高温后钢管RPC的SHPB试验研究

发布时间：2018-02-12 02:00

本文关键词： 高温钢管RPC 分离式Hopkinson压杆韧性吸能特性　出处：《振动与冲击》2017年10期 　论文类型：期刊论文

【摘要】：采用鋂75 mm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]:The americium 75 mm split Hopkinson pressure bar (Split Hopkinson Pressure Bar, SHPB) respectively in normal temperature, reactive powder concrete filled steel high temperature of 200 degrees and 300 degrees after (Reactive Powder Concrete-Filled Steel Tube, RPC and RPC steel) shock compression test, analyzed the effect of strain rate and temperature effect on the influence of specimen dynamic mechanics the performance and failure modes. The results show that the toughness of RPC steel after high temperature and relative toughness increases with strain rate increasing, the same strain rate RPC steel toughness and relative toughness with temperature increasing. It provided the extent of damage of steel RPC and RPC under impact load were decreased with the increasing of temperature. Reduce RPC, brittle fracture and ductile failure in steel pipe RPC. The absorption of RPC can increase with heating temperature increased, but the absorption of RPC by far temperature tube RPC and PRC steel. The absorption energy of the specimen increases with the increase of the strain rate. The energy absorption capacity of the specimen depends on the energy absorption rate.

【作者单位】：解放军理工大学爆炸冲击防灾减灾国家重点实验室;
【基金】：国家自然科学基金项目(51378498;51578541) 江苏省自然科学基金项目(BK20141066)
【分类号】：TU528

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