本文選題：鹽腐蝕　切入點：混凝土　出處：《爆炸與沖擊》2017年04期 　論文類型：期刊論文

【摘要】：為探究混凝土受鹽腐蝕后的動態(tài)力學(xué)響應(yīng),配置了粉煤灰質(zhì)量分數(shù)為15%的普通硅酸鹽水泥混凝土,將其置于質(zhì)量分數(shù)均為15%的NaCl和Na_2SO_4溶液中浸泡腐蝕60d后,利用?100mm分離式霍普金森壓桿實驗裝置,測試其受腐蝕后的動態(tài)力學(xué)性能,并結(jié)合宏觀唯象損傷統(tǒng)計理論和Weibull分布思想,建立了混凝土受鹽腐蝕后的動態(tài)統(tǒng)計損傷本構(gòu)模型。結(jié)果表明:受鹽腐蝕后,混凝土試件的動態(tài)抗壓強度均有不同程度的下降,且NaCl溶液腐蝕試件的降幅大于Na_2SO_4溶液腐蝕試件;模型曲線與實驗曲線的擬合度較高,能夠較準確地描述混凝土在沖擊荷載作用下的動態(tài)力學(xué)響應(yīng)規(guī)律。
[Abstract]:In order to investigate the dynamic mechanical response of concrete after salt corrosion, ordinary Portland cement concrete with 15% mass fraction of fly ash was placed in NaCl and Na_2SO_4 solution with 15% mass fraction for 60 days. The dynamic mechanical properties of 100mm split Hopkinson pressure bar after corrosion were tested, and the macroscopic phenomenological damage statistics theory and Weibull distribution thought were combined. The dynamic statistical damage constitutive model of concrete after salt corrosion is established. The results show that the dynamic compressive strength of concrete specimens decreases in varying degrees after salt corrosion, and the decrease of NaCl solution corrosion specimen is greater than that of Na_2SO_4 solution corrosion specimen. The fitting degree between the model curve and the experimental curve is high, which can accurately describe the dynamic mechanical response of concrete under impact load.
【作者單位】： 空軍工程大學(xué)機場建筑工程系;解放軍理工大學(xué)爆炸沖擊防災(zāi)減災(zāi)國家重點實驗室;西北工業(yè)大學(xué)力學(xué)與土木建筑學(xué)院;中央軍委后勤保障部建筑工程規(guī)劃設(shè)計研究院;
【基金】：國家自然科學(xué)基金項目(51078350,51208507) 爆炸沖擊防災(zāi)減災(zāi)國家重點實驗室開放課題(DPMEIKF201406) 陜西省青年科技新星計劃項目(2013KJXX-81)
【分類號】：TU528
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本文編號：1596397