本文選題：鋼管RPC　切入點(diǎn)：高溫后　出處：《振動(dòng)與沖擊》2017年10期

【摘要】：采用φ74 mm分離式霍普金森壓桿(Split Hopkinson Pressure Bar,SHPB)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,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)。利用ANSYS軟件模擬了鋼管RPC截面溫度場(chǎng)分布,然后根據(jù)加權(quán)平均法得到高溫后鋼管RPC的軸心抗壓強(qiáng)度代表值,最后采用LS-DYNA軟件模擬了高溫后鋼管RPC動(dòng)態(tài)力學(xué)行為。結(jié)果表明,高溫200~300℃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,變形能力有所增強(qiáng)�；�*MAT_CONCRETE_DAMAGE_REL3模型的數(shù)值模擬結(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。
[Abstract]:The shock compression tests of 30 reactive Powder Concrete-Filled Steel tubes (RPCs) with high temperature were carried out by using a 蠁 74mm split Hopkinson Pressure Pressure SHPBs.The dynamic stress-strain relationship and failure mode of steel tube RPC after high temperature were obtained.The temperature field distribution of steel tube RPC section was simulated by ANSYS software, then the representative value of axial compressive strength of steel tube RPC after high temperature was obtained by weighted average method. Finally, the dynamic mechanical behavior of RPC after high temperature was simulated by LS-DYNA software.The results show that the steel tube RPC has obvious strain rate effect after high temperature 200 鈩，

本文編號(hào)：1710230