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玻璃钢(FRP)筋防腐混凝土是一种强度高、全方位耐腐蚀的新型工程材料,具有十分广泛的应用前景。本文先对防腐混凝土梁采用四点弯曲试验方法,对FRP筋加强混凝土梁的弯曲长期力学特性进行了试验研究与分析,得到了梁在不同荷载水平作用下的蠕变曲线。结果表明,FRP筋不仅提高了防腐混凝土梁的初始刚度和强度,且明显降低了梁的蠕变变形。最后,运用最小二乘法确定蠕变模型参数,分别建立了防腐混凝土梁和FRP筋加强防腐混凝土梁的弯曲蠕变幂律模型,为估计材料的长期力学性能提供依据,对FRP筋防腐混凝土结构设计具有重要的价值。
FRP tendon anticorrosive concrete is a kind of new engineering material with high strength and corrosion resistance in all directions and has a very wide range of application prospects. In this paper, the four-point bending test method is applied to the anticorrosive concrete beam. The long-term bending mechanical behavior of FRP reinforced concrete beam is experimentally studied and analyzed, and the creep curve of the beam under different load levels is obtained. The results show that the FRP tendons not only improve the initial stiffness and strength of the anticorrosive concrete beam, but also obviously reduce the creep deformation of the beam. Finally, the parameter of creep model was determined by the method of least squares. The flexural creep power-law model of corrosion-resistant concrete beam and FRP reinforced concrete beam was established, which provided the basis for estimating the long-term mechanical properties of the material. Has important value.