混凝土弹塑性单轴受压分形损伤本构关系研究

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发布时间：2020-01-06 00:00:00

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混凝土弹塑性单轴受压分形损伤本构关系研究

Fractal Damage Constitutive Relation of Concrete Elastoplastic Uniaxial Compression

2022年第7期

混凝土；单轴受压；细观模型；分形损伤；本构关系

Concrete; Uniaxial compression; Mesoscopic model; Fractal damage; Constitutive relation

2022年第7期

10.19761/j.1000-4637.2022.07.025.06

国家自然科学基金项目（51879207）；西京学院高层次人才专项基金项目（XJ17B04）。

谢明1，汪鹏1，郑山锁2，刘佳豪1，王梓1，周静静1

1.西京学院土木工程学院，陕西西安 710123；2.西安建筑科技大学，陕西西安 710055

谢明1，汪鹏1，郑山锁2，刘佳豪1，王梓1，周静静1

谢明,汪鹏,郑山锁,等.混凝土弹塑性单轴受压分形损伤本构关系研究[J].混凝土与水泥制品,2022(7):25-29,39.

XIE M,WANG P,ZHENG S S,et al.Fractal Damage Constitutive Relation of Concrete Elastoplastic Uniaxial Compression[J].China Concrete and Cement Products,2022(7):25-29,39.

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1000

摘要：考虑混凝土单轴受压破坏机理，在混凝土静力损伤基础上引入弹簧-摩擦块模型，以模拟混凝土弹塑性阶段的细观结构变化。基于细观模型中弹簧、摩擦块对混凝土断裂面的影响，分析了混凝土受压损伤的破坏规律，建立了不同强度等级混凝土弹塑性单轴受压损伤本构模型，采用混凝土分形曲面模拟方法对所建模型进行了验证。结果表明：所建立的模型能够较好描述混凝土的塑性变形，对混凝土弹塑性的离散范围具有良好的预测能力。 Abstract: Considering the failure mechanism of concrete under uniaxial compression, on the basis of concrete static damage, a spring-friction block model was introduced to simulate the meso-structural changes of concrete in the elastic-plastic stage. Based on the influence of the spring and friction block on the fracture surface of concrete in the mesoscopic model, the failure law of concrete compressive damage was analyzed, and the elastic-plastic uniaxial compressive damage constitutive model of concrete with different strength grades was established. The model was verified by the concrete fractal surface simulation method. The results show that the established model can describe the impact of concrete plastic deformation well, and has a good ability to predict the elastoplastic dispersion range of concrete.

英文名 : Fractal Damage Constitutive Relation of Concrete Elastoplastic Uniaxial Compression

刊期 : 2022年第7期

关键词 : 混凝土；单轴受压；细观模型；分形损伤；本构关系

Key words : Concrete; Uniaxial compression; Mesoscopic model; Fractal damage; Constitutive relation

刊期 : 2022年第7期

DOI : 10.19761/j.1000-4637.2022.07.025.06

文章编号 :

基金项目 : 国家自然科学基金项目（51879207）；西京学院高层次人才专项基金项目（XJ17B04）。

作者 : 谢明1，汪鹏1，郑山锁2，刘佳豪1，王梓1，周静静1

单位 : 1.西京学院土木工程学院，陕西西安 710123；2.西安建筑科技大学，陕西西安 710055

谢明1，汪鹏1，郑山锁2，刘佳豪1，王梓1，周静静1

谢明,汪鹏,郑山锁,等.混凝土弹塑性单轴受压分形损伤本构关系研究[J].混凝土与水泥制品,2022(7):25-29,39.

XIE M,WANG P,ZHENG S S,et al.Fractal Damage Constitutive Relation of Concrete Elastoplastic Uniaxial Compression[J].China Concrete and Cement Products,2022(7):25-29,39.

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摘要

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结论

参考文献

引用本文

Abstract: Considering the failure mechanism of concrete under uniaxial compression, on the basis of concrete static damage, a spring-friction block model was introduced to simulate the meso-structural changes of concrete in the elastic-plastic stage. Based on the influence of the spring and friction block on the fracture surface of concrete in the mesoscopic model, the failure law of concrete compressive damage was analyzed, and the elastic-plastic uniaxial compressive damage constitutive model of concrete with different strength grades was established. The model was verified by the concrete fractal surface simulation method. The results show that the established model can describe the impact of concrete plastic deformation well, and has a good ability to predict the elastoplastic dispersion range of concrete.

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