Sökning: "ultimate limit state"

Visar resultat 36 - 40 av 49 uppsatser innehållade orden ultimate limit state.

  1. 36. Shear cracks in reinforced concrete in serviceability limit state

    Master-uppsats, KTH/Betongbyggnad

    Författare :Alexander Chemlali; Rickard Norberg; [2015]
    Nyckelord :Shear cracks; Serviceability limit state; Modified compression field theory; Reinforced concrete panels; Non-linear FE analysis; Wing wall; Skjuvsprickor; Bruksgränstillstånd; Modifierad tryckfältsteori; Armerade betongpaneler; Icke linjär FE-analys; Vingmur;

    Sammanfattning : Shear cracks are formed when high oblique tensile stresses, e.g. in thin webs, exceed the tensile strength. A known example of this phenomenon is the extensive shear cracks that were found on the box-girder bridges Gröndal and Alvik, which were mainly caused by insufficient amount of shear reinforcement. LÄS MER

  3. 37. Evaluation of a Tramway’s Track Slab in Conventionally Reinforced Concrete or Steel Fibre Concrete

    Master-uppsats, KTH/Betongbyggnad

    Författare :Stavros Zioris; Alija Vranjkovina; [2015]
    Nyckelord :Steel fibre reinforced concrete SFRC ; conventional reinforcement; finite element;

    Sammanfattning : The dominant reinforcement used widely for concrete structures is conventional steel bars (rebars). Nevertheless, the perpetual effort toward evolution and development could not exclude the engineering field, thus new innovative and sophisticated methods are introduced. LÄS MER

  4. 38. Granskning av svensk standard för dimensionering av stålfiberbetongkonstruktioner : Jämförelse av plattor enligt SS 812310 och SS-EN 1992

    M1-uppsats, KTH/Byggteknik och design

    Författare :Daniella Sandberg; Carolina Wesley; [2014]
    Nyckelord :cracks; reinforcement; steel fibre concrete; SS 812310; Swedish standard; armering; sprickor; SS 812310; stålfiberbetong; svensk standard;

    Sammanfattning : En svensk standard, SS 812310­ – Dimensionering av fiberbetongkonstruktioner, har nyligen tagits fram som skall säkerhetsställa kvalitén och underlätta dimensioneringen av stålfiberbetongkonstruktioner. Tidigare har det inte funnits en dimensioneringsstandard som täcker in området stålfiberbetong. LÄS MER

  5. 39. Load Effect Modelling in Fatigue Design of Composite Bridges : An assessment of Fatigue Load Models 3, 4 and 5 according to SS-EN-1991-2 Actions on Structures – Part 2: Traffic loads on Bridges

    Master-uppsats, KTH/Stålbyggnad

    Författare :Mathias Dahlvik; Johan Eriksson; [2014]
    Nyckelord :Fatigue; Composite Bridges; Eurocode; BRO 2004; Fatigue Load Model; FLM; utmattning; kompositbroar; Eurokod; BRO 2004; utmattningslastmodell; FLM;

    Sammanfattning : At the turn of 2010/2011, Sweden went from designing structures according to nationaldesign codes to the new European standards Eurocode. For bridge engineers, this implieda change from a combination of BRO 2004 and BSK 07 to the Eurocode as the maindocuments, complemented by national documents such as TRVK Bro 11. LÄS MER

  7. 40. Nonlinear FEM load bearing capacity assessment of a concrete bridge subjected to support settlements : Case of a continious slab bridge with angled supports

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Daniel Hansson; [2013]
    Nyckelord :Nonlinear finite element method; concrete slab brigde; support settlements; load bearing capacity assessment; angled supports; Abaqus;

    Sammanfattning : A nonlinear finite element analysis was performed for an existing road bridge in order to see if that could show a higher load bearing capacity, as an alternative to repairing or replacing. The regular linear analysis had shown that the bridge could not take any traffic load due to the effects from large and uneven support settlements. LÄS MER