Sökning: "sustained loading"

Visar resultat 1 - 5 av 18 avhandlingar innehållade orden sustained loading.

  1. 1. Anchorage in Concrete Structures Numerical and Experimental Evaluations of Load-Carrying Capacity of Cast-in-Place Headed Anchors and Post-Installed Adhesive Anchors

    Detta är en avhandling från Luleå : Luleå University of Technology

    Författare :Rasoul Nilforoush; Luleå tekniska universitet.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Headed anchor; Anchor bolt; Adhesive anchor; Concrete cone breakout; Concrete splitting; Pullout loading; Size effect; Member thickness; Anchor head size; Orthogonal surface reinforcement; Concrete Strength; High-strength concrete; Cracked concrete; Steel fiber-reinforced concrete; Sustained loading; Creep behavior; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : Various anchorage systems including both cast-in-place and post-installed anchors have been developed for fastening both non-structural and structural components to concrete structures. The need for increased flexibility in the design of new structures and strengthening of existing concrete structures has led to increased use of various metallic anchors in practice. LÄS MER

  2. 2. From Macromolecular Design to Supramolecular Self-assembly

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Lidija Glavas; KTH.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Self-assembly; micelles; core crystallinity; cyclic polypeptides; electroactivity; redox-responsiveness; triggered dissociation; loading; release; N-carboxyanhydride polymerization; polyesters; poly ε-decalactone ; Självorganisation; miceller; kärnkristallinitet; cykliska polypeptider; elektroaktivitet; tidsberoende dissociation; inkapsling; frisläppning; N-karboxyanhydrid polymerisation; polyestrar; poly ε-dekalakton ; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : Advancements in drug delivery have enabled a wider array of prevention, control and treatment of diseases such as cancer. Drug delivery systems have the possibility of encapsulating drugs with low solubility, delivering them to specific locations in the body as well as obtaining a controlled and sustained drug release. LÄS MER

  3. 3. Time-dependent crack growth and fracture in concrete

    Detta är en avhandling från Division of Building Materials, LTH, Lund University

    Författare :Fan Ping Zhou; [1992]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; creep; rupture test; sustained loading; deformationer; betong; brottmekanik; sprickor; sprickbildning; sprickmodeller; krypning; spänningar; brottenergi; brottspänningar; beräkningsmodeller; finita element; teori; laboratorieförsök; creep rupture; tidsberoende; fracture mechanics; Fictitius Crack Model; finite element method; visco-elastic fracture; time-dependent fracture; creep crack growth; concrete; tensile fracture; crack model;

    Sammanfattning : The objectives of this thesis are to study time-dependent fracture behaviour in concrete. The thesis consists of an experimental study, constitutive modelling and numerical analysis... LÄS MER

  4. 4. The evolution of upper Norrland's ports and loading places 1750-1976

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Ian G. Layton; Umeå universitet.; [1981]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; communications patterns; economic development; export trade; forest-based industries; historical geography; industrial location; northern sweden; port evolution; ports; transport technology;

    Sammanfattning : Models of port development have hitherto concentrated on landward communications and the organization of maritime space in their explanation of changes in port location and activity. This study demonstrates that the level of economic development in hinterlands together with industrial and marine technology are also significant factors and indeed play leading roles in the process of port evolution. LÄS MER

  5. 5. Long-term development, modeling and management of nutrient loading to inland and coastal waters

    Detta är en avhandling från Stockholm : Institutionen för naturgeografi och kvartärgeologi

    Författare :Amélie Darracq; Stockholms universitet.; Stockholms universitet.; [2007]
    Nyckelord :Physical Geography; geografi med naturgeografisk inriktning; Nutrients; catchments; environmental management; climate change; population and lifestyle development; subsurface-surface water interactions; long-term simulations; nutrient retention; modeling; hydrology; transport processes; biogeochemistry; scaling; transport and reaction rates; nutrients; climate chage;

    Sammanfattning : Environmental and water system protection and restoration require accurate knowledge and quantification of waterborne pollutant transport, retention-release and transformation processes taking place in the subsurface, river, lake and sea water systems, and at the interfaces between these systems. This thesis investigates the importance of spatial model resolution for such quantification and the possible long-term nutrient load development under different human perturbations and nutrient source management scenarios in the Swedish Norrström drainage basin, based on simulations with the GIS-based dynamic nutrient transport-attenuation model POLFLOW. LÄS MER