20.500.12556/DiRROS-17966 LCA and LCC assessment of UHPFRC application for railway steel bridge strengthening Most of the existing railway steel bridges are nowadays older than 70 years, experiencing serious aging and overload problems. Therefore they either need to be replaced or strengthened to fulfil the increased requirements. The main idea of strengthening existing steel bridges is considering the possibility of adding load bearing deck above the main girders without replacing them. In this particular case study, the original steel structure of the 9m long railway bridge was dismantled and transported to the laboratory for the experimental assessment and development of the new rehabilitation method. Based on the assessment results, a strengthening slab was designed using Ultra High Performance Fibre Reinforced Concrete (UHPFRC) formula. In the life cycle analysis, using LCC and LCA models, the comparison of the application of UHPFRC cast in-situ deck is compared to the bridge replacement solution, which was actually selected method by the owner. The executed solution used also a temporary bridge in order to enable continuous traffic, which has caused very high construction costs. In order to compare different options, we have additionally analysed a solution without a temporary bridge, which created three life cycle scenarios. Most important steps during the construction, exploitation and end-of-life stage have been taken into account and integrated into the LCA and LCC models. Finally the environmental, economy and societal impacts of three solutions were compared over the period of 60 years. The rehabilitation option with UHPFRC deck has shown by far the lowest direct and environmental cost while the user delay costs only after the period of 50 years are not the most convenient for users. Superior characteristics of UHPFRC enabled the optimization of the load bearing deck and by that a very low total used quantity of material resulting in minimum direct and indirect costs. railway steel bridge UHPFRC strengthening LCA LCC model jekleni železniški most UHPFRC ojačitev LCA LCC model true false true Slovenian National Building and Civil Engineering Institute Angleški jezik Slovenski jezik © 2021 Slovenian National Building and Civil Engineering Institute Neznano 2024-01-25 08:27:10 2024-01-25 08:34:01 2024-01-26 03:50:46 0000-00-00 00:00:00 2021 0 0 Nasl. z nasl. zaslona; Opis vira z dne 26. 5. 2021; Str. 137-144 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2021-01-01 624 64722691 60496131 coms2020-21-proceedings-2.pdf coms2020-21-proceedings-2.pdf Odprti dostop 1 9894BB38311A12D91AA0F5BC762F8F04 dc66fe7e73d90541ca75a2cf1068699e19fff13e036033718368717f7817fb84 27c8e7a9-bb53-11ee-b0d4-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24366 RAZ_Stipanovic_Irina_2021.pdf RAZ_Stipanovic_Irina_2021.pdf 1 C18366480843D2BEFCD7AE89927D4856 a83fe34fbc36aa93dbcda0c956cfc7de29a678284c62cf847ad40ec31fe284f8 1724cbd0-bb54-11ee-b0d4-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24371 https://www.zag.si/dl/coms2020-21-proceedings-2.pdf 0 10199cbf-bb54-11ee-b0d4-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24370 Zavod za gradbeništvo Slovenije 0 0 0