某公路大桥引桥病害分析及加固设计

Disease Analysis and Reinforcement Design of Approach Bridge of a Highway Bridge

某公路大桥引桥经过多年运营后,在顶板、腹板、横梁出现了较严重的裂缝,影响了桥梁结构安全及正常使用.通过荷载试验及有限元计算,对病害产生的原因进行了深入研究.在此基础上运用张拉体外预应力束和在顶板粘贴钢板的加固方法,对引桥进行了加固,并利用荷载试验对加固后的效果进行了验证.

After many years of operation,serious cracks have appeared in the roof,web and crossbeam of the approach bridge of a highway bridge,which affect the safety and normal use of the bridge structure.Through the load test and finite element calculation,the causes of disease are further studied.On this basis,the approach bridge is strengthened by means of externally tensioned prestressed tendons and bonding steel plates to the roof.The effect after reinforcement is verified by load test.