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Advisory Committee Chair

Fouad Fouad

Advisory Committee Members

Christopher Waldron

Muhammad Sherif

Document Type

Thesis

Date of Award

1-1-2025

Degree Name by School

Master of Science in Civil Engineering (MSCE) School of Engineering

Abstract

Steel lattice towers are essential structures used in power transmission, telecommunications, and wind turbine towers, where they must withstand various loads to ensure stability and durability. The foundation system plays a crucial role in supporting these towers, with different types chosen based on soil conditions, environmental factors, and project requirements. Traditional foundations, such as drilled shafts, spread footings, and steel grillages have been widely used but often come with challenges, including long installation times, high labor costs, and difficult site conditions. As demand for transmission infrastructure grows, there is a need for faster, more efficient, and environmentally friendly foundation solutions. Precast foundations offer a promising alternative by significantly reducing construction time while maintaining high quality and durability. This research introduces a novel precast foundation design for lattice towers, which consists of a prestressed concrete shaft, a steel adapter, and a bolted connection to ensure secure load transfer. To assess its feasibility, three different steel adapter designs are analyzed numerically to evaluate their structural performance against different load cases. In addition to numerical modeling. A capacity interaction diagram is also developed to further understand the foundation’s response under different loading conditions. The evaluation of the adapters is also based on other factors such as material efficiency, cost, and ease of fabrication. This research aims to enhance the efficiency and practicality of precast foundations for lattice towers. The findings will contribute to modernizing infrastructure by providing a cost-effective, sustainable, and easy-to-install foundation alternative, addressing key challenges in transmission tower construction.

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