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<p>The construction of buildings on sloping terrain in seismically active regions presents significant challenges due to structural irregularities and soil-structure interaction (SSI). Understanding the seismic behavior of such buildings is crucial for improving structural resilience and ensuring safety. However, previous studies have primarily focused on flat-ground structures, often overlooking the effects of slope-induced irregularities and SSI. Additionally, limited research has been conducted on the comparative performance of different building configurations under seismic loading in hilly regions. To address this gap, this study investigates the seismic performance of regular and irregular buildings on sloping ground, analyzing configurations such as Step Back, Step Back Set Back, Split Foundation, and Split Foundation Set Back. A nonlinear time-history analysis is conducted using ETABS v16.2.1 to evaluate seismic responses, including base shear, lateral displacement, and fundamental time periods. The study incorporates SSI effects to assess how flexible-base conditions influence seismic performance compared to fixed-base structures. The results indicate that flexible bases significantly alter the dynamic behavior of buildings, reducing base shear while increasing lateral displacement and fundamental time periods. Furthermore, irregular structures exhibit higher torsional irregularity compared to regular configurations. These findings provide valuable insights for engineers and designers in designing more resilient buildings in sloped regions, contributing to safer construction practices in earthquake-prone areas.</p>

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Performance of buildings on sloping terrain: influence of structural configurations

  • 期刊论文

  • 发表日期：

    2025年5月7日

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  • Parash Kunwar Khand,
  • Prakash Poudel,
  • Amit Poudel

摘要

The construction of buildings on sloping terrain in seismically active regions presents significant challenges due to structural irregularities and soil-structure interaction (SSI). Understanding the seismic behavior of such buildings is crucial for improving structural resilience and ensuring safety. However, previous studies have primarily focused on flat-ground structures, often overlooking the effects of slope-induced irregularities and SSI. Additionally, limited research has been conducted on the comparative performance of different building configurations under seismic loading in hilly regions. To address this gap, this study investigates the seismic performance of regular and irregular buildings on sloping ground, analyzing configurations such as Step Back, Step Back Set Back, Split Foundation, and Split Foundation Set Back. A nonlinear time-history analysis is conducted using ETABS v16.2.1 to evaluate seismic responses, including base shear, lateral displacement, and fundamental time periods. The study incorporates SSI effects to assess how flexible-base conditions influence seismic performance compared to fixed-base structures. The results indicate that flexible bases significantly alter the dynamic behavior of buildings, reducing base shear while increasing lateral displacement and fundamental time periods. Furthermore, irregular structures exhibit higher torsional irregularity compared to regular configurations. These findings provide valuable insights for engineers and designers in designing more resilient buildings in sloped regions, contributing to safer construction practices in earthquake-prone areas.