Authors : Md. Ashfaqur Rahman; Sifwat Alvi Rahman

Volume/Issue : Volume 10 - 2025, Issue 6 - June

Google Scholar : https://tinyurl.com/26ndjs54

DOI : https://doi.org/10.38124/ijisrt/25jun006

Note : A published paper may take 4-5 working days from the publication date to appear in PlumX Metrics, Semantic Scholar, and ResearchGate.

Abstract : Bridges serve as critical transportation infrastructure, yet many older reinforced concrete bridges lack adequate seismic design, leaving them vulnerable to moderate earthquakes due to insufficient shear capacity, poor confinement, and limited transverse reinforcement. In seismically active Bangladesh—a river-dense region with no bridge-specific seismic code—this study addresses the gap by integrating (BNBC, 2020) hazard data with (AASHTO, 2020) LRFD design provisions for bridge substructures. The research evaluates soil-structure interaction effects, particularly on soft soils, and assesses seismic performance under varying earthquake intensities. Results demonstrate that AASHTO-compliant designs, adapted with BNBC seismic parameters, meet safety objectives for bridge piers in Bangladesh, providing a validated framework for regions lacking localized codes. Future work should explore advanced soil modeling and nonlinear time-history analysis to further refine seismic resilience.

Keywords : Seismic Performance, Bridge Substructure, Soil-Structure Interaction, AASHTO LRFD, BNBC 2020, Pushover Analysis, Fiber Hinges, Performance-Based Design, Bangladesh Bridges, Nonlinear Static Analysis.

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