Scholarlink

<p>​Buildings on hillside terrains with split foundations face severe seismic risks due to inherent vertical irregularities and torsional responses. While base isolation is a recognized mitigation strategy, its application for such complex geometries and the accurate modeling of isolation bearings under large deformations remain underexplored. This study bridges this gap by evaluating the seismic performance of hillside reinforced concrete buildings equipped with High-Damping Rubber Bearings (HDRBs), using the advanced Deformation History Integral (DHI) model to overcome the limitations of conventional models in capturing history-dependent hysteresis and strain-hardening. Finite element analyses were conducted for three configurations conventional Split Foundation (SF), Base-Isolated (SFIS), and Middle-Story Isolated (SFMIS) under a suite of scaled ground motions. The results demonstrate that isolation drastically improves performance: the SFIS configuration provides substantial mitigation, reducing the base shear by 60–75% and inter-story drift by 70–85%. The SFMIS configuration proved superior, achieving a 75–86% base shear reduction, maintaining drifts below 0.25%, and reducing superstructure displacements by 90–95% (a 30–50% further improvement over the SFIS). The DHI-modeled HDRBs were critical, with energy dissipation increasing by 200–300% as the seismic intensity increased, leading to 55–70% lower floor accelerations. This study establishes middle-story isolation as an effective strategy for new construction and validates base isolation for retrofits, underscoring the necessity of advanced constitutive models, such as the DHI, for realistic seismic performance assessment.</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 performance and energy dissipation of hillside reinforced concrete buildings isolated by high-damping rubber bearings: a DHI model-based study

  • 期刊论文

  • 发表日期：

    2026年1月8日

查看全文
  • Abdul Ghafar Wahab,
  • Tao Zhong

摘要

​Buildings on hillside terrains with split foundations face severe seismic risks due to inherent vertical irregularities and torsional responses. While base isolation is a recognized mitigation strategy, its application for such complex geometries and the accurate modeling of isolation bearings under large deformations remain underexplored. This study bridges this gap by evaluating the seismic performance of hillside reinforced concrete buildings equipped with High-Damping Rubber Bearings (HDRBs), using the advanced Deformation History Integral (DHI) model to overcome the limitations of conventional models in capturing history-dependent hysteresis and strain-hardening. Finite element analyses were conducted for three configurations conventional Split Foundation (SF), Base-Isolated (SFIS), and Middle-Story Isolated (SFMIS) under a suite of scaled ground motions. The results demonstrate that isolation drastically improves performance: the SFIS configuration provides substantial mitigation, reducing the base shear by 60–75% and inter-story drift by 70–85%. The SFMIS configuration proved superior, achieving a 75–86% base shear reduction, maintaining drifts below 0.25%, and reducing superstructure displacements by 90–95% (a 30–50% further improvement over the SFIS). The DHI-modeled HDRBs were critical, with energy dissipation increasing by 200–300% as the seismic intensity increased, leading to 55–70% lower floor accelerations. This study establishes middle-story isolation as an effective strategy for new construction and validates base isolation for retrofits, underscoring the necessity of advanced constitutive models, such as the DHI, for realistic seismic performance assessment.