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| 弓形钢纤维增强水泥基材料断裂能模型 | |
| 引用本文： | 许碧莞,施惠生,JU Jianwen Woody. 弓形钢纤维增强水泥基材料断裂能模型[J]. 同济大学学报(自然科学版), 2010, 38(9): 1329-1334. DOI: 10.3969/j.issn.0253-374x.2010.09.014 |
| 作者姓名： | 许碧莞 施惠生 JU Jianwen Woody |
| 作者单位： | 1. 同济大学,先进土木工程材料教育部重点实验室,上海,200092;美国加州大学洛杉矶分校,土木与环境工程系,洛杉机,CA90095 2. 同济大学,先进土木工程材料教育部重点实验室,上海,200092 3. 美国加州大学洛杉矶分校,土木与环境工程系,洛杉机,CA90095 |
| 基金项目： | 国家"九七三"重点基础研究发展计划资助项目 |
| 摘 要： | 根据弓形钢纤维弯钩端变形情况对单根纤维拔出能量进行推导;应用概率统计方法综合评估了断裂面上各纤维的能量贡献,建立了相应的断裂能模型.试验验证表明,模型预测精度良好,且该断裂能模型与各细观参数,如纤维长度、弯钩端几何形状参数和水泥基体强度等密切相关,因此该模型不仅能用于预测弓形钢纤维增强水泥基材料的断裂能,还能用于该类材料的优化设计研究. |
| 关 键 词： | 弓形钢纤维 水泥基材料 单根纤维拉拔试验 细观参数 断裂能模型 |
| 收稿时间： | 2009-05-26 |
| 修稿时间： | 2010-06-18 |
Modeling Fracture Energy of Hooked End Steel Fiber Reinforced Cementitious Composites (HSFRCC) |
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| XU Biwan,SHI Huisheng and JU Jianwen Woody. Modeling Fracture Energy of Hooked End Steel Fiber Reinforced Cementitious Composites (HSFRCC)[J]. Journal of Tongji University(Natural Science), 2010, 38(9): 1329-1334. DOI: 10.3969/j.issn.0253-374x.2010.09.014 | |
| Authors: | XU Biwan SHI Huisheng JU Jianwen Woody |
| Affiliation: | Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education,Tongji University,Shanghai 20092,China;Department of Civil and Environmental Engineering,University of California,Los Angeles,CA90095,U.S.A.;Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education,Tongji University,Shanghai 20092,China;Department of Civil and Environmental Engineering,University of California,Los Angeles,CA90095,U.S.A. |
| Abstract: | To model fracture energy of hooked end steel fiber reinforced cementitious composite(HSFRCC),pullout energy of single hooked end steel fiber(HSF) with non-deformed/deformed hooked end was theoretically derived first.Then,statistic method was employed to estimate energy contributions from all HSFs on crack plane.Finally,experimental verification was carried out to verify the model validity and accuracy.Good performance was observed in comparison with experimental results.Moreover,it is shown that this model ... |
| Keywords: | hooked end steel fiber(HSF) cementitious composites single fiber pullout test meso-scale parameters fracture energy model |
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