预应力混杂C/G布加固板梁桥的受力性能研究  

Mechanical Behavior of the Slab Bridge Reinforced with Prestressed C/G Sheets

作　　者：苏林[1] 方太云[2] 张剑[3] 陈雄飞[1] 汪锋[1] 艾军[3] 

机构地区：[1]江苏扬子大桥股份有限公司,江苏南京214521 [2]江苏省交通运输厅工程质量监督局,江苏南京210001 [3]南京航空航天大学,江苏南京210016

出　　处：《新技术新工艺》2016年第11期44-46,共3页New Technology & New Process

基　　金：江苏扬子大桥股份有限公司资助项目(GCJS2014-37);江苏省自然科学基金资助项目(BK20130787)

摘　　要：对空心板采用预应力C/G布加固,计算结果表明,通过闭合裂缝,提高了梁的有效刚度,恢复或部分恢复了梁的刚度,保证了桥梁的正常使用功能。板梁底张拉C/G布为钢筋卸载,延长了桥梁的疲劳寿命。在荷载作用下,纤维布上产生了弹性应变,且应变随着荷载的增加而增大,表明纤维布参与板受力而发挥了作用。纤维布与混凝土能够协同工作,预应力纤维布主动加固效果较为显著。预应力C/G布为板梁桥提供了一种新的加固方法,可供工程加固设计参考。While the prestressed C/G sheet is used to reinforce the hollow slab, the calculation results have been studied. Through restoring the closed fracture stiffness of the member, the effective stiffness of the beam can be improved, the stiffness of the beam is restored or partially restored, and the normal using function of the bridge can be improved. The C/ G sheet of the bottom of the plate beam is loaded with the steel bar to prolong the fatigue life of the bridge. Under the load action, the elastic strain is produced on the fiber sheet. With the increase of the load, the strain increases which indicates that the fiber sheet plays a role in the stress of the plate. Fiber sheet and concrete can work together. The prestress effect of the fiber sheet is obviously achieved. The prestressed C/G sheet is a new method to reinforce the slab bridge, which can be used for engineering reinforcement design.

关 键 词：预应力混杂C/G纤维布 板梁桥 受力性能 有限元 

分 类 号：U441[建筑科学—桥梁与隧道工程]