4.2 Experimental Setup 

 4.2.1 Flume and structure 



The experiment was accomplished using two identical side-by-side 

 structures constructed in a flume measuring 61.1m long, 1.52 m wide, and 2.0 m high 

 (Figure 4.1). The structure cross sections are shown in Figures 4.2 and 4.3. Each 0.76- 

 m-wide structure was constructed on a flat bottom. The offshore concrete beach slope 

 was 1 V:20H. This steepness was selected to realistically produce severely breaking 

 waves in the vicinity of the strucmre toe. 



Wave Generator 



\ Offshore 



*' „-f Wave Gages 



Nearshore Wave Test 



Gages -.^ Structures vVave 



Absorber 



/ Mosa 



1V:44H 



Test Section -i 

 Viewing Window / 

 Rat 



-12.2 m- 



AFlit 



■ I' 11.3 m— — +-3m4*3.7iti>|»— 6 m— •■ 



Figure 4. 1 Flume profile for damage experiments 



Underlayer: passed 

 1.59 cm, retained 

 on 1 .27 cm 



30.5 cm 



Figure 4.2 Model structure cross section for damage experiments 



54 



