Ground Motion Selection Criteria: CMS Approach

  • Unique Paper ID: 172898
  • Volume: 11
  • Issue: 9
  • PageNo: 1168-1175
  • Abstract:
  • Conditional-Mean-Spectrum (CMS) approach is elaborated & defined as a tool for the ground motion selection with contrast to structural engineers. Earlier traditional approaches for selecting ground motion criteria and their evolution, have set a platform to generate ‘Conditional Mean Spectrum (CMS)’ approach, proposed by Jack W. Baker1. Uniform-Hazard spectrum based on ‘PSHA’ determines various numbers of deterministic response spectra while CMS deals the mean value of response spectra, which is conditioned on a single target spectral acceleration of the structure’s fundamental period (T*). In this technical note, a brief discussion on, ‘Why adopt CMS over UHS’ is answered. Also steps to apply CMS approach is discussed with examples based on Indian site conditions.

Copyright & License

Copyright © 2025 Authors retain the copyright of this article. This article is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

BibTeX

@article{172898,
        author = {CEng. Parvesh Deepan},
        title = {Ground Motion Selection Criteria: CMS Approach},
        journal = {International Journal of Innovative Research in Technology},
        year = {2025},
        volume = {11},
        number = {9},
        pages = {1168-1175},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=172898},
        abstract = {Conditional-Mean-Spectrum (CMS) approach is elaborated & defined as a tool for the ground motion selection with contrast to structural engineers. Earlier traditional approaches for selecting ground motion criteria and their evolution, have set a platform to generate ‘Conditional Mean Spectrum (CMS)’ approach, proposed by Jack W. Baker1. Uniform-Hazard spectrum based on ‘PSHA’ determines various numbers of deterministic response spectra while CMS deals the mean value of response spectra, which is conditioned on a single target spectral acceleration of the structure’s fundamental period (T*). In this technical note, a brief discussion on, ‘Why adopt CMS over UHS’ is answered. Also steps to apply CMS approach is discussed with examples based on Indian site conditions.},
        keywords = {Conditional Mean Spectrum (CMS), Uniform Hazard Spectrum (UHS), Predicted Median Spectrum (PMS), Probabilistic Seismic Hazard Analysis (PSHA), Design hazard level, Design response spectra (DRS).},
        month = {February},
        }

Cite This Article

  • ISSN: 2349-6002
  • Volume: 11
  • Issue: 9
  • PageNo: 1168-1175

Ground Motion Selection Criteria: CMS Approach

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