Archive image from page 69 of Design for implosion of concrete. Design for implosion of concrete cylinder structures under hydrostatic loading . designforimplosi00hayn Year: 1979 initial shape initial membrane circle deflected shape deflected membrane circle w = displacement from initial to deflected shape Wj = displacement from mem- brane behavior Wu = displacement from bending w-j. = total displacement ARj = initial deviation in inside radius Figure B-17. Definition of displacement terms. When a deflected shape was plotted the reference point was the location of the center shaft that hel
Archive image from page 69 of Design for implosion of concrete. Design for implosion of concrete cylinder structures under hydrostatic loading . designforimplosi00hayn Year: 1979 initial shape initial membrane circle deflected shape deflected membrane circle w = displacement from initial to deflected shape Wj = displacement from mem- brane behavior Wu = displacement from bending w-j. = total displacement ARj = initial deviation in inside radius Figure B-17. Definition of displacement terms. When a deflected shape was plotted the reference point was the location of the center shaft that held the potentiometer; however, this location was not the 'true' center of the deflected shape. The opera- tion of finding the true center location was that of manually super- imposing the membrane curve on the deflected shape and using judg- ment to decide the location. Judgment was based on fitting the mem- brane curve (perfect circle) of known size to the deflected shape such that the area between the wavy line and the membrane curve was divided equally. The initial and deflected cross-sectional shapes of a free and simply supported specimen with their corresponding membrane circles are shown in Figures B-18 and B-19, respectively. All specimens having a free support deflected into an elliptical shape where the num- ber of lobes, n, was 2. All specimens having a simple support deflected into a shape with n = 3. 64
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