【摘要】 对5根以FRP筋为有粘结预应力筋、以普通钢筋为非预应力筋的预应力混凝土梁受弯性能进行试验研究。根据试验结果对预应力FRP筋混凝土梁受力过程、破坏模式及裂缝情况进行了较为详细的研究。测定了梁的极限承载力、变形发展及裂缝分布等情况。试验研究结果表明:与预应钢绞线混凝土梁相比,预应力CFRP筋混凝土梁具有很好的变形能力而极限承载力相差不多,但是预应力AFRP筋混凝土梁承载力较低。通过计算得到的极限承载力、挠度与试验结果吻合较好。更多还原

【Abstract】 The flexural performance of prestressed concrete beams with bonded FRP tendons and ordinary steel bars were investigated experimentally.The detailed studies on the flexural performance,failure modes as well as the crack distribution are conducted by loading 4 beam-specimens.In these tests,ultimate bearing capacity,deflection,crack initiation and their growth were measured.A method for calculating the flexural bearing capacity and the short-term stiffness are proposed.The static test programs show that the action of FRP tendons enhance the deflections performance of the beams,while the difference of ultimate bearing capacity is quite little between the prestressed concrete beams with bonded CFRP tendons and with steel strands.But the ultimate bearing capacity of the beams with AFRP tendons is lower.Analysis and experiment results including ultimate bearing capacity and deflection are given to demonstrate the validation of the proposed calculating method.更多还原