[1]关 虓,牛荻涛,吴 博,等.纤维混凝土受压细观统计损伤本构模型研究[J].西安建筑科技大学学报：自然版,2015,47(05):678-683.[doi:DOI：10.15986/j.1006-7930.2015.05.012]
　GUAN Xiao,NIU Ditao,WU Bo,et al.Research on meso stochastic damage constitutive model of fiber concrete under compression[J].J.Xi’an Univ. of Arch. & Tech.：Natural Science Edition,2015,47(05):678-683.[doi:DOI：10.15986/j.1006-7930.2015.05.012]
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纤维混凝土受压细观统计损伤本构模型研究()
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西安建筑科技大学学报：自然版[ISSN:1006-7930/CN:61-1295/TU]

卷:
47
期数:
2015年05期
页码:
678-683
栏目:
出版日期:
2015-10-29

文章信息/Info

Title:
Research on meso stochastic damage constitutive model of fiber concrete under compression
文章编号:
1006-7930(2015)05-0678-06
作者:
关 虓; 牛荻涛; 吴 博; 王家滨
 西安建筑科技大学土木工程学院，西安 710055
Author(s):
GUAN Xiao ;  NIU Ditao ;  WU Bo;  WANG Jiabin
(School of Civil Engineering, Xi’an Univ. of Arch. & Tech., Xi’an 710055, China)
关键词:
细观统计损伤力学; Weibull 分布函数; 损伤本构模型; 塑性应变; 损伤阈值
Keywords:
microscopic statistical mechanics;  weibull distribution function;  damage constitutive model;  plastic strain;  damage threshold ; [1-3]
分类号:
TU528.07
DOI:
DOI：10.15986/j.1006-7930.2015.05.012
文献标志码:
A
摘要:
分别对31 个普通混凝土试块、38 个钢纤维混凝土试块及11 个聚丙烯纤维混凝土进行了单轴受压本构试验研究，采
用卡方检验方法对试验结果进行统计分析及假设检验，确定了以峰值应变为损伤变量的概型分布．基于唯象细观统计损伤力
学及热力学的相关理论，在传统模型基础上引入了损伤阈值概念，并研究了不同混凝土损伤阈值取值问题．同时，探讨了塑
性应变对本构模型的影响，建立了考虑塑性应变及损伤阈值的纤维混凝土单轴受压细观统计损伤本构模型．研究结果表明：
损伤变量较好的服从Weibull 分布函数；普通混凝土损伤阈值γ 为0.6 倍峰值应变，掺入纤维后，损伤阈值γ 提高为0.8 倍峰
值应变；所建立的本构模型能够有效地描述纤维混凝土的受压本构关系．
Abstract:
The stress-strain relationship experiments of different concrete under uniaxial compression were studied. The results of stress-strain experiments were analyzed by the method of Chi-square testing that the probability distribution of damage variable and related parameters were determined. The introduction of damage threshold based on the traditional Weibull random distribution of two parameters, and the range of damage threshold was discussed. Meanwhile, the influence of plastic strain on the constitutive model was discussed, and the meso stochastic damage constitutive model of fiber concrete under compression were established according to the phenol- menological microscopic statistical damage mechanics and thermodynamic theory. Results showed that the damage variable obeyed Weibull distribution, and the damage threshold of fiber concrete was greater than ordinary concrete. The given model of this paper helped describe the stress-strain curve of fiber concrete under uniaxial compression.

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备注/Memo

备注/Memo:
收稿日期：2015-01-30 修改稿日期：2015-10-10
基金项目：国家自然科学基金(51278403); 教育部创新团队(IRT13089) ——————————————— 收稿日期：2015-01-30 修改稿日期：2015-10-10
作者简介：关 虓(1984-)，男，博士生，主要从事研究E-mail: 86484869@qq.com682 西 安 建 筑 科 技 大 学 学 报（自然科学版） 第47卷
更新日期/Last Update: 2015-12-14