| 钢纤维高强混凝土单轴受压本构方程 |
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| 引用本文： | 焦楚杰,孙伟,秦鸿根,张亚梅,蒋金洋. 钢纤维高强混凝土单轴受压本构方程[J]. 东南大学学报(自然科学版), 2004, 34(3): 366-369 |
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| 作者姓名： | 焦楚杰 孙伟 秦鸿根 张亚梅 蒋金洋 |
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| 作者单位： | 东南大学材料科学与工程系,南京,210096;东南大学材料科学与工程系,南京,210096;东南大学材料科学与工程系,南京,210096;东南大学材料科学与工程系,南京,210096;东南大学材料科学与工程系,南京,210096 |
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| 基金项目： | 国家自然科学基金重点资助项目 (5 993 8170 )，解放军第二炮兵军事工程资助项目 |
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| 摘 要： | 采用微机控制电液伺服万能试验机，对纤维体积分数Vf为0～3％的钢纤维高强混凝土(SFRHSC)进行了单轴压缩试验，根据卖测的应力-应变曲线的特点提出了含2个参数A和B的单轴受压本构方程．A，B均随Vf的增大而增大，分别明确地反映了钢纤维对混凝土基体的增强和增韧能力．A越大，材料抗压强度fe与弹性极限应力的差值越大；B越大，曲线下降段越平缓．本文还给出了A，B与Vf，fe之间的关系式．
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| 关 键 词： | 钢纤维 高强混凝土 单轴压缩 本构方程 |
| 文章编号： | 1001-0505(2004)03-0366-04 |
Constitutive equation of SFRHSC under uniaxial compression |
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| Jiao Chujie Sun Wei Qin Honggen Zhang Yamei Jiang Jinyang. Constitutive equation of SFRHSC under uniaxial compression[J]. Journal of Southeast University(Natural Science Edition), 2004, 34(3): 366-369 |
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| Authors: | Jiao Chujie Sun Wei Qin Honggen Zhang Yamei Jiang Jinyang |
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| Abstract: | Uniaxial compression experiments for the steel fiber reinforced high strength concrete (SFRHSC) were conducted by using a multifunction servocontrolled testing machine. The volume fraction V f of steel fibers of SFRHSC ranges from 0 to 3%. On the basis of the stress-strain curves the constitutive equations were established. These equations satisfy all the characteristics of those curves. The equations have two key parameters A and B . Both A and B increase as V f increases,which clearly shows that the strength and toughness of the matrix are enhanced by steel fibers. The larger the A , the greater the difference between the compressive strength f c and elastic limit stress;the larger the B , the flatter the descending portion of the curve. Finally,the mathematical expressions of A,B and V f,f c are also presented. |
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| Keywords: | steel fiber high strength concrete uniaxial compression constitutive equation |
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