Blar i Institutt for konstruksjonsteknikk på utgivelsesdato
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Alkali Aggregate Reactions (AAR) in Norway: Thin section analysis and expansion measurements from a dam and a bridge
(Peer reviewed; Journal article, 1992)Two concrete structures with AAR have been investigated. The structures are a dam and a bridge, both approximately 30 years old. Both structures have a characteristic crack pattern on the surface of the concrete. Thin ... -
Some aspects of ski base sliding friction and ski base structure
(Dr. ingeniøravhandling, 0809-103X; 1999:137, Doctoral thesis, 1999)The present work highlights some aspects of ski base sliding friction and ski base structure. Ski base structure causes speed differences that range from negligible to almost 10% of the skier speed. The great speed difference ... -
Measurements and Simulations of Consolidation in First-Year Sea Ice Ridges, and some Aspects of Mechanical Behaviour
(Dr. ingeniøravhandling, 0809-103X; 2000:94, Doctoral thesis, 2000) -
Self-induced cracking problems in hardening concrete structures
(Dr. ingeniøravhandling, 0809-103X; 2000:121, Doctoral thesis, 2000)This thesis deals with prediction of early age cracking caused by restrained temperature dilation and autogenous deformation. Traditonally, prediction of early-age cracking has been based on temperature criteria. The ... -
Buckling and geometrical nonlinear beam-type analyses of timber structures
(Doktor ingeniøravhandling;2000:56, Doctoral thesis, 2000)An existing co-rotated formulation is presented, and a consistent nonlinear 3D beam element, based on 2nd order theory, and with internal geometric stiffness, is developed for implementation in the formulation. The element ... -
Kinematics in Regular and Irregular Waves based on a Lagrangian Formulation
(Doktor ingeniøravhandling;, Doctoral thesis, 2000)Kinematics in two-dimensional regular and irregular swface waves is described based on the Lagrangian form of the equations of motion, with particular emphasis 011 the conditions in the so-called splash zone in irregular ... -
Ballistic Penetration and Perforation of Steel Plates
(Dr. ingeniøravhandling, 0809-103X; 2000:124, Doctoral thesis, 2001)Situations involving impact, i.e. the collision between two or more solids, were at one time primarily of concern to the military. Nowadays, as safety is highlighted within most branches of industry, the field of impact ... -
Full- and Model Scale Study of Wind Effects on a medium-rise Building in a built up Area
(Dr. ingeniøravhandling, 0809-103X; 2002:95, Doctoral thesis, 2002)The present study deals with full- and model scale study of wind effects on a medium-rise building in a built up area. Most low-rise building experiments have been based on an isolated building placed in a relatively ... -
Crashworthiness of aluminum extrusions subjected to oblique loading: experiments and numerical analyses
(Journal article; Peer reviewed, 2002)Oblique loading was studied through quasi-static experiments and numerical simulations. The behavior of square aluminum columns in alloy AA6060 subjected to quasi-static oblique loading was investigated experimentally for ... -
Crash behavior of obliquely loaded aluminum extrusions
(Chapter, 2002)The energy absorbing capability of obliquely loaded aluminum extrusions was studied through quasi-static experiments. Square aluminum columns in alloy AA6060 were clamped at one end and oblique load conditions were realized ... -
Rheology of Particle Suspensions: Fresh Concrete, Mortar and Cement Paste with Various Types of Lignosulfonates
(Dr. ingeniøravhandling, 0809-103X; 2003:18, Doctoral thesis, 2003)The major issue concerns how the different lignosulfonate types changes the rheological properties of the cement based material (concrete, mortar and cement paste) as a function of temperature and time. In such terms, it ... -
Empty and foam-filled circular aluminium tubes subjected to axial and oblique quasi-static loading
(Journal article; Peer reviewed, 2003)Tests on tubular columns made of the aluminium alloy 6060-T4 under axial and oblique, quasi-static loading have been performed. The columns were fixed at one extremity, while a concentrated force was applied at the other ... -
Constitutive modeling of aluminum foam including fracture and statistical variation of density
(Journal article; Peer reviewed, 2003)An existing constitutive model applicable for aluminum foam was evaluated. The model was implemented in LS-DYNA, and several test cases were analyzed and compared to experimental data. The numerical analyses consisted of ... -
Square aluminum tubes subjected to oblique loading
(Journal article; Peer reviewed, 2003)The behavior and energy-absorbing capability of obliquely loaded square thin-walled aluminum columns in alloy AA6060 were studied through quasi-static experiments and FEM-analyses with LS-DYNA. The specimens were clamped ... -
Behaviour and Strength Prediction of reinforced Concrete Structures with Discontinuity Regions
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:11, Doctoral thesis, 2004)This report presents an analytical study on reinforced concrete members with disturbed stress and strain states which are mainly caused by geometrical irregularities and loading conditions. Finite element methods are used ... -
Alkali-reactive and inert Fillers in Concrete. Rheology of fresh Mixtures and expansive Reactions
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:92, Doctoral thesis, 2004)Due to the rather limited obtainable resources of natural aggregates suitable for concrete purposes, the technology of crushed aggregates becomes more important. The production of crushed aggregates generates large amounts ... -
On the shear capacity of steel plate girders with large web openings
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:9, Doctoral thesis, 2004)This report presents an investigation of the shear capacities of steel plate girders with web holes, penetrations, cut-outs or openings. The study is motivated by the need for simple guidelines that can be used in practical ... -
High-strength Steel Plates subjected to Projectile Impact: An experimental and numerical Study
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:38, Doctoral thesis, 2004)The present thesis involves research on the ballistic penetration and perforation of steel plates, where the overall goal is to increase the physical understanding of the different phenomena taking place during this type ... -
Modeling of material failure in foam-based components
(Journal article; Peer reviewed, 2004)The modeling of material failure in foam-filled beams was explored through numerical analyses with LS-DYNA. The study was based on previous physical tests on bending of square aluminum extrusions filled with aluminum foam. ... -
Aluminum foam-filled extrusions subjected to oblique loading: experimental and numerical study
(Journal article; Peer reviewed, 2004)The behavior of empty and foam-filled square thin-walled aluminum columns in alloy AA6060 subjected to quasi-static oblique loading was examined. Previous studies have shown that by introducing a load angle, the energy ...