Department of STRUCTURAL ENGINEERING

1. Department ofSTRUCTURAL ENGINEERING Faculty of engineering science and technology NORWEGIAN UNIVERSITY OF SCIENCE AND TECHNOLOGY Materialteknisk institutt

2. Personnel & economy • 20 professors • 3 associate professors • 7 adjunct professors • 7 post. doc. & research fellows • 46 graduate students (“stipendiater”) • 5 + 2 administrative staff • 10 technical personnel (lab technicians) • University funding (2004): MNOK 25,5 • Total expenditures (2004): MNOK 50,9 Department of structural engineering

3. Education • BSc and MSc level (“siv.ing.”) – annually (2005)- 2 basic courses (8 parallels) – a total of 1000 students- 21 “siv.ing” courses – a total of 990 students- approx. 40 master degrees • PhD – annually- 8 courses – a total of approx. 30 students (2005)- 7 degrees per year (average for last 10 years) • Continuing education - annually- 1 EVU-course + participation in approx. 5 externally organized courses Department of structural engineering

4. Areas of research • Biomechanics • Computational mechanics and program development • Concrete technology • Design of- concrete structures- steel and light metal structures- timber structures • Fracture mechanics and fatigue • Impact and energy absorption • Nanomechanics and MEMS • Wind engineering Department of structural engineering

5. Research groups • Structural mechanics (10 + 1) • Steel and light metals – SIMLab (5 + 2) • Concrete (6 + 4) • Bio- and nanomechanics (2) Department of structural engineering

6. Computational mechanics Experimental work Our expertise is in FEManalysis in a well equipped heavy structures lab our strength is their combination Department of structural engineering

7. Stiffened panels in steel and aluminiumExperimental studies on strength of stiffened panels, modelleringand design rules (bridges, boats, offshore structures) Steel structures • High strength steels in structuresImplications of use of high strength steels, with less ductility and possible material fracture • Joints and connectionsModels for joint stiffness and capacity for structural analysis Department of structural engineering

8. Impact and energy absorption SIMLab StructuralIMpact Laboratory Department of structural engineering

9. Selected SIMLab activities Crash-box Penetration Self pierce riveting Bumper system Material testing and modelling Castings Department of structural engineering

10. N    10 A B C D E 6080 2060 7100 Important test facilities Split Hopkinson Tension Bar Gas Gun Kicking machine Department of structural engineering

11. Concrete structures • Steel fibre reinforced concrete structures • Material modelling and nonlinear finite elementanalyses • Historical masonry structures • 3D scanning of existing structures DIANA 8.1 Department of structural engineering

12. Fresh and hardening concrete • New part materials • Consistency/viscometry - measurements/ simulations • Self compacting concrete • Mix design • Rheology of fresh • concrete • The hardening phase • Material properties and • behaviour of structures • Heat development • Strength and stiffness vs time • Temperature- and shrinkage strains • Restraint and stress development • Evaluation of crack risk • Current project: Bjørvika Submerged tunnel Department of structural engineering

13. Durability ofconcrete structures We want to avoid Determining thechloroid content Chloroid profile A core sample from the structure is ground into thin layers Chloroid content Thin layers of concrete are analysed Cover thickness Critical chloroidcontent Reinforcement Depth Department of structural engineering

14. Timber structures Modelling, analysis and testing; in both teaching and research Fatigue oftimber bridges? NTNU results basis for new European rules Department of structural engineering

15. Vibrations of a pedestrian bridge FEM modelling Full scale tests Pedestrian induced vibrations Examples:- Lardal (Vestfold)- Millenium (London)- Solferino (Paris) Laboratory tests Department of structural engineering

16. Earthquake design Submerged tube bridge 1200 m long FEM modellering Acceleration series (m/s2) - earthquake (blue) - structural respons (read) av tunnel og vann Department of structural engineering

17. Wind engineering Gjemnessundet • Description of the wind field • turbulence in time and space • Wind tunnel • model investigations • Structural analysis • calculation of dynamic response • prediction of stability limits Wind induced vibrations of bridgesand towers Department of structural engineering

18. Pipelines Rotating weight Weight Tuning distance Resonance rig for full scale testing of pipelines Fullscale test of a 6” pipe Department of structural engineering

19. Structural Integrity of Pipelines • NFR funded STORFORSK project (2005-2008):Residual Stress Simulation for Integrity Assessment (RESIA) Residual Stress simulation Parameter Identification Microstructure modelling and Constitutive equations Integrity Assessment crack opening on tension side LINKpipe - finite element program for nonlinear analysis of thin shells which also accounts for inelastic fracture effects local buckling on compressive side Department of structural engineering

20. Biomechanics Computational biomechanics is an activity of increasing importance. Presently we address numerical analysis of: Heart and heart valves, bone and bone/prosthesis systems. Ultrasound image of left ventricle and the mitral valve Finite element analysis results of femur and hip prosthesis Department of structural engineering

21. Experimental Nano- and material mechanics • The NTNU nanomechanical lab will be established in 2006 at our department Department of structural engineering

22. Element free Galerkin method (EFG) • Numerical method particularly well suited for simulation of fractureand crack propagation in brittle materials • Simple to enhance accuracy in case of singularities in the stress field • Easy to couple with finite element method (FEM) in sub-regions Department of structural engineering

23. CrossX FEMplate Development of computational tools Bending, stretching and Cross section computations buckling of plates FrameIT Static and dynamic analysis of 3D frame type structures