Open Access. Powered by Scholars. Published by Universities.®
Civil and Environmental Engineering Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
- Publication Type
Articles 1 - 2 of 2
Full-Text Articles in Civil and Environmental Engineering
A Comparison Of Half And Quarter Space Penetration Into Granular Media, Ivan L. Guzman, Magued Iskander, Stephan Bless
A Comparison Of Half And Quarter Space Penetration Into Granular Media, Ivan L. Guzman, Magued Iskander, Stephan Bless
Publications and Research
In this study, two experimental techniques are compared for the purpose of visualizing projectile penetration at speeds ranging between 60 and 150 m/s into granular media. The two techniques are half space penetration into a transparent synthetic soil surrogate and quarter space penetration of an opaque natural sand and transparent soil surrogate against an observation window. In both techniques a pneumatic projectile accelerator was employed to launch the projectiles, and high-speed imagery was employed to visualize the penetration events unintrusively. Transparency in transparent targets was achieved by saturating angular fused quartz with a refractive index matched pore fluid made of …
Decision-Making In Reuse Of Highway Bridge Foundations, Ehssan Hoomaan
Decision-Making In Reuse Of Highway Bridge Foundations, Ehssan Hoomaan
Dissertations and Theses
According to the 2019 National Bridge Inventory data from Federal Highway Administration, the average age of highway bridges in the U.S.A. is 45 years, with almost 43% of existing highway bridges being older than 50 years, and eight percent of all U.S. national highway bridges being in poor condition. Foundation and substructure of existing highway bridges (over land and water) may have significant functional values even after being under service for decades. Reusing an existing bridge foundation during the reconstruction of a bridge (e.g., major rehabilitation, retrofitting, replacement of superstructure and substructure, and addition/removal of a span) has the potential …