本文關鍵詞： 高溫 鋼管RPC 分離式Hopkinson壓桿 韌性 吸能特性　出處：《振動與沖擊》2017年10期 　論文類型：期刊論文

【摘要】：采用鋂75 mm分離式霍普金森壓桿(Split Hopkinson Pressure Bar,SHPB)分別對常溫、高溫200℃和300℃后的鋼管活性粉末混凝土(Reactive Powder Concrete-Filled Steel Tube,鋼管RPC)及RPC進行沖擊壓縮試驗,分析了應變率效應及溫度效應對試件動態(tài)力學性能和破壞形態(tài)的影響。結(jié)果表明:高溫作用后鋼管RPC的韌性和相對韌性均隨應變率的提高而增大,相同應變率下鋼管RPC的韌性和相對韌性隨過火溫度提高而增大。沖擊荷載作用下鋼管RPC和RPC的破壞程度均隨過火溫度提高而降低,RPC發(fā)生脆性破壞而鋼管RPC發(fā)生延性破壞。鋼管RPC的吸收能隨過火溫度提高而增大,但RPC的吸收能受過火溫度影響較小。鋼管RPC和PRC的吸收能均隨應變率的提高而增大。試件的吸能能力取決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.

【作者單位】： 解放軍理工大學爆炸沖擊防災減災國家重點實驗室;
【基金】：國家自然科學基金項目(51378498;51578541) 江蘇省自然科學基金項目(BK20141066)
【分類號】：TU528

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本文編號：1504528