PSI - Issue 62

Ranaldo Antonella et al. / Procedia Structural Integrity 62 (2024) 145–152 Ranaldo A. et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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elements. For steel of reinforcing bars information archived are: steel type (smooth or ribbed bars), data source (nominal design value, acceptance certificates, or in-situ tests), bar shape (square or circular), bar diameter/side, yielding strength (f y ), tensile strength (f u ) and the ultimate elongation (A gt ). As for concrete: data source, cube side or cylinder dimensions, compressive strength (R c or f c ). Finally, for prestressing steel database reports: data source, specimen type (wire, strand, bar, dywidag bar, etc.), tensile strength (f ptk ), strength at 0.1% of residual deformation [f p(0,1)k ], strength at 0.2% [f p(0,2)k ] of residual deformation, strength at 1% of total deformation [f p(1)k ], elongation at the maximum strength (A gt ) and the maximum allowable stress (  s ). 4. First Results In the following, starting from the information archived into the database some preliminary results are shown. In particular, strength classes percentages for steel of reinforcing bars, concrete and prestressing steel are plotted and commented. It should be noted that all percentages reported are calculated by referring to the records number available in each records sample considered. Moreover, for brevity only results related to beams, cross-beams and piers are herein shown. However, it has been observed that for many bridges data available for all structural elements are not complete. a d

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Fig. 3. Steel classes breakdown obtained for: (a) beams; (b) cross-beams; (c) piers; (d) all structural elements; (e) all structural elements, only design nominal values; (f) all structural elements, only in-situ tests.