Unclassified 



SECURITY CLASSIFICATION OF THIS PAGE fHhen Dais 



Inlered) 





REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



TR-874 



2. GOVT ACCESSION NO. 



DN04405 3 



3. RECIPIENT'S CATALOG NUMBER 



t. TITLE rand Subtille) 



DESIGN FOR IMPLOSION OF CONCRETE CYLINDER 

 STRUCTURES UNDER HYDROSTATIC LOADING 



5. TYPE OF REPORT a PERIOD COVERED 



Not final; Jul 78 - Mar 79 



6 PERFORMING ORG. REPORT NUMBER 



7. AUTHORfs; 



Harvey H. Haynes 



8- CONTRACT OR GRANT NUMBERfs; 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



CIVIL ENGINEERING LABORATORY 

 Naval Construction Battalion Center 

 Port Hueneme, California 93043 



10. PROGRAM ELEMENT. PROJECT, TASK 

 AREA a WORK UNIT NUMBERS 



3.1610-1 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Naval Facilities Engineering Command 

 Alexandria, Virginia 22332 



12. REPORT DATE 



August 1979 



13. NUMBER OF PAGES 



85 



14. MONITORING AGENCY NAME 8 ADDRESSf./ d.»aren/ /rom ControKins Oflici:) 



15. SECURITY CLASS, (ol this report) 



Unclassified 



15a. DECLASSIFICATION DOWNGRADING 

 SCHEDULE 



16. DISTRIBUTION STATEMENT (ol this Reporl) 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (ol :he abstract entered /n Slock 20. it diflerertt (rom Report; 



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Cor^tir^ue on reverse side if necessary and identUy by b(ock number) 



Concrete structures, pressure-resistant structures, concrete cylinders, implosion, submerged 

 concrete structures, undersea structures, unreinforced concrete, hydrostatic loading, 

 design guidelines, buckling. 



20. ABSTRACT (Continue on reverse side tl necessary and identity by b/ock number; 



This report presents updated design guides for both thick- and thin-walled concrete 

 cylinder structures under hydrostatic loading. The design approach for thick-walled cylinders 

 has been changed from that described in previous work to a semi-empirical basis; improve- 

 ments in implosion strength on the order of 10% are found. A test on a thick-walled 10-ft-diam 

 (3.05-m) structure loaded to failure in the ocean is reported. A major change in the guides is 



continued 



DD 1 jAN^a 1473 EDITION OF 1 NOV 65 IS OBSOLETE 



MBL/WHOI 



Unclassified 



FICATION OF THIS I 



03D1 DOMQlBb D 



