Nonlinear analysis of composite steel-concrete cable-stayed bridges at service and ultimate states
Event details
| Date | 20.03.2015 |
| Hour | 12:15 › 13:15 |
| Speaker | Prof. José Oliveira Pedro, IST Lisbon University, Portugal (invited Professor at IIC spring 2015) |
| Location | |
| Category | Conferences - Seminars |
The nonlinear analysis of composite steel-concrete cable-stayed bridges is presented. The FEModel used for the composite deck, including the flexible shear connection between the concrete slab and the steel girders, are first presented.
Geometrical and material nonlinear behaviours of both steel and concrete materials are briefly discussed, as well as, the cable's sag and time dependent effects due to load history, creep, shrinkage and aging of concrete.
These main sources of nonlinearity are evaluated for a 420 m main span composite cable-stayed bridge, under service conditions.
The failure load and the failure mechanism are also analysed, both at the end of construction and at long term.
The influence of the following factors is presented: (1) deck load pattern, (2) time dependent effects, (3) cables' yielding and “cable-out” effect, (4) existence of intermediate piers at the lateral spans, (5) effective slab width, and (6) flexibility of the shear connection.
Bio : Graduation 1991, MSc in 1995 and PhD in 2007 from IST Lisbon. PhD Thesis entitled: L’analyse du comportement des ponts haubanés avec de tablier mixte acier-béton.
Since 1991, junior then senior engineer at GRID design office, participated in the design of over 50 bridge projects, and also stadiums, towers, and other special structures. In parallel, since graduation teacher and researcher at DEC (civil engineering department) of IST Lisbon University. Promoted assistant professor in 2007, specialist of steel, steel-concrete bridges and special structures.
Geometrical and material nonlinear behaviours of both steel and concrete materials are briefly discussed, as well as, the cable's sag and time dependent effects due to load history, creep, shrinkage and aging of concrete.
These main sources of nonlinearity are evaluated for a 420 m main span composite cable-stayed bridge, under service conditions.
The failure load and the failure mechanism are also analysed, both at the end of construction and at long term.
The influence of the following factors is presented: (1) deck load pattern, (2) time dependent effects, (3) cables' yielding and “cable-out” effect, (4) existence of intermediate piers at the lateral spans, (5) effective slab width, and (6) flexibility of the shear connection.
Bio : Graduation 1991, MSc in 1995 and PhD in 2007 from IST Lisbon. PhD Thesis entitled: L’analyse du comportement des ponts haubanés avec de tablier mixte acier-béton.
Since 1991, junior then senior engineer at GRID design office, participated in the design of over 50 bridge projects, and also stadiums, towers, and other special structures. In parallel, since graduation teacher and researcher at DEC (civil engineering department) of IST Lisbon University. Promoted assistant professor in 2007, specialist of steel, steel-concrete bridges and special structures.
Practical information
- General public
- Free
Organizer
- Prof. Dr Nikolas Geroliminis & Katrin Beyer
Contact
- Prof. Dr Alain Nussbaumer