Department of STRUCTURAL ENGINEERING Faculty of engineering science and technology NORWEGIAN UNIVERSITY OF SCIENCE AND TECHNOLOGY Materialteknisk institutt November 2005

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 November 2005 Department of structural engineering

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 November 2005 Department of structural engineering

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 November 2005 Department of structural engineering

Research groups Structural mechanics (10 + 1) Steel and light metals – SIMLab (5 + 2) Concrete (6 + 4) Bio- and nanomechanics (2) November 2005 Department of structural engineering

our strength is their combination Our expertise is in Computational mechanics Experimental work FEM analysis in a well equipped heavy structures lab our strength is their combination November 2005 Department of structural engineering

Steel structures Stiffened panels in steel and aluminium Experimental studies on strength of stiffened panels, modellering and design rules (bridges, boats, offshore structures) High strength steels in structures Implications of use of high strength steels, with less ductility and possible material fracture Joints and connections Models for joint stiffness and capacity for structural analysis November 2005 Department of structural engineering

Impact and energy absorption SIMLab Structural IMpact Laboratory November 2005 Department of structural engineering

Selected SIMLab activities Crash-box Self pierce riveting Penetration Bumper system Material testing and modelling Castings November 2005 Department of structural engineering

Important test facilities 2060 7100 A B C D E  10 N   6080 Split Hopkinson Tension Bar Gas Gun Kicking machine November 2005 Department of structural engineering

Concrete structures Steel fibre reinforced concrete structures Material modelling and nonlinear finite element analyses Historical masonry structures 3D scanning of existing structures DIANA 8.1 November 2005 Department of structural engineering

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 November 2005 Department of structural engineering

Durability of concrete structures We want to avoid Determining the chloroid 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 chloroid content Reinforcement Depth November 2005 Department of structural engineering

Timber structures Modelling, analysis and testing; in both teaching and research Fatigue of timber bridges? NTNU results basis for new European rules November 2005 Department of structural engineering

Vibrations of a pedestrian bridge FEM modelling Full scale tests Pedestrian induced vibrations Examples: - Lardal (Vestfold) - Millenium (London) - Solferino (Paris) Laboratory tests November 2005 Department of structural engineering

Earthquake design Submerged tube bridge 1200 m long FEM modellering Acceleration series (m/s2) - earthquake (blue) - structural respons (read) av tunnel og vann November 2005 Department of structural engineering

Wind engineering Wind induced vibrations of bridges and towers 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 bridges and towers November 2005 Department of structural engineering

Resonance rig for full scale testing of pipelines Rotating weight Weight Tuning distance Resonance rig for full scale testing of pipelines Fullscale test of a 6” pipe November 2005 Department of structural engineering

Structural Integrity of Pipelines NFR funded STORFORSK project (2005-2008): Residual Stress Simulation for Integrity Assessment (RESIA) Microstructure modelling and Constitutive equations Residual Stress simulation Parameter Identification 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 November 2005 Department of structural engineering

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 November 2005 Department of structural engineering

Nano- and material mechanics The NTNU nanomechanical lab will be established in 2006 at our department Experimental November 2005 Department of structural engineering

Element free Galerkin method (EFG) Numerical method particularly well suited for simulation of fracture and 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 November 2005 Department of structural engineering

Development of computational tools CrossX FEMplate Bending, stretching and Cross section computations buckling of plates FrameIT Static and dynamic analysis of 3D frame type structures November 2005