A team from the University of Nevada, Reno is exploring 3D printing options for the U.S. Army to more quickly build bridges and other infrastructure needed in conflict zones on site.
A printed, multi-part test bridge was able to support a load of 7,000 pounds.
A team from the university worked with the Construction Engineering Research Laboratory (CERL) of the US Army Engineer Research and Development Center (ERDC).
The pilot tested seven concrete segments, some 3 feet long, held together with prestressed cables under increasing weight.
The long-term plan is to print concrete components on site and assemble them manually. The structures could then be dismantled and rebuilt in new configurations.
Using a medium-sized U.S. Army printer, the team created a series of L- and T-shaped components and tested them with mathematical models.
“Integrating numerical modeling with 3D printing and segmental design provides a powerful tool for predicting structural performance before construction even begins,” said Associate Professor Sherif Elfass.
“This allows engineers to optimize segment placement and printed component design, ensuring printed structures meet required strength and durability requirements under various conditions.”
The project is funded until June 2025, with next steps including adding more components and connections and accelerating construction.