Abstract

MALAVE, Rosa E et al. Evaluation of the corrosion in a railroad bridge as it contributes to the structural evaluation, diagnose and propose of rehabilitation. Rev. Téc. Ing. Univ. Zulia [online]. 2007, vol.30, n.Especial, pp.210-222. ISSN 0254-0770.

The object of the work was to investigate the damages by corrosion of a railroad bridge, to determine the advance of the corrosive process, its causes and to evaluate its possible rehabilitation. Its structure is type lauers, metalist with 71m of length and 30 years on service. The methodology was the inspection, the study of the descriptive memory of the bridge and with bases to these aspects the accomplishment of a series of tests. Also the atmosphere was evaluated, that is to say, temperature, humidity, factor of humectatión and wind speed. In the metallic elements a corrosion located in the inferior part of the bridge was observed, in the superior part the structure was observed in good state. With respect to the elements of reinforced concrete absence of cracks and fissures was observed in the support walls, nevertheless in the lateral walls was appraised a displacement. According to this evaluation the bridge can be rehabilitated. It was recommended to replace all bolt of the inferior zone, reinforcing the inferior beams of the segment and the two extreme cross-sectional beams of the bridge. The supports to be much deteriorated it were recommended to replace them.

Keywords : Metallic bridges; corrosion; to rehabilitate.