Second Generation Ductile Hybrid Fiber Reinforced Polymer (FRP) for Concrete Structures

9713437哈里斯纤维增强塑料加固，已经在德雷克塞尔大学以韧性混合钢筋的形式进行了演示，该钢筋模拟了传统钢筋的应力-应变特性。 从高模量碳纤维和芳纶纤维的组合开始，研究人员已经生产出直径为5 mm的钢筋，其杨氏模量为133 Gpa，极限应变在2- 3%之间。 通过在钢筋中编织肋以增加混凝土与钢筋之间的机械相互作用，获得了良好的粘结。 试验结果表明，其延性指标与钢相当。 将使用较大尺寸的钢筋进行分析和实验研究计划。 ***

9713437 Harris Fiber reinforced plastic reinforcement, has been demonstrated at Drexel University, in the form of a ductile hybrid rebar which simulates the stress-strain characteristics of conventional steel reinforcement. Starting with a combination of high modulus carbon and aramic fibers, the researchers have produced a 5 mm diameter rebar with a Young's modulus of 133 Gpa, with an ultimate strain between 2-3%. Excellent bond was obtained by weaving ribs into the bar to increase the mechanical interaction between concrete and the rebar. Results from tests indicate that the ductility indices were comparable to steel. An analysis and experimental research program will be undertaken using larger size rebars. ***