FRP筋纤维混凝土受弯构件试验研究

现有采用FRP的受弯构件中， FRP作为主要纵向受拉材料，用量通常较大。这造成FRP筋混凝土构件成本较高，同时还因构件刚度不够导致其变形而非承载力成为设计的控制因素。为了充分发挥FRP材料良好的抗拉性能，建立了FRP筋纤维混凝土受弯构件。通过结构试验的方法研究纤维混凝土对FRP筋混凝土受弯构件延性及变形能力的影响。试验结果表明，纤维的增加能够有效提高FRP筋受弯构件的变形能力，解决了过去FRP筋受弯构件延性差导致配筋率过高的问题。基于FRP筋与钢筋材料上的差异，针对FRP筋混凝土构件建立了相应的延性设计指标。采用该指标对纤维混凝土构件进行分析后发现，随着纤维含量的增加， FRP筋混凝土受弯构件的延性有着明显提高。

An Experimental Study of Flexural Behaviour of FRP Reinforced Fiber Concrete Flexural Components

In the current FRP flexural components , FRP is used as longitudinal tensile materials with large quantity .There-fore, the construction cost is huge and the structural design is determined by deflection but not by strength , which is due to low stiff-ness.In this study, fiber concrete will be introduced to FRP reinforced concrete beams with the consideration of high tensile strength of reinforcing materials .The influences of fibers on ductility and deformation of FRP reinforced concrete flexural components is in -vestigated by experimental tests .It turns out that the increasing of fibers in concrete materials can enhance the deformation of FRP reinforced concrete beams in order to solve problems of high reinforcement percentages in FRP reinforced concrete flexural compo -nents caused by the low structural ductility .Due to the difference between FRP and steel , ductility factor for FRP reinforced con-crete structures is established .With this ductility factor , the increasing of fiber quantity can improve the ductility of FRP reinforced flexural elements .