Application and experimental study of reinforcement method of pasting steel plates on RC arch bridges

摘要

The Shengli Bridge is a five-span continuous arch bridge constructed by Japanese 108 years ago in Dalian, China. Lacking of maintenance and repair, lots of longitudinal and transversal cracks are found on the bottom surfaces of arch ribs, as a consequence, steel bars are exposed and corroded extensively. Steel pasting method is adopted to enhance the structural bearing capacity and service performance after comprehensive comparison with other common repair methods for arch bridges. To validate and optimize the strengthening effect, and to look for a feasible construction technology applicable for reinforcement project of real bridge, destructive loading test was took on four reinforced concrete arch models, one of which without any reinforcement while other three strengthened by different measures including bonding steel plate, bonding steel plate combined with anchor bolts, and bonding I-steel plate, respectively. Results showed that cracking load of structures was effectively increased by each reinforcement measure; failure characteristic was remarkably improved with the existence of anchor bolts; while bearing capacity cannot be highly developed by merely bonding I-steel plate.