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发布时间：2020-01-06 00:00:00
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RPC本构关系及矩形RPC梁抗弯承载力研究
RPC Constitutive Relation and Ultimate Flexural Capacity of Rectangular RPC Beams
2020年第10期
活性粉末混凝土（RPC）；钢纤维；梁；力学性能；本构关系
Reactive powder concrete; Steel fibre; Beam; Mechanical property; Constitutive relationship
2020年第10期
10.19761/j.1000-4637.2020.10.055.06
国家自然科学基金项目（51608028）。
龙佩恒，黄琳艺，乔 宏，宋 浩，李 飞
北京建筑大学 土木与交通工程学院，北京100044

龙佩恒，黄琳艺，乔 宏，宋 浩，李 飞

摘   要：设计了3组不同配比活性粉末混凝土（RPC）试件，研究了钢纤维对RPC试件力学性能的影响，分析了RPC抗压本构关系，并提出了新的RPC抗拉本构方程。在此基础上设计了矩形梁抗弯承载力试验，研究了钢纤维对RPC梁的延性、韧性、承载力和抗裂性能的影响。结果表明：掺钢纤维RPC梁的开裂荷载、屈服荷载及极限承载力较未掺钢纤维RPC梁均提升了20%以上，构件的裂缝宽度能够控制在0.1 mm以内。

Abstract: 3 groups of reactive powder concrete(RPC) specimens with different mix proportions were designed, the influence of steel fiber on the mechanical properties of RPC specimens was studied, the compressive constitutive relationship of RPC was analyzed, and a new RPC tensile constitutive equation was put forward. On this basis, a rectangular beam flexural bearing capacity test was designed, and the influence of steel fiber on the ductility, toughness, bearing capacity and anti-cracking performance of RPC beams was studied. The results show that the crack load、 yield load and ultimate flexural capacity of RPC beams with steel fiber are increased by more than 20% compared with RPC beams without steel fiber, and the crack width of the members can be controlled to less than 0.1 mm.

龙佩恒,黄琳艺,乔宏,等.RPC本构关系及矩形RPC梁抗弯承载力研究[J].混凝土与水泥制品,2020(10):55-60.

LONG P H,HUANG L Y,QIAO H,et al.RPC Constitutive Relation and Ultimate Flexural Capacity of Rectangular RPC Beams[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):55-60.

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摘   要：设计了3组不同配比活性粉末混凝土（RPC）试件，研究了钢纤维对RPC试件力学性能的影响，分析了RPC抗压本构关系，并提出了新的RPC抗拉本构方程。在此基础上设计了矩形梁抗弯承载力试验，研究了钢纤维对RPC梁的延性、韧性、承载力和抗裂性能的影响。结果表明：掺钢纤维RPC梁的开裂荷载、屈服荷载及极限承载力较未掺钢纤维RPC梁均提升了20%以上，构件的裂缝宽度能够控制在0.1 mm以内。 Abstract: 3 groups of reactive powder concrete(RPC) specimens with different mix proportions were designed, the influence of steel fiber on the mechanical properties of RPC specimens was studied, the compressive constitutive relationship of RPC was analyzed, and a new RPC tensile constitutive equation was put forward. On this basis, a rectangular beam flexural bearing capacity test was designed, and the influence of steel fiber on the ductility, toughness, bearing capacity and anti-cracking performance of RPC beams was studied. The results show that the crack load、 yield load and ultimate flexural capacity of RPC beams with steel fiber are increased by more than 20% compared with RPC beams without steel fiber, and the crack width of the members can be controlled to less than 0.1 mm.
英文名 : RPC Constitutive Relation and Ultimate Flexural Capacity of Rectangular RPC Beams
刊期 : 2020年第10期
关键词 : 活性粉末混凝土（RPC）；钢纤维；梁；力学性能；本构关系
Key words : Reactive powder concrete; Steel fibre; Beam; Mechanical property; Constitutive relationship
刊期 : 2020年第10期
DOI : 10.19761/j.1000-4637.2020.10.055.06
文章编号 :
基金项目 : 国家自然科学基金项目（51608028）。
作者 : 龙佩恒，黄琳艺，乔 宏，宋 浩，李 飞
单位 : 北京建筑大学 土木与交通工程学院，北京100044

龙佩恒，黄琳艺，乔 宏，宋 浩，李 飞

摘   要：设计了3组不同配比活性粉末混凝土（RPC）试件，研究了钢纤维对RPC试件力学性能的影响，分析了RPC抗压本构关系，并提出了新的RPC抗拉本构方程。在此基础上设计了矩形梁抗弯承载力试验，研究了钢纤维对RPC梁的延性、韧性、承载力和抗裂性能的影响。结果表明：掺钢纤维RPC梁的开裂荷载、屈服荷载及极限承载力较未掺钢纤维RPC梁均提升了20%以上，构件的裂缝宽度能够控制在0.1 mm以内。

Abstract: 3 groups of reactive powder concrete(RPC) specimens with different mix proportions were designed, the influence of steel fiber on the mechanical properties of RPC specimens was studied, the compressive constitutive relationship of RPC was analyzed, and a new RPC tensile constitutive equation was put forward. On this basis, a rectangular beam flexural bearing capacity test was designed, and the influence of steel fiber on the ductility, toughness, bearing capacity and anti-cracking performance of RPC beams was studied. The results show that the crack load、 yield load and ultimate flexural capacity of RPC beams with steel fiber are increased by more than 20% compared with RPC beams without steel fiber, and the crack width of the members can be controlled to less than 0.1 mm.

龙佩恒,黄琳艺,乔宏,等.RPC本构关系及矩形RPC梁抗弯承载力研究[J].混凝土与水泥制品,2020(10):55-60.

LONG P H,HUANG L Y,QIAO H,et al.RPC Constitutive Relation and Ultimate Flexural Capacity of Rectangular RPC Beams[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):55-60.

摘要
参数
结论
参考文献
引用本文

摘   要：设计了3组不同配比活性粉末混凝土（RPC）试件，研究了钢纤维对RPC试件力学性能的影响，分析了RPC抗压本构关系，并提出了新的RPC抗拉本构方程。在此基础上设计了矩形梁抗弯承载力试验，研究了钢纤维对RPC梁的延性、韧性、承载力和抗裂性能的影响。结果表明：掺钢纤维RPC梁的开裂荷载、屈服荷载及极限承载力较未掺钢纤维RPC梁均提升了20%以上，构件的裂缝宽度能够控制在0.1 mm以内。

Abstract: 3 groups of reactive powder concrete(RPC) specimens with different mix proportions were designed, the influence of steel fiber on the mechanical properties of RPC specimens was studied, the compressive constitutive relationship of RPC was analyzed, and a new RPC tensile constitutive equation was put forward. On this basis, a rectangular beam flexural bearing capacity test was designed, and the influence of steel fiber on the ductility, toughness, bearing capacity and anti-cracking performance of RPC beams was studied. The results show that the crack load、 yield load and ultimate flexural capacity of RPC beams with steel fiber are increased by more than 20% compared with RPC beams without steel fiber, and the crack width of the members can be controlled to less than 0.1 mm.

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（1）通过试验验证了RPC抗压本构关系，并基于试验数据拟合提出了RPC抗拉本构关系公式。
（2）掺入钢纤维能提高RPC的延性和韧性，仅掺入1.5%的钢纤维能使RPC试件的抗折强度提升两倍左右。
（3）掺入钢纤维能抑制RPC梁的裂缝扩展，大部分裂缝宽度能够控制在0.1 mm以内。
（4）相比于未掺钢纤维的RPC矩形梁，掺入钢纤维的RPC矩形梁的开裂荷载、屈服荷载、极限荷载均提升20％以上。
（5）RPC在掺入钢纤维后表现出比较优异的力学性能，有望作为承重构件在工程中使用。

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龙佩恒,黄琳艺,乔宏,等.RPC本构关系及矩形RPC梁抗弯承载力研究[J].混凝土与水泥制品,2020(10):55-60.

LONG P H,HUANG L Y,QIAO H,et al.RPC Constitutive Relation and Ultimate Flexural Capacity of Rectangular RPC Beams[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):55-60.

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