王 嵩,劉潤清,趙 碩,孫斯慧
王嵩,劉潤清,趙碩,等.玄武巖纖維混凝土動態力學性能及數值模擬[J].混凝土與水泥制品,2022(7):64-68.
WANG Song, LIU Run-qing, ZHAO Shuo,et al.Dynamic Mechanical Properties and Numerical Simulation of Basalt Fiber Reinforced Concrete[J].China Concrete and Cement Products,2022(7):64-68.
玄武巖纖維混凝土動態力學性能及數值模擬
王 嵩,劉潤清,趙 碩,孫斯慧
王嵩,劉潤清,趙碩,等.玄武巖纖維混凝土動態力學性能及數值模擬[J].混凝土與水泥制品,2022(7):64-68.
WANG Song, LIU Run-qing, ZHAO Shuo,et al.Dynamic Mechanical Properties and Numerical Simulation of Basalt Fiber Reinforced Concrete[J].China Concrete and Cement Products,2022(7):64-68.
摘 要:為了研究沖擊荷載作用下玄武巖纖維(BF)對混凝土性能的影響,采用分離式霍普金森壓桿(SHPB),在0.6 MPa沖擊氣壓作用下對不同BF體積摻量(0、0.05%、0.10%、0.15%、0.20%、0.25%、0.30%、0.35%)玄武巖纖維混凝土(BFRC)進行了沖擊壓縮試驗,并基于試驗數據,選用修正后的HJC本構模型對動態沖擊過程進行了模擬。結果表明:BFRC相較于素混凝土具有更好的抗沖擊性能,且0.30%體積摻量的BF對混凝土的增韌效果最好;修正后的HJC模型可以較好地反映出BFRC的應力、應變狀態,體現BFRC破壞過程中裂紋的發展規律,模擬結果與試驗結果吻合較好。
Abstract: In order to study the effect of basalt fiber (BF) on the performance of concrete under impact load, the impact compression test of basalt fiber reinforced concrete(BFRC) with different volume content of BF (0, 0.05%, 0.10%, 0.15%, 0.20%, 0.25%, 0.30%, 0.35%) was carried out by using split hopkinson pressure bar(SHPB) under the impact pressure of 0.6 MPa. Based on the test datas, the modified HJC constitutive model was selected to simulate the dynamic impact process. The results show that the BFRC has better impact load resistance than plain concrete, and BF with 0.30% volume content has the best toughening effect on concrete. The modified HJC model can better reflect the stress and strain state of BFRC and reflect the crack development law in the failure process of BFRC. The simulation results are in good agreement with the experimental results.
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