本文選題：鋼纖維高強混凝土 + 鋼纖維體積率　； 參考：《建筑結(jié)構(gòu)學報》2017年01期

【摘要】：將鋼纖維摻入高強混凝土中,可以改善高強混凝土的脆性,進而可提高結(jié)構(gòu)構(gòu)件的延性。為研究鋼纖維高強混凝土抗壓性能,分別對強度等級為C60和C80,鋼纖維體積率為0%、1.0%、1.5%和2.0%的鋼纖維高強混凝土進行立方體抗壓強度試驗以及單調(diào)和重復(fù)荷載作用下的軸心抗壓全過程試驗。試驗結(jié)果表明:隨著鋼纖維體積率的增大,混凝土強度基本沒有改變,但相應(yīng)于峰值應(yīng)力的應(yīng)變略有增加,而彈性模量稍有下降。在已有研究的基礎(chǔ)上,提出了適用的鋼纖維高強混凝土軸壓應(yīng)力-應(yīng)變曲線數(shù)學表達式和受重復(fù)荷載作用的鋼纖維高強混凝土的卸載曲線和再加載曲線表達式。所提出計算式得到的結(jié)果與試驗結(jié)果吻合較好,可為鋼纖維高強混凝土結(jié)構(gòu)的設(shè)計和非線性分析提供理論基礎(chǔ)。
[Abstract]:The brittleness and ductility of high strength concrete can be improved by adding steel fiber into high strength concrete. In order to study the compressive properties of steel fiber high strength concrete, Cubic compressive strength tests and axial compression tests of steel fiber high strength concrete with strength grades C60 and C80 and steel fiber volume ratio of 1.0% and 2.0% were carried out respectively under monotonic and repeated loads. The experimental results show that with the increase of steel fiber volume ratio, the strength of concrete remains unchanged, but the strain corresponding to the peak stress increases slightly, while the elastic modulus decreases slightly. On the basis of the previous research, the mathematical expressions of the stress-strain curve of steel fiber high strength concrete under axial compression and the expressions of unloading curve and reloading curve of steel fiber high strength concrete under repeated load are presented. The calculated results are in good agreement with the experimental results and can provide a theoretical basis for the design and nonlinear analysis of steel fiber reinforced high-strength concrete structures.
【作者單位】： 同濟大學土木工程防災(zāi)國家重點實驗室;江蘇省建筑設(shè)計研究院;
【基金】：國家自然科學基金重大國際合作項目(51261120377) 土木工程防災(zāi)國家重點實驗室基金項目(SLDRCE14-A-07)
【分類號】：TU528

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本文編號：1849481