Effect of Backfill Property and Airblast Variations on the External Loads Delivered to Buried Box Structures Page: 3
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Unclassified
SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered)UJUG.LIC, . I.IILUJ1i VIOL
REPOT DCUMNTATON AGEREAD INSTRUCTIONS
REPOT DCUMNTATON AGEBEFORE COMPLETING FOM
1. REPORT NUMBER 2. GOVT ACCESSION NO 3. RECIPIENT'S CATALOG NUMBER
Technical Report S-78-5
4. TITLE (and Subtitle) 5. TYPE OF REPORT & PERIOD COVERED
EFFECT OF BACKFILL PROPERTY AND AIRBLAST VARIA-
TIONS ON THE EXTERNAL LOADS DELIVERED TO BURIED Final Report
BOX STRUCTURES 6. PERFORMING ORG. REPORT NUMBER
7. AUTHOR(e) 8. CONTRACT OR GRANT NUMBER(e)
Jon E. Windham
John 0. Curtis
9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. PROGRAM ELEMENT, PROJECT, TASK
U. S. Army Engineer Waterways Experiment Station AREA & WORK UNIT NUMBERS
Soils and Pavements Laboratory Subtask SC062
P. 0. Box 631, Vicksburg, Miss. 39180 Work Unit 01
11. CONTROLLING OFFICE NAME AND ADDRESS 12. REPORT DATE
Director .June 1978
Defense Nuclear Agency 13. NUMBER OF PAGES
Washington, D. C. 20305 203
14. MONITORING AGENCY NAME & ADDRESS(Qf different from Controlling Office) 15. SECURITY CLASS. (of this report)
Unclassified
15a. DECLASSIFICATION/DOWNGRADING
SCHEDULE
16. DISTRIBUTION STATEMENT (of thae Report)
Approved for public release; distribution unlimited.
17. DISTRIBUTION STATEMENT (of the abstract entered in Block 20, if different from Report)
18. SUPPLEMENTARY NOTES
This research was sponsored by the Defense Nuclear Agency under Subtask
SC062, Work Unit 01, "Influence of Backfill on Structural Response."
19. KEY WORDS (Continue on reverse aide if necessary and identify by block number)
Air blast waves Dynamic response Overpressure
Backfills Finite element method Soil-structure interaction
Blast effects HONDO (Computer program) Surface explosions
Blast loads Loads (Forces) Underground structures
2. ABSTRACT (Ceantam - sevrm e. Ft nwesasy god fdentifr by block number)
The results of analytical studies are presented in which (i) the SAP IV
elastic finite-element (FE) code was used to perform modal analyses for a
rectangular structure in vacuo and embedded in different backfill materials,
and (2) a series of dynamic and static two-dimensional (2D), plane-strain,
FE, structure-medium interaction (SMI) code calculations were performed using
the HONDO code. The HONDO code SMI calculations were made to investigate the
effect of variations in (1) surface airblast loadings, and (2) constitutive
(Continued)DDj :A7 473 EDITION OF t NOV 65 IS OBSOLETE
Unclassified
SECURITY CLASSFICATION OF THIS PAGE (Whet Data Entered)
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Windham, Jon E. & Curtis, John O. Effect of Backfill Property and Airblast Variations on the External Loads Delivered to Buried Box Structures, report, June 1978; Vicksburg, Mississippi. (https://digital.library.unt.edu/ark:/67531/metadc303956/m1/3/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.