Scholarlink

<p>Many existing mid-rise reinforced concrete (RC) buildings in high seismic hazard regions require retrofitting to improve seismic performance under current criteria. Passive energy dissipation systems are a practical option to enhance response, but their design often relies on computationally demanding nonlinear analyses. This study examines a displacement-based design (DBD) procedure for retrofitting RC buildings in Mendoza, Argentina, using hysteretic steel dampers. The method idealizes the retrofitted structure (existing frame and dampers acting in parallel) as an equivalent single-degree-of-freedom system. Equivalent damping is estimated through a closed-form formulation intended to capture the interaction between the original frame and the added devices. Three mid-rise regular RC buildings representative of the Cuyo region are considered. Retrofit solutions are assessed through nonlinear time-history analyses using far-field and near-field ground motions scaled by spectral matching. The results indicate that the procedure can achieve substantial reductions in global displacement demand and interstory drifts for the studied cases, and it tends to produce a more uniform drift distribution along the height at the design level. As expected, the retrofit increases base shear demand relative to the original structures. For the analyzed buildings and record set, peak drift estimates from the proposed procedure show close agreement with nonlinear dynamic results. The findings suggest that the approach may provide an efficient preliminary design tool for regular mid-rise RC frames with hysteretic dampers; however, its applicability should be verified for other structural configurations, irregularities, and broader ground-motion characteristics.</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

Impact of a displacement-based design procedure in the hysteretic steel dampers-based seismic retrofitting of mid-rise regular reinforced concrete framed buildings

  • 期刊论文

  • 发表日期：

    2026年4月17日

查看全文
  • Cristian O. Bay,
  • Gustavo L. Palazzo,
  • José Luis Almazán,
  • Jesús D. Villalba-Morales

摘要

Many existing mid-rise reinforced concrete (RC) buildings in high seismic hazard regions require retrofitting to improve seismic performance under current criteria. Passive energy dissipation systems are a practical option to enhance response, but their design often relies on computationally demanding nonlinear analyses. This study examines a displacement-based design (DBD) procedure for retrofitting RC buildings in Mendoza, Argentina, using hysteretic steel dampers. The method idealizes the retrofitted structure (existing frame and dampers acting in parallel) as an equivalent single-degree-of-freedom system. Equivalent damping is estimated through a closed-form formulation intended to capture the interaction between the original frame and the added devices. Three mid-rise regular RC buildings representative of the Cuyo region are considered. Retrofit solutions are assessed through nonlinear time-history analyses using far-field and near-field ground motions scaled by spectral matching. The results indicate that the procedure can achieve substantial reductions in global displacement demand and interstory drifts for the studied cases, and it tends to produce a more uniform drift distribution along the height at the design level. As expected, the retrofit increases base shear demand relative to the original structures. For the analyzed buildings and record set, peak drift estimates from the proposed procedure show close agreement with nonlinear dynamic results. The findings suggest that the approach may provide an efficient preliminary design tool for regular mid-rise RC frames with hysteretic dampers; however, its applicability should be verified for other structural configurations, irregularities, and broader ground-motion characteristics.