Scholarlink

<p>Near-fault ground motion characteristics differ from far-fault with properties like high-energy pulse, higher PGV/PGA ratio and a distinctive pulse shape in the velocity time history. Such attributes of the near-fault record can significantly affect the response of a structure during an earthquake. This paper evaluates the seismic performance of low and mid-rise reinforced concrete (RC) special moment-resisting frames (SMRFs) under a suite of seventeen far-fault and seventeen near-fault ground motions. Fragility curves for code-compliant and non-compliant RC SMRFs are derived through a probabilistic-based methodology for slight, moderate, extensive and near collapse limit states. Results showed that near-fault records have a great potential to cause higher damage to both code-compliant and non-compliant structures than far-fault earthquake records. However, comparatively code-compliant frames performed substantially better and outclassed non-compliant frames with less damage under both near-fault and far-fault ground motions. The non-compliant SMRFs that typically exist in developing countries and have low-strength concrete and unconfined beam-column joints are at serious risk in future earthquakes. In addition, these low and mid-rise code-compliant and non-compliant SMRFs are further retrofitted using eccentric steel braces (ESB) and their fragility and vulnerability curves are developed.</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

Seismic Vulnerability Assessment of Low and Mid-Rise RC Bare and ESB Retrofitted SMRFs Subjected to Near and Far-Fault Earthquakes

  • 期刊论文

  • 发表日期：

    2025年3月2日

查看全文
  • Muhammad Shoaib Khan,
  • Muhammad Rizwan,
  • Ibrar Hussain,
  • Ayed Eid Alluqmani

摘要

Near-fault ground motion characteristics differ from far-fault with properties like high-energy pulse, higher PGV/PGA ratio and a distinctive pulse shape in the velocity time history. Such attributes of the near-fault record can significantly affect the response of a structure during an earthquake. This paper evaluates the seismic performance of low and mid-rise reinforced concrete (RC) special moment-resisting frames (SMRFs) under a suite of seventeen far-fault and seventeen near-fault ground motions. Fragility curves for code-compliant and non-compliant RC SMRFs are derived through a probabilistic-based methodology for slight, moderate, extensive and near collapse limit states. Results showed that near-fault records have a great potential to cause higher damage to both code-compliant and non-compliant structures than far-fault earthquake records. However, comparatively code-compliant frames performed substantially better and outclassed non-compliant frames with less damage under both near-fault and far-fault ground motions. The non-compliant SMRFs that typically exist in developing countries and have low-strength concrete and unconfined beam-column joints are at serious risk in future earthquakes. In addition, these low and mid-rise code-compliant and non-compliant SMRFs are further retrofitted using eccentric steel braces (ESB) and their fragility and vulnerability curves are developed.