| 摘要: |
| 对钢纤维掺量（体积分数）分别为0%，03%，10%，17%，24%的活性粉末混凝土(RPC)圆柱体试样(436×130mm)在5档围压(0，10，20，40，70MPa)下进行了常规三轴试验.结果表明：围压对RPC试样的抗压强度、变形能力及破坏形态影响显著；在单轴加载时，钢纤维掺量对RPC试样的抗压强度、变形能力及破坏形态都有影响；在轴向加载过程中维持围压分别为10，20，40和70MPa时，钢纤维仅对RPC试样的破坏形态有影响，对其抗压强度和变形能力几乎没有影响.分别用Mohr Coulomb准则与Willam Warnke模型拟合了所测抗压强度数据，拟合结果表明Willam Warnke模型能更好地描述RPC试样的抗压强度发展规律. |
| 关键词: 活性粉末混凝土 常规三轴试验 围压 钢纤维掺量 Mohr Coulomb准则 Willam Warnke模型 |
| DOI：103969/j.issn.1007 9629201802006 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51279003，51078024) |
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| Effect of Confining Pressure and Steel Fiber Volume Content on MechanicalProperty of Reactive Powder Concrete |
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WU Licheng1, WANG Zhe1, LIU Di1, ZHU Haohui2, LU Yuan1, LIN Lu3
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1.School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;2.Zhengzhou Public Rental Housing Operations Center Co., Ltd., Zhengzhou 450000, China;3.Anhui Transport Consulting & Design Institute Co., Ltd., Hefei 230088, China
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| Abstract: |
| The reactive powder concrete(RPC) cylinder samples(436×130mm) with five steel fiber volume contents(0%,03%,10%,17% and 24%) were researched by conventional triaxial test under five confining pressures(0,10,20,40,70MPa). According to the analysis of acquired data, confining pressure has obvious influence on the compressive strength, deformation and failure pattern of RPC. The effect of steel fiber volume content on the compressive strength, deformation and failure pattern of RPC under uniaxial condition was also obtained. When loading with constant confining pressure at 10,20,40,70MPa respectively, steel fiber volume content only has influence on the failure pattern, and has no apparent influence on the compressive strength and deformation. Compared the fitting result by using Mohr Coulomb criterion with Willam Warnke model, it shows that Willam Warnke model is more suitable to describe the compressive strength development of RPC. |
| Key words: reactive powder concrete(RPC) conventional triaxial test confining pressure steel fiber volume content Mohr Coulomb criterion Willam Warnke model |
