摘要
设计构思一种全新的体外锚固FRP片材预应力加固方法,充分利用波形齿夹具锚的特点,采用两端先固定,再中间紧固,强迫FRP片材几何伸长产生预拉力。利用从成渝高速公路上拆除的桥梁旧构件,进行体外锚固碳纤维布预应力加固试验,试验结果证明,该方法施加预应力十分简单方便、工艺切实可行,无须专门的张拉设备,并且显著地提高了加固效果,具有十分广阔的推广应用前景。
An innovative external prestressing method was designed by anchoring carbon fiber sheet （CFS） to the structure. Several WSGG anchors were be used. The WSGG anchors were fixed first at both ends of CFS, and then other WSGG anchors were tightened. When the WSGG anchors in the middle of CFS were being tightened, the CFS was tensioned. To validate the present innovative prestressing method, nine aging beams were collected from the Cheng-Yu highway and three of them were strengthened by present method. It is conformed that the present method is simple and convenient, the technic is feasible, and the strengthening effect is visible.
出处
《土木工程学报》
EI
CSCD
北大核心
2007年第1期15-19,41,共6页
China Civil Engineering Journal
