Static and Dynamic Analysis of Structural Frameworks Comprised of Inflatable Arches and Beams
Abstract
This project investigated the behavior of large tent-like structures supported by pressurized arch-shaped tubes. These structures are to be used by the U.S. Army as temporary maintenance shelters for helicopters and airplanes. Similar structures exist, but they are much smaller than those required for this purpose. The aim is to develop a structure that can be separated into lightweight modules which would be easy to transport, deploy, and disassemble. One part of the research program involved a study of two pressurized arches that lean against each other. This configuration can be an effective component in supporting a fabric shelter. The behavior of single arch-tubes also was analyzed. Deflections, vibrations, and stability were investigated under various types of snow and wind loading conditions. Critical values of the loads were determined. The effects of changing material properties, temperature, and moisture were examined. A finite element model of the entire tent structure was developed. A numerical optimization study of the supporting arches was conducted. Finally, two physical models of the entire structure were constructed. They were placed in a wind tunnel and tested under various wind speeds and orientations. Then they were tested under simulated snow loads until failure occurred.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 30, 1998
- Accession Number
- ADA365376
Entities
People
- Rakesh K. Kapania
- Raymond H. Plaut
Organizations
- Virginia Tech