碳纤维布在桥梁空心板加固工程中的应用研究

Application Research of Carbon Fiber Sheet in Bridge Hollow Slab Reinforcement Project

该文开展桥梁空心板粘贴碳纤维加固研究,施工完成后开展桥梁静载和动载试验验证.静载试验结果显示各工况应变校验系数在0. 20.0. 8 8 之间,挠度校验系数在0. 9-0. 6 9 之间,均小于1 0 0 , 相对残余应变（应力）最大为0. 17,相对残余变位最大为0. 15,均满足规范小于等于0 . 2 0 的要求.脉动试验结果显示桥梁实测自振基频为5. 859Hz, 高于理论计算值4 9 15 H z,跑车、刹车试验与脉动试验结果吻合.载荷试验表明碳纤维加固桥梁空心板效果良好.

The application of carbon fiber–reinforced plastic(CFRP)to reinforce hollow board was investigated in the paper.Static dynamic load tests were performed after enforcement.Static load test results showed that the calibration coefficients of strain condition were between 0.20 and 0.88.The calibration coefficients of the deflection were between 0.19 and 0.69.All of these coefficients were less than 1.00.The relative residual strain had a maximum of 0.17.The relative residual displacement was up to 0.15,which met the requirements of less than 0.20.The pulsating test results showed the measured vibration base frequency of bridge was 5.859 Hz,higher than the calculated value 4.915 Hz.The running truck and braking test agreed to the pulsating test results,which showed that carbon fiber reinforcing hollow slab bridge had a good effect.It indicated that the application of the reinforcement technique was remarkable in bridge hollow slab.