摘要
为深入了解碳纤维布加固钢筋混凝土梁的裂缝及界面性能,对外粘碳纤维布的钢筋混凝土梁受弯下的非线性全过程进行有限元模拟,其中混凝土采用多线性等向强化模型模拟,碳纤维布假定为线弹性,界面采用陆新征简化模型模拟.着重分析碳纤维布加固前后梁的裂缝分布及破坏形态、加固梁在不同载荷下碳纤维布的受力情况、碳纤维布与混凝土界面的粘结滑移机理.结果表明:通过以上分析,模型能较好地反映梁的受力全过程,与试验结果一致.
In order to get a deep understanding of RC beams reinforced with FRP sheet, the fracture process of a reinforced concrete beam strengthened by FRP subjected to bending was simulated. The concrete was simulated by the MISO model, FRP was assumed as linear elastic, and the interface was modeled using the simplified model by Lu. The crack distribution and failure pattern of the beam with or without reinforcement, the stress distribution of FRP under loading of different levels, and the mechanism of the concrete/FRP interface were analyzed specifically. Through the above analysis, the model reflects the whole loading process of RC beams and the result obtained by numerical simulation is consistent with result of experiment.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2014年第1期82-87,共6页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金资助项目(51009019
51109134)
