To develop the buffering structure for the bridge pier, etc., the energy absorption characteristics and deformation modes of unit crash boxes with hollow trabecular-honeycomb bionic core structure (beetle elytron plate, i.e., BEP) are investigated by compression experiments. The results show that: Comparing with the CON crash boxes, the BEP crash box possesses a rising and relatively stable force-displacement curve with high force values; the coordinated and uniform S-typed laminated compression deformation is developed in the BEP crash box. The influence of the amplitude of the sine wave deformation line (A) on the peak value and compressive force efficiency of the BEP crash box was investigated and A=1.0 is proposed as an optimal value of both BEP crash boxes. Under this condition, the main peak forces of BEP crash boxes are almost the same as those of the conventional crash box, but the EA and CFE values are 3 times higher. These results pointed out the direction for the application of BEP in the anti-collision field of bridge piers.
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