Reinforcement and Renovation of Old Transportation Facility Tubular Trusses

Reinforcement of old tubular trusses requires prioritizing the assessment of existing damage. Carbon fiber wrapping or steel plate bonding methods should be used to enhance the bearing capacity of critical nodes, combined with the addition of diagonal bracing to improve overall stability. Before construction, rust should be thoroughly cleaned and anti-rust paint applied to ensure the collaborative force exertion of new and old materials.

During the renovation, connection nodes should be optimized simultaneously, high-strength bolts replaced, and cracked welds repaired. Pre-stress correction should be applied to deformed trusses. After reinforcement, load tests are required for verification. The structure can only be restored to use after meeting the Auto-20 grade standard. A health monitoring system should also be added to extend its service life.