作　　者： ; ; ; ;

机构地区： 广州大学土木工程学院

出　　处： 《中山大学学报（自然科学版）》 2012年第6期68-72,共5页

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.

关 键 词： 界面强度 组合梁 黏结 敏感性

领　　域： [一般工业技术]