Finite element analysis of concrete structures: y Overview of
Concrete Structures Finite element analysis of concrete structures: y Overview of research at Chalmers Karin Lundgren Concrete Structures Research methodology Research methodology Strategic combination of theoretical analyses and experiments to understand the structural behaviour of structures to understand the structural behaviour of structures Hypothesis ‐ Conceptual model Theoretical modelling ‐Analytical ‐Numerical Experiments Engineering knowledge Understanding of the structural behaviour Safer and more efficient methods for analysis and design Safer and more efficient methods for analysis and design Concrete Structures Finite element analysis of concrete structures Finite element analysis of concrete structures Started at Chalmers late 80:s, Kent Gylltoft Adjunct Professor Research areas • Fundamental theoretical work like material modelling – Magnus Åkesson, Peter Grassl, Per‐Ola Svahn, Rasmus Rempling • Columns – Christina Claeson Jonsson, Mathias Flansbjer • Modelling of whole bridges – Mario Plos, Helén Broo, Hendrik Schlune • Bond and anchorage d d h – Magnus Åkesson, Karin Lundgren, Jonas Magnusson • Deteriorated structures – Karin Lundgren, Kamyab Zandi Hanjari, Filip Nilenius, Mohammad Tahershamsi Karin Lundgren, Kamyab Zandi Hanjari, Filip Nilenius, Mohammad Tahershamsi • Prefabricated concrete components and structures – Rikard Bolmsvik, Peter Harryson, Ingemar Löfgren, Helén Broo • Fibre‐reinforced concrete – Ingemar Löfgren, Anette Jansson, David Fall • Impact loading – Morgan Johansson, Joosef Leppänen, Ulrika Nyström • Safety methods Safety methods – Hendrik Schlune Concrete Structures Fundamental theoretical work like material modelling d l h i l k lik i l d lli Magnus Åkesson, Peter Grassl, Per‐Ola Svahn, Rasmus Rempling • EEnhanced strain approach h d i h • X‐FEM, dynamic response • Nonlocal models, Nonlocal models localization in compression Cyclic loading • Cyclic loading • Impact loading Concrete Structures Columns l Christina Claeson Jonsson, Mathias Flansbjer • High strength concrete columns Hi h h l • Steel‐encased concrete columns Concrete Structures Modelling of whole bridges d lli f h l b id Mario Plos, Helén Broo, Hendrik Schlune • Sh Shear, including full‐scale test i l di f ll l • Shear and torsion • Model updating using Model updating using field measurements P U Concrete Structures Bond and anchorage d d h Magnus Åkesson, Karin Lundgren, Jonas Magnusson • FFrictional model for bond i i l d lf b d • Analyses of pull‐out tests, end anchorage splices end anchorage, splices… Normal stress Reinforcing bar Reinforcing bar μ un Bond stress ut tn tt Concrete Structures Deteriorated structures i d Karin Lundgren, Kamyab Zandi Hanjari, Filip Nilenius, Mohammad Tahershamsi • C Corrosion, modelling of swelling i d lli f lli effects • Multiscale modelling of coupled Multiscale modelling of coupled chloride‐moisture diffusion • Frost Concrete Structures Prefabricated concrete components and structures f bi d d Rikard Bolmsvik, Peter Harryson, Ingemar Löfgren, Helén Broo • • • • Railway sleepers R il l Joints Lattice girder elements Lattice girder elements Hollow core units T [kNm] EN 1168 V [kN] Concrete Structures Fibre‐reinforced concrete ib i f d Ingemar Löfgren, Anette Jansson, David Fall • • • • Wedge split tests and inverse analysis Structural analysis Structural analysis Crack control Uniquely shaped structures Uniquely shaped structures Concrete Structures Impact loading l di Morgan Johansson, Joosef Leppänen, Ulrika Nyström • Ci Civil defence shelters il d f h l • Fragment impact • Projectile impact on plain and Projectile impact on plain and reinforced concrete Concrete Structures Safety methods f h d Hendrik Schlune • Partial safety factors not suitable P i l f f i bl • Full probabilistic methods demanding • New safety format New safety format 450 Axle load load [kN] 400 350 300 250 200 150 100 50 Displacement [mm] 0 0 10 20 30 40 50 60 70 80 90 Subscale 1 Subscale 2 Subscale 3 Structure Concrete Structures Some challenges and possibilities for future • New materials N i l – Textile reinforcement – Fibres • Existing structures, deteriorated structures – Natural corrosion – Time effects – Combined effects of frost, corrosion and cyclic loading • Computational design Computational design – Optimization of structures • Multiscale modelling of reinforced concrete g
© Copyright 2024