本文選題：鋼管RPC + 高溫后��； 參考：《工程力學(xué)》2017年05期

【摘要】：采用ф74 mm分離式霍普金森壓桿(Split Hopkinson Pressure Bar,簡(jiǎn)稱SHPB)試驗(yàn)裝置對(duì)30塊高溫后的鋼管活性粉末混凝土(Reactive Powder Concrete-Filled Steel Tube,簡(jiǎn)稱鋼管RPC)進(jìn)行了不同應(yīng)變率的沖擊壓縮試驗(yàn),得到了高溫后鋼管RPC的動(dòng)態(tài)應(yīng)力-應(yīng)變關(guān)系和破壞形態(tài),提出了高溫后鋼管RPC動(dòng)態(tài)峰值應(yīng)力和峰值應(yīng)變預(yù)估方法。結(jié)果表明,高溫后鋼管RPC具有明顯的應(yīng)變率效應(yīng),經(jīng)歷高溫作用后的鋼管RPC仍保持較高的強(qiáng)度,較好的延性和整體性。含鋼率對(duì)鋼管RPC動(dòng)力性能有顯著影響,初始彈性剛度和峰值應(yīng)力隨含鋼率提高而明顯增大。理論計(jì)算結(jié)果與試驗(yàn)結(jié)果吻合良好,能夠較好預(yù)測(cè)高溫后鋼管RPC的動(dòng)態(tài)峰值應(yīng)力和峰值應(yīng)變。
[Abstract]:The shock compression tests of 30 reactive powder concrete filled steel tubes (RPCs) with different strain rates were carried out by using a split Hopkinson pressure bar (SHPB) with a split Hopkinson pressure bar of 74 mm and 30 reactive powder concrete tubes (RPCs) after high temperature. The dynamic stress-strain relationship and failure pattern of RPC after high temperature are obtained, and the prediction method of dynamic peak stress and peak strain of RPC after high temperature is put forward. The results show that RPC has obvious strain rate effect after high temperature, and the RPC of steel pipe after high temperature still maintains high strength, good ductility and integrity. The initial elastic stiffness and peak stress increase with the increase of the steel content. The theoretical results are in good agreement with the experimental results, which can be used to predict the dynamic peak stress and strain of RPC at high temperature.
【作者單位】： 解放軍理工大學(xué)爆炸沖擊防災(zāi)減災(zāi)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51378498,51578541,51321064) 江蘇省自然科學(xué)基金項(xiàng)目(BK20141066)
【分類號(hào)】：TU528

【相似文獻(xiàn)】

相關(guān)期刊論文 前2條

1 安鋼,孫波,肖如亭,王寧惠;RPC塔中第一階段終時(shí)形成氣泡體積的數(shù)學(xué)分析[J];天津理工學(xué)院學(xué)報(bào);1999年S1期

2 ;[J];;年期

相關(guān)碩士學(xué)位論文 前1條

1 劉丹;納米SiO_2對(duì)RPC力學(xué)性能影響的試驗(yàn)研究[D];西北農(nóng)林科技大學(xué);2012年

，

本文編號(hào)：2012471