Semi and Fully-probabilistic Nonlinear Analyses of Post-tensioned Concrete Bridge Made of KT-24 Girders
|
|
Bohumil Splichal,
David LehkĂ˝,
Jiri Dolezel
|
| Transactions of the VSB - Technical University of Ostrava, Civil Engineering Series |
|
2023, Volume 23, Issue 1, Pages 26-35
|
|
Doi: 10.35181/tces-2023-0005
|
|
This paper deals with the assessment of the design resistance of an existing railway bridge made of KT-24 precast post-tensioned concrete girders. The load-bearing capacity of the structure is determined using probabilistic nonlinear analysis by the finite element method. Load-bearing capacity is determined for the ultimate and serviceability limit states. A fully probabilistic approach is compared to selected recommended semi-probabilistic methods, which can greatly reduce the number of nonlinear calculations needed to estimate the design value of resistance. Two stochastic models are compared, reflecting the level of knowledge of actual material properties from the diagnostic survey. The results are compared and discussed with respect to accuracy and required computational time, which is a critical issue when performing a global nonlinear analysis of a complex structure.
|
|
Download full version of article
|
