Test and numerical simulation of dynamic behavior of Reactive Powder Concrete-Filled Steel Tube after exposure to high temperatures

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (10) : 159-167.

GuoWeidong, Chen Wanxiang, Zhang Tao,Liang Wenguang

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Abstract

Dynamic behaviors of a group of 30 Reactive Powder Concrete-Filled Steel Tube (RPC-FST) specimens after exposure to high temperature under different impact loading are performed by using ø74 mm-Split Hopkinson Pressure Bar (SHPB).Dynamic stress-strain relationships and failure modes ofRPC-FSTspecimensare derived experimentally. The representative cylinder compressive strengths are obtained based on the temperature field simulated by using ANSYS code, and the dynamic behaviors of RPC-FST after exposure to high temperature are further simulated by using LS-DYNA code. Results show thatobvious strain rate effects can be observed in RPC-FST specimensunder impact loading, and RPC-FST still keepremarkable compressive strength, good ductility and integrity after exposure to high temperature. Furthermore, the deformation capabilities of RPC-FST after exposure to high temperature are increased. Simulated results based on *MAT_CONCRETE_DAMAGE_REL3 model are in good agreement with that of impact test, thus the ultimate strength of RPC-FST after exposure to high temperature can be estimatedaccurately.

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Reactive Powder Concrete-Filled Steel Tube / after exposure tohigh temperature / impact-resistant capacity / dynamic strength / numerical simulation

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GuoWeidong, Chen Wanxiang, Zhang Tao,Liang Wenguang. Test and numerical simulation of dynamic behavior of Reactive Powder Concrete-Filled Steel Tube after exposure to high temperatures[J]. Journal of Vibration and Shock, 2017, 36(10): 159-167

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