基于内聚力模型的快速荷载下CFRP-混凝土界面剪切剥离模拟
PDF下载 (313)肖云逸,章子华.基于内聚力模型的快速荷载下CFRP-混凝土界面剪切剥离模拟[J].宁波大学学报(理工版),2020,33(4):82-88.DOI:
XIAO Yunyi,ZHANG Zihua.Numerical simulation of interfacial debonding between CFRP and concrete under rapid loading[J].Journal of Ningbo University(Natural Science & Engineering Edition),2020,33(4):82-88.DOI:
| Title: | Numerical simulation of interfacial debonding between CFRP and concrete under rapid loading |
| 作者: | 肖云逸, 章子华 |
| Author(s): | XIAO Yunyi, ZHANG Zihua |
| 关键词: | 快速荷载; 有限元分析; 界面剥离; 黏结性能 |
| Keywords: | CFRP; rapid loading; finite element analysis; interfacial debonding; bonding properties |
| 分类号: | TU528.572 |
| 文献标识码: | A |
| 摘要: | 鉴于纤维增强复合材料(Fiber Reinforced Polymer, FRP)已在混凝土结构加固中普遍应用, 能有效提高结构的承载和变形能力. 为揭示动载作用下FRP-混凝土界面的剥离机理, 本文基于ABAQUS平台, 采用内聚力模型模拟CFRP-混凝土界面层, 实现了快速荷载下CFRP-混凝土界面剥离的高效模拟. 结果表明: CFRP表面应变在加载过程中由加载端向自由端方向传递, 随着加载速率的提高, 界面承载能力也随之提高; 界面峰值剪应力也存在显著的应变率效应; 模拟结果与试验结果基本吻合, 说明了新方法的有效性. |
| Abstract: | Externally bonded FRP has been widely used in the reinforcement of concrete structures, effectively improving the bearing capacity and deformation capacity of the structure. In order to reveal the mechanism of interfacial debonding under dynamic load, the interfacial debonding process between CFRP and concrete is effectively simulated by using the cohesive surface model in ABAQUS. Results show that the longitudinal strain of CFRP is transferred from the loading end to the free end during the loading process. The bearing capacity of the interface increases with the strain rate. The peak shear stress of the interface also possesses a significant strain rate effect.The numerical simulations is in good agreement with experimental observations, indicating the effectiveness of the proposed approach. |
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| 备注/Memo: | 收稿日期: 2019－09－20. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/基金项目: 浙江省自然科学基金（LY18E080013）第一作者: 肖云逸（1994－）, 男, 浙江宁波人, 在读硕士研究生, 主要研究方向: FRP加固混凝土结构. E-mail: 295369025@qq.com*通信作者: 章子华（1984－）, 男, 浙江宁波人, 博士/副教授, 主要研究方向: FRP加固混凝土结构. E-mail: zhangzihua@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
