Sökning: "slenderness"

Visar resultat 1 - 5 av 17 avhandlingar innehållade ordet slenderness.

  1. 1. Structural Behavior of Reinforced High-Strength Concrete Columns

    Författare :Christina Claeson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sustained loading; columns; slenderness; finite element analyses; nonlinear fracture mechanics; high-strength concrete; short-term loading; eccentricity;

    Sammanfattning : The high compressive strength of high-strength concrete is especially advantageous in compressed members such as columns, which can be made more slender and, consequently, make economic benefits possible. However, the behavior of high-strength concrete columns is not yet fully understood. LÄS MER

  3. 2. Vippning av stålbalkar i hallramar

    Författare :Peter Collin; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Steel Structures; Stålbyggnad; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : The present thesis, written in Swedish, deals with the problem of lateral-torsional buckling, especially in gable frames. The aim of the work presented is to suggest an improved design method that takes into account the translational and rotational restraint produced by the roof and wall. A particular question is the behaviour of the comer region. LÄS MER

  4. 3. Mathematical Modeling of Transport Phenomena in Polymer Electrolyte and Direct Methanol Fuel Cells

    Författare :Erik Birgersson; KTH; []
    Nyckelord :Fuel Cell; DMFC; PEFC; model; visual cell; scale analysis; one-phase; two-phase;

    Sammanfattning : This thesis deals with modeling of two types of fuel cells:the polymer electrolyte fuel cell (PEFC) and the directmethanol fuel cell (DMFC), for which we address four majorissues: a) mass transport limitations; b) water management(PEFC); c) gas management (DMFC); d) thermal management. Four models have been derived and studied for the PEFC,focusing on the cathode. LÄS MER

  5. 4. Growth of genetically improved stands of Norway spruce, Scots pine and loblolly pine

    Författare :Samuel Egbäck; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Genetically improved material of Norway spruce (Picea abies (L.) Karst.), Scots pine (Pinus sylvestris L.) and loblolly pine (Pinus taeda L. LÄS MER

  7. 5. High strength steel : local buckling and residual stresses

    Författare :Mattias Clarin; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Steel Structures; Stålbyggnad;

    Sammanfattning : High strength steel provide designers with the possibility of creating more slender and weight efficient structures than would be possible if using steels with lower strength. To be able to do this, a structural designer needs updated and validated codes as aid in their work. LÄS MER