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目前对碳纤维加固梁的研究大多是在完全卸载的情况下进行的,但在实际的加固工程中,往往做不到完全卸载,而且很多桥梁需要在使用过程中进行加固。钢筋混凝土梁在持荷情况下加固的物理力学性能不同于在完全卸载情况下的加固情况。着重研究了卸荷程度对损伤混凝土梁加固效果的影响,分析不同荷载等级下加固梁极限承载力、刚度和挠度以及钢筋和碳纤维协同工作的变化情况,为实际工程提供依据。
At present, the research on carbon fiber reinforced beams is mostly carried out under complete unloading. However, in practical reinforcement projects, unloading can not always be done and many bridges need to be reinforced during use. The physical and mechanical properties of reinforced concrete beams strengthened under load are different from those under complete unloading conditions. The effect of unloading degree on the reinforcement effect of damaged concrete beams is emphatically studied. The ultimate bearing capacity, stiffness and deflection of reinforced beams under different load classes and the changes of the cooperation between steel bar and carbon fiber are analyzed, which provide the basis for practical engineering.