Structure performance optimization of double-layer aluminum foam sandwich panels under rockfalls impact

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (5) : 85-91.

CHEN Peng1, LI Wei2, ZHAI Min-gang3 WANG Dong-po4

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Abstract

Excellent energy-absorption property of aluminum foam sandwich (AFS) structure is the crucial to ensure the safety and stability of bridge piers against rockfalls in mountainous areas. In order to analyze the effect of AF core thickness on energy-absorption performance of AFS panels, laboratory compression tests and dynamic finite element analysis were performed. The results showed that a double-layer AFS panel has a better energy absorption performance than a single-layer AFS one does under the same loading condition; for double-layer AFS panels, increasing the upper layer or/and the lower layer AF core thickness can effectively improve their energy absorption performance; the performance is no longer significant when core thickness increases to a certain threshold; an optimized proportion of AF core thickness is Tupper:Tlower = 3:2. The study results were applied to the demonstration project of YU Zixi bridge piers, the protection effect was remarkable.

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rockfalls impact / aluminum foam sandwich panel / energy absorption / structure optimization

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CHEN Peng1, LI Wei2, ZHAI Min-gang3 WANG Dong-po4. Structure performance optimization of double-layer aluminum foam sandwich panels under rockfalls impact[J]. Journal of Vibration and Shock, 2018, 37(5): 85-91

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