摘要
CFRP(Carbon Fiber Reinforced Polymer)与混凝土之间的界面黏贴强度是影响CFRP-混凝土组合梁弯曲性能的一个重要因素。文中按CFRP布的黏结长度不同建立了3组不同界面强度的数值模型。模拟了采用位移控制梁的四点弯曲加载过程,分析了界面强度对CFRP-混凝土组合梁宏观弯曲性能的影响。结果表明:界面强度对组合梁的宏观承载力与开裂前刚度影响甚微;但对梁开裂后的刚度与延性影响较大;黏结长度越长,CFRP-混凝土组合梁对界面强度变化的敏感性越大。
The interracial bond strength between CFRP （carbon fiber polymer） and concrete is an important factor for bending properties of CFRP-concrete composite beam. Three groups of numerical models are established based on the different bond length and interfacial strength . Four-point bending loading processes controlled by displacement are simulated. Influence of Interface Strength on Bending Properties of CFRP-concrete beam has been discussed. The results show that the interface strength has little effect on the macro-bearing capacity and the stiffness of composite beams pre-cracking, but significant effect on stiffness and ductility after cracking, and it also reflected that the longer CFRP is stuck, the more sensitive to the changes of the interfacial strength.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第6期68-72,共5页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学基金资助项目(51278136)
广东省科技计划资助项目(2011B050300019)
广东省高等学校高层次人才资助项目(2050205)
关键词
CFRP
界面强度
组合梁
黏结
敏感性
CFRP
interface strength
composite beam
bonding
sensitivity
