Seismic Hazard Evaluation through Attenuation Law Derivation and Response Spectrum Design: Bangladesh Case Study

Year : 2025 | Volume : 12 | 03 | Page :
    By

    Md. Shariful Islam,

Abstract

Bangladesh, positioned at the confluence of the Indian, Eurasian, and Burma tectonic plates, faces significant seismic hazards due to its complex geological setting. This research focuses on formulating empirical attenuation relationships and Creating a design response spectrum for assessing seismic risks in Bangladesh, using data from ten large earthquakes with magnitudes ranging from 6. 7 to 7. 9. The study creates Ground Motion Prediction Equations (GMPEs) for various structural periods using the fundamental attenuation equation log A = k₁M + k₂log R + k₃. Using least-squares regression analysis, the coefficients k₁, k₂, and k₃ were estimated for ten distinct time periods ranging from 0.02 to 9.69 seconds. The method involved adjusting prediction equations tailored for each time period, doing matrix-driven computations in Excel, and methodically analyzing reaction acceleration data from recent earthquakes. This study created a design response spectrum for a possible earthquake with a magnitude of 7.0 occurring at a distance of 35. 0 km from the epicenter, this represents a realistic scenario for future earthquakes in Bangladesh. The study’s results indicate that the attenuation coefficients vary significantly depending on the period of ground motion. Moreover, the recently obtained equations provide precise predictions for response spectra and peak ground acceleration. In a nation that faces major earthquakes roughly every 100 to 120 years, this research offers essential methods for constructing buildings capable of withstanding seismic events. When it comes to earthquakes, Dhaka is among the most earthquake-prone cities worldwide.

Keywords: Attenuation relations, Ground Motion Prediction Equations, Design response spectrum, Seismic hazard assessment, Bangladesh seismicity, Earthquake engineering

How to cite this article:
Md. Shariful Islam. Seismic Hazard Evaluation through Attenuation Law Derivation and Response Spectrum Design: Bangladesh Case Study. Journal of Structural Engineering and Management. 2025; 12(03):-.
How to cite this URL:
Md. Shariful Islam. Seismic Hazard Evaluation through Attenuation Law Derivation and Response Spectrum Design: Bangladesh Case Study. Journal of Structural Engineering and Management. 2025; 12(03):-. Available from: https://journals.stmjournals.com/josem/article=2025/view=228637


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Ahead of Print Subscription Case Study
Volume 12
03
Received 17/07/2025
Accepted 04/10/2025
Published 06/10/2025
Publication Time 81 Days
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