کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
268444 504435 2009 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Assessment procedure and rehabilitation of riveted railway girders: The Campasso Bridge
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Assessment procedure and rehabilitation of riveted railway girders: The Campasso Bridge
چکیده انگلیسی

The assessment and reclassification procedure of the Campasso Bridge, a 90-years old steel bridge typical of the beginning of the last century, is discussed in this paper. Steel is given a chemical and mechanical characterization on the basis of in situ and laboratory tests; a detailed survey of material degradation outlined the critical points of the structure and severe reductions of the resisting cross sections in several parts of the bridge. Load tests on the bridge, with accurate measurements of the displacements, allow validation of the theoretical model showing that, due to the dimensions of the nodes, the truss is better represented by a 3D frame rather than a 3D truss beam. The high level of redundancy of both the structure and the joints make the bridge safe according to the modern concepts of safety. The specific railway limits of the Serviceability Limit States mean that traffic must be limited to one rail only before re-opening the bridge to traffic. The skewness of the bridge (approx. 45∘) requires the torsional stiffness to be preserved by appropriate retrofitting works. Some considerations on fatigue limits show that the structure might be kept in service for not less than 20 years.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 31, Issue 1, January 2009, Pages 224–239
نویسندگان
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