Scholarlink

<p>Past destructive earthquakes have highlighted the vulnerability of substandard reinforced concrete (RC) buildings that do not comply with seismic design codes. To ensure safety of the occupants and mitigate the losses, these buildings should be urgently retrofitted or rebuilt. This study evaluates conventional retrofitting techniques (integration of new shear walls, and RC jacketing of existing columns), and innovative techniques (fiber-reinforced polymer confinement, and RC thin jacketing with FRP confinement of existing RC columns) in enhancing seismic performance and reducing potential losses. For this purpose, an existing RC moment frame building representing the common characteristics of substandard RC frame buildings in Türkiye was considered. After performing seismic assessment of the building and demonstrating its unsatisfactory performance, retrofit designs were made to satisfy the target seismic performance limit (life safety). A series of nonlinear structural analyses were performed in accordance with the incremental dynamic analysis technique for both the as-built and the retrofitted states. The typical characteristics of substandard buildings (i.e., low strength concrete, lack of confinement, tendency of longitudinal bars to buckle, etc.) were considered during the numerical modelling. Fragilities were generated for <i>immediate occupancy</i>, <i>life safety</i>, and <i>collapse prevention</i> limit states. As the ground motion intensity measure, the Peak Ground Acceleration (PGA) and Peak Ground Velocity (PGV) were utilized. Furthermore, cost-benefit analyses were conducted to assess the relative effectiveness of alternative retrofitting techniques in terms of mitigating potential losses. All retrofitting strategies were found to become economically beneficial within a short time horizon, ranging between 3 and 7 years.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Comparison of alternative seismic retrofitting strategies for a substandard reinforced concrete building: a cost-benefit analysis

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月13日

查看全文
  • Goktug Unal,
  • Mehmet Akif Altinok,
  • Cem Demir,
  • Ufuk Yazgan,
  • Alper Ilki

摘要

Past destructive earthquakes have highlighted the vulnerability of substandard reinforced concrete (RC) buildings that do not comply with seismic design codes. To ensure safety of the occupants and mitigate the losses, these buildings should be urgently retrofitted or rebuilt. This study evaluates conventional retrofitting techniques (integration of new shear walls, and RC jacketing of existing columns), and innovative techniques (fiber-reinforced polymer confinement, and RC thin jacketing with FRP confinement of existing RC columns) in enhancing seismic performance and reducing potential losses. For this purpose, an existing RC moment frame building representing the common characteristics of substandard RC frame buildings in Türkiye was considered. After performing seismic assessment of the building and demonstrating its unsatisfactory performance, retrofit designs were made to satisfy the target seismic performance limit (life safety). A series of nonlinear structural analyses were performed in accordance with the incremental dynamic analysis technique for both the as-built and the retrofitted states. The typical characteristics of substandard buildings (i.e., low strength concrete, lack of confinement, tendency of longitudinal bars to buckle, etc.) were considered during the numerical modelling. Fragilities were generated for immediate occupancy, life safety, and collapse prevention limit states. As the ground motion intensity measure, the Peak Ground Acceleration (PGA) and Peak Ground Velocity (PGV) were utilized. Furthermore, cost-benefit analyses were conducted to assess the relative effectiveness of alternative retrofitting techniques in terms of mitigating potential losses. All retrofitting strategies were found to become economically beneficial within a short time horizon, ranging between 3 and 7 years.