehicle parking. A thorough investigation of the available literature highlights the critical seismic history of northeast India. Extensive research has contributed to the development of the seismic characteristics of this region. However, a significant gap is observed in the assessment of the seismic vulnerability of the building structures of the region due to insufficient documentation of detailed engineering aspects of buildings and limited available resources. Further, considerable variations in the construction practices, quality of construction and differences in detailed building classification across regions can pose a major challenge in the direct implementation of the pre-defined vulnerability models. The current research focused on the development of the vulnerability models of OGS buildings, a widely popular typology, but significantly vulnerable to seismic risks. Detailed classification of the OGS building typology and subsequent vulnerability evaluation revealed the significance of the numerous structural parameters that demand inclusion apart from building height in a vulnerability-based building classification system. The mean fractional deviation and proposed correction factors in reference to HAZUS 2022 proved to be highly effective for validation of the current vulnerability assessment outcomes and rating of the classification parameters. The study conducts a performance grading assessment to correlate the damage probabilities of OGS buildings with the corresponding fully infilled models. Based on the comprehensive assessment, a map showing the probable damage states of the participatory OGS buildings is developed to offer an expanded perspective on the location’s seismic risk to a design-level earthquake intensity. The current study can serve as a benchmark for the identification of vulnerable OGS buildings and enhance seismic risk mitigation strategies through prioritized retrofitting interventions.