Sökning: "Bracing"

Visar resultat 1 - 5 av 14 avhandlingar innehållade ordet Bracing.

  1. 1. 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

  3. 2. 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

  4. 3. Slender roof structures : Bracing, modelling, full-scale testing and safety

    Författare :Anders Klasson; Avdelningen för Konstruktionsteknik; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  5. 4. 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

  7. 5. Adolescent Idiopathic Scoliosis : Postural Stability, Prognostic factors and Impact of Conservative Treatments on Radiologic, Clinical and Self-Reported Outcomes

    Författare :Marlene Dufvenberg; Allan Abbott; Birgitta Öberg; Paul Gerdhem; Hans Tropp; Josefine Naili; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Idiopathic Scoliosis; Postural stability; Spinal Appearance; Health-Related Quality of Life; Adherence; Physical Activity; Brace; Scoliosis-Specific Exercise; Prognosis; Survival Models;

    Sammanfattning : Background: Adolescent idiopathic scoliosis (AIS) is a three-dimensional distortion of spinal curvature of unknown cause that develops during puberty. If the frontal plane curvature exceeds a Cobb angle of 24°, full-time bracing is recommended to prevent curve progression, negative health consequences or need for surgery. LÄS MER