预应力CFRP板加固混凝土桥梁研究与应用

STUDY AND APPLICATION OF LARGE-SCALE CONCRETE BEAMS STRENGTHENED WITH CFRP LAMINATE

采用专用的预应力施加机具和锚具对碳纤维增强聚合物(Carbon Fiber-Reinforced Polymer,以下简称CFRP)板施加了预应力,然后加固混凝土大比例梁,便于开展有关试验研究。在此基础之上,对一简支混凝土T型铁路桥进行了加固,效果较好。

Large scale concrete beams were strengthened by prestressing CFRP laminate with the special mechanical stressing and anchoring tools, then the strengthened beams were carried out to failure under the monotone load. On the basis of experimental resuhs, the prestressing technique is used to rehabilite a railway simply-supported concrete bridge. The strengthened effect is good through testing the change of crack width and the mid-span deflection.