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<p>Conventional approaches to seismic design often rely on deterministic models and overlook the influence of soil-structure interaction (SSI) and parametric uncertainties in evaluating the effectiveness of shear wall configurations. Existing studies seldom quantify structural reliability across various wall positions using probabilistic metrics. This research introduces a reliability-based optimization (RBO) framework to evaluate the placement of reinforced concrete (RC) shear walls in mid-rise buildings, explicitly incorporating SSI effects and uncertainty in seismic loading and material properties. Eight structural configurations are assessed using nonlinear direct-integration time history analysis under spectrum-matched earthquake records, with SSI modeled via Winkler-type foundation springs. A First Order Reliability Method (FORM) is employed to compute reliability indices for both strength and serviceability. Results reveal that centrally located shear walls improve serviceability performance, while corner wall configurations are superior in stress resistance. This study contributes to seismic risk mitigation by providing quantitative, reliability-informed guidance on shear wall placement for earthquake-prone regions.</p>

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Enhancing seismic performance of RC buildings: a reliability-based approach to shear wall positioning

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年9月15日

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

摘要

Conventional approaches to seismic design often rely on deterministic models and overlook the influence of soil-structure interaction (SSI) and parametric uncertainties in evaluating the effectiveness of shear wall configurations. Existing studies seldom quantify structural reliability across various wall positions using probabilistic metrics. This research introduces a reliability-based optimization (RBO) framework to evaluate the placement of reinforced concrete (RC) shear walls in mid-rise buildings, explicitly incorporating SSI effects and uncertainty in seismic loading and material properties. Eight structural configurations are assessed using nonlinear direct-integration time history analysis under spectrum-matched earthquake records, with SSI modeled via Winkler-type foundation springs. A First Order Reliability Method (FORM) is employed to compute reliability indices for both strength and serviceability. Results reveal that centrally located shear walls improve serviceability performance, while corner wall configurations are superior in stress resistance. This study contributes to seismic risk mitigation by providing quantitative, reliability-informed guidance on shear wall placement for earthquake-prone regions.