Modeling of Constitutive Relationship of Fiber Reinforced Cementitious Materials

纤维增强胶凝材料本构关系建模

• 批准号: 11650464
• 负责人: TSUBAKI Tatsuya
• 金额: $ 2.3万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650464/
• 关键词: Fiber reinforced material; Cementitious material; Constitutive model; Steel fiber; Mechanical properties; Combined stresses; Repeated loading

Modeling a constitutive relationship to express the behavior of fiber reinforced cementitious materials under various stress conditions was investigated in this research. The mechanical behavior of steel fiber reinforced concrete (SFRC) was experimentally studied and constitutive models were obtained based on the test results as summarized in the following.1. Deformational properties under uniaxial tension and shear :The peak load and the displacement at the peak are influenced by the fiber shape (i.e., indented straight type, hooked type and anchored type). The load-displacement curve of each fiber can be expressed by a multi-linear model. The overall behavior of SFRC is modeled by superimposing the behavior of each fiber and considering the interaction between fibers.2. Deformational properties under repeated loading :The effect of repeated loading on the load-displacement curve is different for each fiber type. The load-displacement relationship is expressed by a multi-linear model.3. Effect of fiber embedment length on the pullout properties :The peak load and the displacement at the peak are expressed by a bilinear model with respect to fiber embedment length. The effect of embedment length on the load-displacement curve and the AE event pattern depends on the fiber shape.

本研究建立了纤维增强水泥基材料在不同应力条件下的本构模型。对钢纤维混凝土的力学性能进行了试验研究，并根据试验结果建立了钢纤维混凝土的本构模型.单轴拉伸和剪切下的变形特性：峰值载荷和峰值位移受纤维形状的影响（即，锯齿直型、钩型和锚定型）。每根纤维的载荷-位移曲线可用多线性模型表示。通过叠加每根纤维的行为并考虑纤维之间的相互作用来模拟SFRC的整体行为。2.重复加载下的变形特性：对于每种纤维类型，重复加载对载荷-位移曲线的影响是不同的。荷载-位移关系采用多线性模型表示.纤维嵌入长度对拔出性能的影响：峰值载荷和峰值处的位移与纤维嵌入长度呈双线性关系。埋置长度对荷载-位移曲线和声发射模式的影响取决于纤维的形状。

项目成果

椿 龍哉: "鋼繊維補強コンクリートの一軸引張およびせん断に対する力学特性に及ぼす繊維特性の影響"コンクリート工学論文集. Vol.10, No.2. 109-118 (1999)

Tatsuya Tsubaki：“纤维性能对单轴拉伸和剪切下钢纤维混凝土力学性能的影响”混凝土工程杂志，第 10 卷，第 109-118 期（1999 年）。

T.Tsubaki: "Pullout Model for Steel Fiber Subjected to Repeated Loading"Proc.of the Second International Conference on Engineering Materials. (印刷中). (2001)

T.Tsubaki：“重复加载下的钢纤维拉拔模型”，第二届国际工程材料会议论文集（2001 年）。

Tatsuya Tsubaki, Hiroshi Yanagawa and Isao Ichihara: "Pullout Properties of Steel Fiber under Repeated Loading"Concrete Research and Technology. Vol.11, No.3. 89-96 (2000)

Tatsuya Tsubaki、Hiroshi Yanakawa、Isao Ichihara：“钢纤维在重复加载下的拔出性能”具体研究与技术。

椿龍哉: "鋼繊維補強コンクリートの一軸引張およびせん断に対する変形挙動のモデル化"コンクリート工学論文集. Vol.11,No.3. 29-38 (2000)

Tatsuya Tsubaki：“单轴拉伸和剪切下钢纤维混凝土变形行为的建模”，混凝土工程杂志，第 11 卷，第 3 期（2000 年）。

椿龍哉: "繰返し荷重を受ける鋼繊維の引抜け特性"コンクリート工学論文集. Vol.11,No.3. 89-96 (2000)

Tatsuya Tsubaki：“反复荷载下钢纤维的拉拔性能”《混凝土工程杂志》第 11 卷，第 89-96 期（2000 年）。