钢纤维混凝土劈拉损伤演化方程的研究

齐锋; 党改红; 陈忠购

doi:10.13204/j.gyjz200906022

钢纤维混凝土劈拉损伤演化方程的研究

doi: 10.13204/j.gyjz200906022

1.
浙江林学院园林学院,杭州 311300

基金项目:

浙江省教育厅资助项目(Y200803660)

详细信息

作者简介:
齐锋，男，1976年9月出生，博士。E-mail:engineeringqi@163.com

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出版历程
- 收稿日期: 2008-09-02
- 刊出日期: 2009-06-20

STUDY ON DAMAGE DEVELOPMENT EQUATION OF STEEL FIBER CONCRETE UNDER SPLITTING LOAD

1.
School of Landscape Architecture and Art,Zhejiang Forestry Univ. ,Hangzhou 311300,China

摘要

摘要: 在Moelands-Reinhardt指数型本构模型的基础上，利用等效应变假设，得出钢纤维混凝土损伤演化方程。为消除损伤演化方程中单元特征长度参数的网格相关性，同时体现抗拉强度、断裂能对损伤演化方程的影响，进一步提出修正的钢纤维混凝土损伤演化方程。修正的损伤演化方程可综合反映钢纤维体积率和长径比对劈拉损伤演化的影响。通过对比劈拉试验轴向位移-轴向力曲线与由损伤演化方程控制的轴向位移-轴向力理论曲线，证明钢纤维混凝土损伤演化方程可基本体现其劈拉损伤演化的规律。
- 钢纤维混凝土 /
- 劈拉 /
- 损伤演化方程
Abstract: Based on Moelands-Reinhardt single parameter exponential constitutive equation,steel fiber concrete damage development equation is obtained using equivalent strain hypothesis.Modified damage development equation of steel fiber concrete is proposed for eliminating mesh correlation of element characteristic length and reflecting the action of tensile strength and fracture energy on the damage development equation.The modified damage development equation comprehensively reflects the action of steel fiber volume ratio and aspect ratio on damage development.Relation of displacement force is obtained by splitting test and theoretical relation of displacement-force obtained by damage FEM calculation.Through comparison of empirical D-P relation and theoretical D-P relation,damage development equation of steel fiber concrete is verified in this paper.
- steel fiber concrete /
- splitting /
- damage development equation

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参考文献(6)

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