Study on Concrete Pier Impact Performance after Implementing Equal Cross-Section Stainless Steel with Protection from Closed-Cell Aluminum Foam

Figure 15

Time history curves of the strain of the No. 4 drop hammer when lifted to 6 m and 10 m. In the figure, diameter 16 is 50 mm closed-cell aluminum foam and diameter 20 is 100 mm closed-cell aluminum foam.

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