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REPORT DOCUMENTATION PAGE 



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1. REPORT NUMBER 



CETA 81-1 



2, GOVT ACCESSION NO 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE Cand Subtit/s; 



WAVE LOADING ON VERTICAL SHEET-PILE 

 GROINS AND JETTIES 



5. TYPE OF REPORT & PERIOD COVERED 



Coastal Engineering 

 Technical Aid 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfs; 



J. Richard Weggel 



8. CONTRACT OR GRANT NUMBERf»; 



PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CEREN-EV) 



Kingman Building, Fort Belvoir,. Virginia 22060 



F31232 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



12. REPORT DATE 



January 1981 



13. NUMBER OF PAGES 



17 



U. MONITORING AGENCY NAME a ADDRESSC// dltferenl from Controlling Otiice) 



15. SECURITY CLASS, (ol this report) 



UNCLASSIFIED 



16. DISTRIBUTION STATEMENT (ol thie Report) 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (ol the abstract entered In Block 20, If different from Report) 



16. SUPPLEMENTARY NOTES 



19. KEY WORDS (Continue 



ide if necessary and Identlly by block number) 



Groins Jetties Mach-stem reflection Wave loading Waves 



ABSTRACT (Continue on reverse aide If neceaaary and Identify by block number) 



A method is presented for calculating the distribution of force and over- 

 turning moment resulting from incident water waves moving along the axis of 

 a groin or jetty with vertical sides. Wave height at the structure is 

 determined from experimental data on t'lach-stem reflection. The distribution 

 of force is assumed to be in proportion to the nonlinear shallow-water wave 

 profile given by either the cnoidal or stream-function wave theory. An 

 example problem demonstrates how the cnoidal theory may be used to estimate 

 the wave force and overturning moment distribution along a structure. 



DD 



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