Accession Number:

AD0625732

Title:

EFFECTS OF STRUCTURAL COMPRESSIBILITY ON ACTIVE AND PASSIVE ARCHING IN SOIL-STRUCTURE INTERACTION

Descriptive Note:

Final rept.

Corporate Author:

UNITED RESEARCH SERVICES CORP BURLINGAME CA

Personal Author(s):

• Mason, Harold G.

Report Date:

1965-11-01

Pagination or Media Count:

157.0

Abstract:

The basic theory of static active and passive arching is reviewed, and theoretical relationships describing the effect that structural geometry length to span has on the load on the structure, are developed. Equations are developed for passive and active arching for deeply buried idealized compressible cylindrical structures vertically oriented. Linear and nonlinear soil conditions are investigated. Equations are also derived to predict the load on a trap door resulting from differential strains occurring between the trap door and the bottom of the soil bin in the deeply buried condition. Both active and passive arching cases and linear and nonlinear soil conditions are considered. A limited experimental program was conducted to investigate the effects of the ratio of the soil to structural compressibility on the load on the structure. Good correlations are shown between the results of this study and the theoretical predictions employing soil parameters measured in normal laboratory soil tests. Similar correlations are also shown between the results of a trap door experimental study and the theoretical predictions. The relationship between rate of loading and the rate of structural response was shown to be a controlling factor in determining whether the loading or unloading stress-strain relationship governs the arching behavior.

Descriptors:

• *STRUCTURES
• *SOIL MECHANICS
• *UNDERGROUND STRUCTURES
• STRESSES
• NUCLEAR EXPLOSIONS
• LOADS(FORCES)
• SHELTERS
• STRAIN(MECHANICS)
• EQUATIONS
• BLAST
• DOORS

Subject Categories:

• Soil Mechanics
• Structural Engineering and Building Technology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE