Continuous Riveted Steel Truss Of Carrying Capacity And Disease Treatment

Routine use of the bridge test, visual inspection of a bridge, static load test and dynamic load test, and then calculated with the theoretical structure of the bridge static displacement, stress and vibration characteristics were compared, the operational state of the bridge has a clear understanding.Main contents and results, including:(1) Row of a riveted steel truss bridge for a visual inspection to check on the arch, cable bridge eccentric inspection, structural layout inspection, steel beams and rivets, cracks and corrosion checks, bearing checks and pier inspection, such as finite element software by midas Theoretical analysis of the bridge. Dead load of the bridge test and dynamic load test, and then calculated with the theoretical structure of the bridge static displacement, stress and vibration characteristics were compared to assess the operational status of the bridge(2) Theory and calculations show that the overall carrying capacity of the bridge, vertical stiffness, lateral stiffness to meet the regulatory requirements, flood control capacity to meet regulatory requirements. With 40Hz filter, beam lateral acceleration does not meet the requirements; with 25Hz filter, beam lateral acceleration does not meet the requirements. Pier 1, the lateral amplitude does not meet the "bridge inspection rules " often value requirements, the next level, and longitudinal stringers and transverse connection between the level of disease is more serious, Department of rods, rivets Lantou more paint off area, part of the longitudinal cross The level of joint angle under the horizontal leg brace rust away. Stretching across cross-stringer at the hinge plate in the pull-off, jumping up and down side stringer activity significantly.1# and 2# pier crack width over the "bridge inspection rules " limit.(3) Continuous Steel Truss on riveting analyzes the causes of disease. Bridge repairs lead to poor working conditions and coating failure, severe corrosion failure of the rivet, rod rust off. Thin steel plate hinge, leading to fracture.(4) Recommended treatment measures are:full paint steel beams, steel body with "Protection of railway steel bridges painting TB/T 1527-20046 of the coating system. Replacement cross-place stringer stretching across the hinge plate. Replacement of flat longitudinal section of the ramp cross-linked bar and transversely longitudinal pole. Failure to replace the bolt rivets.