高温后钢管RPC的SHPB试验研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (10) : 134-139.

论文

高温后钢管RPC的SHPB试验研究

郭志昆，陈万祥，姜猛，邹慧辉

作者信息 +

SHPB teston Reactive Powder Concrete-Filled Steel Tube after exposure tohigh temperature

GUO Zhi-kun, CHEN Wan-xiang,JIANG Meng, ZOU Hui-hui

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文章历史 +

摘要

采用ø75mm分离式霍普金森压杆（Split Hopkinson Pressure Bar，SHPB）分别对常温、高温200℃和300℃后的钢管活性粉末混凝土（Reactive Powder Concrete-Filled Steel Tube，钢管RPC）及RPC进行冲击压缩试验，分析了应变率效应及温度效应对试件动态力学性能和破坏形态的影响。结果表明：高温作用后钢管RPC的韧性和相对韧性均随应变率的提高而增大，相同应变率下钢管RPC的韧性和相对韧性随过火温度提高而增大。冲击荷载作用下钢管RPC和RPC的破坏程度均随过火温度提高而降低，RPC发生脆性破坏而钢管RPC发生延性破坏。钢管RPC的吸收能随过火温度提高而增大，但RPC的吸收能受过火温度影响较小。钢管RPC和PRC的吸收能均随应变率的提高而增大。试件的吸能能力取决于能量吸收率的大小。

Abstract

Impact teston Reactive Powder Concrete-Filled Steel Tube (RPC-FST) and Reactive Powder Concrete (RPC) specimensafter exposure to high temperature (20℃, 200℃, 300℃)were performed by using ø75 mm-Split Hopkinson Pressure Bar (SHPB). The influences of strain rate effects and temperature effects on dynamic behaviors and failure modes of specimens were investigated.It indicated thatthe toughness andspecifictoughnessof RPC-FST increased as strain rates increased. The toughness and specific toughness of RPC-FSTunder the same impact loadingincreased as temperature increased. The failuresof RPC-FST and RPC under impact loadingtended to be unobvious as temperature increased, but brittle failures were observedin RPC while ductile failures in RPC-FST.The absorbed energies of RPC-FSTincreased as temperature increased, while the temperatures have nogreatinfluences on the maximum absorbed energies of RPC. The absorbed energies of RPC-FST and RPCboth increased as strain rate increased. The capacities of energy absorption were mostly depended on energy absorbency.

导出引用

郭志昆，陈万祥，姜猛，邹慧辉. 高温后钢管RPC的SHPB试验研究[J]. 振动与冲击, 2017, 36(10): 134-139

GUO Zhi-kun, CHEN Wan-xiang,JIANG Meng, ZOU Hui-hui. SHPB teston Reactive Powder Concrete-Filled Steel Tube after exposure tohigh temperature[J]. Journal of Vibration and Shock, 2017, 36(10): 134-139

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