Repair Project of Existing Suspension Bridges for Long Lifespan

摘要

Large scale suspension bridges are very important infrastructures for supporting national economic activities. However, recently regarding suspension bridges that were built more than 30 years ago, the decline in durability due to local damage from aging is a concern. Since replacing suspension bridges is very costly, it is common and reasonable to try prolonging bridge lifespans by repairing and reinforcing the damaged part of the bridge. Against this backdrop, projects involving existing suspension bridges for the purpose of increasing the lifespan have been increasing. This report describes three major projects carried out by IHI Infrastructure Systems Co., Ltd. worldwide.