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UHPC弯拉性能及应力裂缝宽度关系

XIONG Wei, XU Bin,NIE Lili

Journal of Wuhan University of Technology(Transportation Science & Engineering)（2023）

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Abstract
通过超高性能混凝土(UHPC)棱柱体的三点弯曲试验,研究了长直型、端勾型和混合型钢纤维在不同纤维掺量下对UHPC弯拉性能的影响.结果表明:在2％ ～3.5％ 的掺量范围内,UHPC的极限强度随纤维掺量增加而持续显著增强.纤维类型对极限强度的影响不明显,混合型纤维U H PC的极限强度与长直型的比值介于0.99～1.01,而端勾型与长直型之比为0.94～1.03.倒推分析法UHPC的应力-裂缝宽度关系表明,在同一裂缝宽度下,混合型纤维UHPC表现出的应力水平最低.
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