Influence of microclimate on the sustainability and reliability of weathering steel bridge

[摘要] Reliability and sustainability of bridge structures designed from weathering steel are influenced by the development of a sufficiently protective layer of corrosion products on its surface. The development of this protective layer is affected by several parameters such as air pollution around the bridge structure, the microclimate under the bridge, the location of surface within the bridge structure and the time of wetness. Design of structural details also significantly influences the development of the protective corrosion layer. The article deals with the results of the experimental tests carried out on the road bridge located in the city of Ostrava in the Czech Republic. The development of the protective corrosion layer on the surface of the bridge is significantly influenced by the intensive traffic under the bridge construction and the design solution of the bridge itself. Attention is focused mainly on the influence of chloride deposition on the protective function of the corrosion layer. Corrosion samples were placed on the bridge to evaluate the influence of the above-mentioned parameters. The deposition rate of chlorides spreading from the road to surfaces of the steel structure is also measured.

[发布机构] Department of Building Structures, Faculty of Civil Engineering, VSB - Technical University of Ostrava, L. Podeste 1875, Ostrava; 708 00, Czech Republic^1;SVUOM Ltd., U Mestanskeho Pivovaru 934/4, Prague 7; 170 00, Czech Republic^2

[效力级别] 运输工程

[关键词] Bridge constructions;Bridge structures;Chloride depositions;Corrosion products;Experimental test;Protective function;Protective layers;Structural details