Optimization of Cross-Frame Design and Deck Materials in Horizontally Curved Steel I-Girder Bridges

Author

• Syed Muhammad Oan Naqvi, The University of Texas Rio Grande Valley

Date of Award

5-1-2026

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Civil Engineering

First Advisor

Jinwoo An

Second Advisor

Philip Park

Third Advisor

Li Ai

Abstract

Bridges are one of the essential components of the transportation system in the United States for providing safe and efficient mobility. Their design and maintenance are continuously evolving to resolve significant engineering challenges, particularly in achieving both structural efficiency and sustainability. This research aims to optimize both structural efficiency and sustainability for horizontally curved steel I-girder bridges. The first component investigates the role of cross-frame design in enhancing stability and load distribution during construction and service. A finite element modeling framework is used to evaluate the influence of spacing, type, skew, and continuity of cross-frames on stresses, displacements, and overall structural performance. The second component evaluates geopolymer concrete (GPC) as a sustainable alternative to ordinary Portland cement (OPC) for bridge decks. Structural performance is analyzed using finite element simulations and environmental and cost impacts are quantified through life cycle assessment (LCA) and cost analysis. The findings highlight recommendations for efficient cross-frame configurations that improve the performance of horizontally curved steel I-girder bridges and demonstrate the feasibility of geopolymer concrete decks as an environmentally sustainable alternative to conventional concrete. Together, these findings aim to advance both the structural optimization and sustainability of bridge design, contributing to the development of safer and more eco-friendly infrastructure.

Comments

Copyright 2026 Syed Muhammad Oan Naqvi. All Rights Reserved. https://proquest.com/docview/3371493395

Recommended Citation

Naqvi, S. (2026). Optimization of Cross-Frame Design and Deck Materials in Horizontally Curved Steel I-Girder Bridges [Master's thesis, The University of Texas Rio Grande Valley]. ScholarWorks @ UTRGV. https://scholarworks.utrgv.edu/etd/1965