Sökning: "lateral bracing"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden lateral bracing.

  1. 1. I-girder Composite Bridges with Lateral Bracing : Improved load distribution

    Författare :Victor Vestman; Peter Collin; Robert Hällmark; Hans Petursson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; assessment; bridge; composite bridge; steel-concrete composite; I-girder; case study; horizontal trusses; lateral bracing; rehabilitation; strengthening; torsional stiffness; upgrading; Byggkonstruktion; Structural Engineering;

    Sammanfattning : This thesis deals with the subject of lateral bracing between the bottom flanges of I-girder composite bridges. The focus is on the impact of adding lateral bracing on existing bridges, as well as on new bridges. LÄS MER

  3. 2. Bracing of steel bridges during construction; theory, full-scale tests and simulations

    Författare :Hassan Mehri; Avdelningen för Konstruktionsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bracing; steel-concrete composite; steel; bridge; test; construction; laboratory; experiment; experimental; theory;

    Sammanfattning : A number of steel bridges have suffered lateral-torsional failure during their construction due to their lacking adequate lateral and/or rotational stiffness. In most cases, slight bracing can be of great benefit to the main girders involved through their controlling out-of-plane deformations and enabling the resistance that is needed to be achieved. LÄS MER

  4. 3. The normal and ACL deficient knee : an in vivo three dimensional kinematic and electromyographic analysis

    Författare :Dan K Ramsey; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Knee; Tibia; Femur; Tibiofemoral contact points; Tibiofemoral kinematics; Anterior cruciate ligament; ACL injury; Knee brace; Knee instability; Bone pin; Magnetic resonance imaging; NM; Neuromuscular adaptation; Electromyography.;

    Sammanfattning : The overall aim of this thesis was to describe the in-vivo 3D kinematics of the normal and ACL deficient knee. Baseline data from normal controls were compared against the pathological knee to assess whether generic functional knee braces reduced abnormal displacements. Moreover, 3D bony contact movements were derived from MRI data. LÄS MER

  5. 4. Idiopathic scoliosis : radiographic, neurophysiologic and psychologic aspects

    Författare :Yngvi Ólafsson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :idiopathic scoliosis; brace treatment; back surface analysis; self-image; somatosensory testing;

    Sammanfattning : The aim of this thesis was to study brace treatment outcome, the brace effect on electromyographic muscle responses and self image, possible occurrence of somatosensory dysfunction and the descriptive power of surface topography contra radiography, in idiopathic scoliosis. There were 64 patients in a retrospective 4. LÄS MER

  7. 5. Stabilising system for multi-storey beam and post timber buildings

    Författare :Gabriela Tlustochowicz; André J.M. Jorissen; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Träbyggnad; Timber Structures;

    Sammanfattning : For multi-storey timber buildings, the stabilisation against horizontal loads is one of the key issues, which becomes more severe with height. There are a few main concepts utilised to resist lateral forces; shear wall action, diagonal bracing, and frame action. LÄS MER