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Background <p>Morocco is characterized by rich vernacular architecture and historical constructions built with rammed earth. Consequently, there is considerable interest in enhancing the performance of earthen constructions through rational development.</p> Materials and methods <p>The aim of this study is to assess the dynamic response of a historical rammed earth structure in southeast Morocco. To do so, an acquisition and processing system is developed. Structure’s dynamic parameters (frequency and damping) are determined using various temporal and frequency Operational Modal Analysis (OMA) methods. Subsequently, numerical modeling employing the finite element method (FEM) is performed to calibrate the analytical modal parameters and extract the mechanical properties of the rammed earth material.</p> Results <p>The results from all OMA methods show good agreement, with a maximum standard deviation not exceeding 3%. Following calibration, a good correlation between experimental and analytical results is achieved, with a relative error of approximately 1.27%.</p> Conclusion <p>Operational modal analysis methods provide reliable and stable estimates of modal parameters. The usefulness of these parameters is to determine the mechanical properties of the rammed earth material and to assess the seismic vulnerability of rammed earth structures.</p>

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Investigation of Dynamic Behavior of a Historical Rammed Earth Construction Under Ambient Vibration: Kasbah of Taourirt in Morocco as a Case Study

  • 期刊论文

  • 发表日期：

    2025年1月2日

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  • Mina Derife,
  • Sana Afnzar,
  • Said Aboumdian,
  • Abderrahman Atmani,
  • El Hassan Ait laasri,
  • Driss Agliz,
  • Mohamed Mouhine

摘要

Background

Morocco is characterized by rich vernacular architecture and historical constructions built with rammed earth. Consequently, there is considerable interest in enhancing the performance of earthen constructions through rational development.

Materials and methods

The aim of this study is to assess the dynamic response of a historical rammed earth structure in southeast Morocco. To do so, an acquisition and processing system is developed. Structure’s dynamic parameters (frequency and damping) are determined using various temporal and frequency Operational Modal Analysis (OMA) methods. Subsequently, numerical modeling employing the finite element method (FEM) is performed to calibrate the analytical modal parameters and extract the mechanical properties of the rammed earth material.

Results

The results from all OMA methods show good agreement, with a maximum standard deviation not exceeding 3%. Following calibration, a good correlation between experimental and analytical results is achieved, with a relative error of approximately 1.27%.

Conclusion

Operational modal analysis methods provide reliable and stable estimates of modal parameters. The usefulness of these parameters is to determine the mechanical properties of the rammed earth material and to assess the seismic vulnerability of rammed earth structures.