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    蘇州混凝土水泥制品研究院有限公司

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    發布時間:2020-01-06 00:00:00
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    超高強鋼筋ECC柱軸心受壓試驗研究
    Experimental Study on Axial Compression of ECC Columns with Ultra-high Strength Reinforced Steel
    2020年第10期
    超高強鋼筋;高延性水泥基復合材料;軸心受壓;應力-應變曲線;泊松比
    Ultra-high strength reinforcement bar; ECC; Axial compression; Stress-strain curve; Poisson′s ratio
    2020年第10期
    10.19761/j.1000-4637.2020.10.051.05
    國家自然科學基金項目(51678379)。
    汪知文1,李碧雄1,游 楊1,廖 橋1,饒 丹2,余 弦2
    1.四川大學 建筑與環境學院,四川 成都 610065;2.成都建工集團有限公司,四川 成都 610031

    汪知文1,李碧雄1,游 楊1,廖 橋1,饒 丹2,余 弦2

    摘 ? 要:對超高強鋼筋HRB500與高延性水泥基復合材料(ECC)矩形截面短柱進行了軸心受壓試驗,研究了配筋率為1.13%、2.26%的超高強鋼筋對ECC應力-應變曲線的影響。結果表明:ECC柱在破壞后依然能保持良好的整體性,且裂縫寬度明顯低于普通混凝土柱;超高強鋼筋ECC柱的縱向鋼筋均達到屈服強度,極限承載力和極限豎向應變均大于普通混凝土試件;超高強鋼筋與ECC混凝土之間的協同性明顯優于普通混凝土;ECC柱的泊松比隨著加載的進行先逐漸變小,然后有一定程度的增加。

    Abstract: The axial compression test of HRB500 and ECC rectangular section short column was carried out, and the effect of HRB500 with reinforcement ratio of 1.13% and 2.26% on the stress-strain curve of ECC column was studied. The results show that the ECC column can still maintain good integrity after failure, and the crack width is obviously lower than that of ordinary concrete column. The longitudinal reinforcement of ultra-high strength steel bar ECC column can reach yield strength, and the ultimate bearing capacity and ultimate vertical strain of ECC column are larger than those of ordinary concrete column. The synergy between ultra-high strength steel bar and ECC concrete is obviously better than that of ordinary concrete. The Poisson′s ratio of ECC column gradually decreases as the loading progresses, and then increases to some extent.

    汪知文,李碧雄,游楊,等.超高強鋼筋ECC柱軸心受壓試驗研究[J].混凝土與水泥制品,2020(10):51-54.

    WANG Z W,LI B X,YOU Y,et al.Experimental Study on Axial Compression of ECC Columns with Ultra-high Strength Reinforced Steel[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):51-54.

    瀏覽量:
    1000
    摘 ? 要:對超高強鋼筋HRB500與高延性水泥基復合材料(ECC)矩形截面短柱進行了軸心受壓試驗,研究了配筋率為1.13%、2.26%的超高強鋼筋對ECC應力-應變曲線的影響。結果表明:ECC柱在破壞后依然能保持良好的整體性,且裂縫寬度明顯低于普通混凝土柱;超高強鋼筋ECC柱的縱向鋼筋均達到屈服強度,極限承載力和極限豎向應變均大于普通混凝土試件;超高強鋼筋與ECC混凝土之間的協同性明顯優于普通混凝土;ECC柱的泊松比隨著加載的進行先逐漸變小,然后有一定程度的增加。 Abstract: The axial compression test of HRB500 and ECC rectangular section short column was carried out, and the effect of HRB500 with reinforcement ratio of 1.13% and 2.26% on the stress-strain curve of ECC column was studied. The results show that the ECC column can still maintain good integrity after failure, and the crack width is obviously lower than that of ordinary concrete column. The longitudinal reinforcement of ultra-high strength steel bar ECC column can reach yield strength, and the ultimate bearing capacity and ultimate vertical strain of ECC column are larger than those of ordinary concrete column. The synergy between ultra-high strength steel bar and ECC concrete is obviously better than that of ordinary concrete. The Poisson′s ratio of ECC column gradually decreases as the loading progresses, and then increases to some extent.
    英文名 : Experimental Study on Axial Compression of ECC Columns with Ultra-high Strength Reinforced Steel
    刊期 : 2020年第10期
    關鍵詞 : 超高強鋼筋;高延性水泥基復合材料;軸心受壓;應力-應變曲線;泊松比
    Key words : Ultra-high strength reinforcement bar; ECC; Axial compression; Stress-strain curve; Poisson′s ratio
    刊期 : 2020年第10期
    DOI : 10.19761/j.1000-4637.2020.10.051.05
    文章編號 :
    基金項目 : 國家自然科學基金項目(51678379)。
    作者 : 汪知文1,李碧雄1,游 楊1,廖 橋1,饒 丹2,余 弦2
    單位 : 1.四川大學 建筑與環境學院,四川 成都 610065;2.成都建工集團有限公司,四川 成都 610031

    汪知文1,李碧雄1,游 楊1,廖 橋1,饒 丹2,余 弦2

    摘 ? 要:對超高強鋼筋HRB500與高延性水泥基復合材料(ECC)矩形截面短柱進行了軸心受壓試驗,研究了配筋率為1.13%、2.26%的超高強鋼筋對ECC應力-應變曲線的影響。結果表明:ECC柱在破壞后依然能保持良好的整體性,且裂縫寬度明顯低于普通混凝土柱;超高強鋼筋ECC柱的縱向鋼筋均達到屈服強度,極限承載力和極限豎向應變均大于普通混凝土試件;超高強鋼筋與ECC混凝土之間的協同性明顯優于普通混凝土;ECC柱的泊松比隨著加載的進行先逐漸變小,然后有一定程度的增加。

    Abstract: The axial compression test of HRB500 and ECC rectangular section short column was carried out, and the effect of HRB500 with reinforcement ratio of 1.13% and 2.26% on the stress-strain curve of ECC column was studied. The results show that the ECC column can still maintain good integrity after failure, and the crack width is obviously lower than that of ordinary concrete column. The longitudinal reinforcement of ultra-high strength steel bar ECC column can reach yield strength, and the ultimate bearing capacity and ultimate vertical strain of ECC column are larger than those of ordinary concrete column. The synergy between ultra-high strength steel bar and ECC concrete is obviously better than that of ordinary concrete. The Poisson′s ratio of ECC column gradually decreases as the loading progresses, and then increases to some extent.

    汪知文,李碧雄,游楊,等.超高強鋼筋ECC柱軸心受壓試驗研究[J].混凝土與水泥制品,2020(10):51-54.

    WANG Z W,LI B X,YOU Y,et al.Experimental Study on Axial Compression of ECC Columns with Ultra-high Strength Reinforced Steel[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):51-54.

    摘要
    參數
    結論
    參考文獻
    引用本文

    摘   要:對超高強鋼筋HRB500與高延性水泥基復合材料(ECC)矩形截面短柱進行了軸心受壓試驗,研究了配筋率為1.13%、2.26%的超高強鋼筋對ECC應力-應變曲線的影響。結果表明:ECC柱在破壞后依然能保持良好的整體性,且裂縫寬度明顯低于普通混凝土柱;超高強鋼筋ECC柱的縱向鋼筋均達到屈服強度,極限承載力和極限豎向應變均大于普通混凝土試件;超高強鋼筋與ECC混凝土之間的協同性明顯優于普通混凝土;ECC柱的泊松比隨著加載的進行先逐漸變小,然后有一定程度的增加。

    Abstract: The axial compression test of HRB500 and ECC rectangular section short column was carried out, and the effect of HRB500 with reinforcement ratio of 1.13% and 2.26% on the stress-strain curve of ECC column was studied. The results show that the ECC column can still maintain good integrity after failure, and the crack width is obviously lower than that of ordinary concrete column. The longitudinal reinforcement of ultra-high strength steel bar ECC column can reach yield strength, and the ultimate bearing capacity and ultimate vertical strain of ECC column are larger than those of ordinary concrete column. The synergy between ultra-high strength steel bar and ECC concrete is obviously better than that of ordinary concrete. The Poisson′s ratio of ECC column gradually decreases as the loading progresses, and then increases to some extent.

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    (1)CON柱在軸心受壓破壞時通常發生混凝土剝落情況,裂縫開展充分;而ECC柱在受壓破壞時能保持良好的完整性,未出現混凝土剝落現象,且裂縫寬度明顯小于CON柱。
    (2)ECC柱中的縱向受力鋼筋與混凝土表面的荷載-應變曲線幾乎重合;相比于普通混凝土,ECC混凝土與超高強鋼筋的協同性更好。
    (3)CON柱在軸心受壓加載過程中的泊松比保持在0.17左右;ECC柱的泊松比隨著加載的進行逐漸變小,當試件接近破壞時,泊松比又有一定增加。

    (4)ECC混凝土與高強鋼筋組合時,縱向受力鋼筋能達到屈服狀態,實際抗壓承載力超過計算極限承載力,可為高強鋼筋與ECC混凝土結構設計及抗震設計提供參考。
     

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    汪知文,李碧雄,游楊,.超高強鋼筋ECC柱軸心受壓試驗研究[J].混凝土與水泥制品,2020(10):51-54.

    WANG Z W,LI B X,YOU Y,et al.Experimental Study on Axial Compression of ECC Columns with Ultra-high Strength Reinforced Steel[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):51-54.

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