Time-dependent analysis of segmentally constructed cantilever bridge comparing two different creep models

Segmentally constructed balanced cantilever bridges are often subjected to larger deflections then those predicted calculations, which could be a problem for the vehicular traffic especially in the case the deflections increase during the life-time of the bridge. It is the case of the "Navile" and "Sa Pruna" bridge, two similar viaducts located in Sardinia (Italy), both subjected to the same problems with large deformations involving considerable problems for vehicular traffic. In the present work a time analysis, related to "Navile" bridge, was performed as to compare the results obtained by two different creep-models the CEB-FIP Model Code 1990, the most common model and the B3 Model, which leads to different results from those obtained by the previous model. For the purposes of a comparison both two models have been introduced in the computation. The two different models lead to different results especially in the case of long time deformations, particularly the results obtained through the B3 model, are more in agreement with the real data. © 2012 Taylor & Francis Group.