Accession Number:

AD0256345

Title:

DESIGN AND ANALYSIS OF STRUCTURAL ELEMENTS

Descriptive Note:

Corporate Author:

DUKE UNIV DURHAM N C

Personal Author(s):

Report Date:

1961-05-04

Pagination or Media Count:

1.0

Abstract:

Continued research is reported on the design and analysis of structural elements. The structures were manufactured using alternate 90 degrees lay-ups of 181A Volan glass cloth and Polyester Resin 4116. The 18 inch thick shells were composed of four hyperbolic paraboloidal panels, each of which is a combination of four typical quadrants. Two series of tests are described and discussed. The first series of tests indicate that the effect of lateral restraint is indeed significant. Total restraint may be a practical impossibility, but partial restraint may be realized by increasing edged members and lateral braces. The hyperbolic paraboloidal shell is approximately twice as rigid in the inverted position than in the normal position. The tests to failure indicate that this type of structure, in most cases, will buckle before it will fracture. This condition also calls for increased sections along the edges and ridges. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE