{"id":87341,"date":"2021-01-13T10:32:17","date_gmt":"2021-01-13T10:32:17","guid":{"rendered":"https:\/\/www.pbctoday.co.uk\/news\/?p=87341"},"modified":"2023-06-20T17:08:33","modified_gmt":"2023-06-20T16:08:33","slug":"scia-hracholusky-reservoir","status":"publish","type":"post","link":"https:\/\/www.pbctoday.co.uk\/news\/digital-construction-news\/bim-news\/scia-hracholusky-reservoir\/87341\/","title":{"rendered":"Case study: Replacement bridge over the Hracholusky reservoir"},"content":{"rendered":"

Structural engineering software specialist,\u00a0SCIA Engineer<\/a>\u00a0assists the complex analysis of a difficult construction process on the replacement bridge over the Hracholusky Reservoir<\/h2>\n

Software:\u00a0<\/strong>SCIA Engineer<\/a><\/p>\n

Construction End Date:\u00a0<\/strong>Apr-2019<\/p>\n

Country:\u00a0<\/strong>Czech Republic<\/p>\n

The bridge over the Hracholusky reservoir near the city of Plze\u0148 is a single-track railway bridge of 5 spans that was constructed in 1901. The 1st and the 5th spans are stone arches and the 2nd, 3rd and 4th spans are identical simply supported rivetted steel arch trusses with a top bridge deck.<\/p>\n

Due to extensive corrosion, the steel trusses had to be replaced in 2018-2019. The new steel superstructure is also a steel truss with a top bridge deck to resemble the original bridge. The replacement itself was a challenging task. Due to difficult accessibility from below the bridge, an innovative approach was applied. The spans were replaced one-by-one. For each span a new truss was pre-assembled and, in an upside-down position, moved onto the existing one. Then, the new and old trusses were clamped together and rotated around the longitudinal axis.<\/p>\n

The structural model was created from a detailed Tekla file that was, after some modifications, imported to SCIA\u00a0Engineer\u2019s structural engineering software<\/a>. The project had a very tight deadline and therefore the work was split in between 2 teams \u2013 the first one designed the connection between the original and the new bridge and the second team designed the rotation mechanism.\u00a0Changes from both teams were merged together using SCIA\u00a0Engineer\u2019s Table Input.<\/p>\n

Construction stages were defined by the fact that most structural elements in the model rotated (around the bridge longitudinal axis). Therefore,\u00a0multiple models for the most important stages\u00a0were created for the final assessment. To analyse the rotation-mechanism,\u00a0non-linear hinges, general plasticity and stability analysis were used.<\/p>\n