Sökning: "post-tensioned concrete"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden post-tensioned concrete.

  1. 1. Analys av en spännarmerad balkbro : Inverkan på spännvidd och armeringsåtgång

    Kandidat-uppsats, KTH/Byggteknik och design

    Författare :Hampus Wennerkull; Robin Svensson; [2020]
    Nyckelord :Post-tensioning; span; half-through bridge; Brigade Standard; concrete girder bridge; railway; Spännarmering; spännvidd; trågbro; Brigade Standard; betongbalkbro; järnväg;

    Sammanfattning : Concrete girder bridges are a commonly used type of bridge which can be reinforced withboth regular and post-tensioned reinforcement. At a certain span length, the use of tensionreinforcement becomes a must because regular reinforcement won’t be enough. LÄS MER

  3. 2. Structural Health of a concrete tunnel lining under complex in situ loading

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :LEONARDO DALLA ROSA; [2019]
    Nyckelord :;

    Sammanfattning : Supporting structures were designed for a utility tunnel in hard rock which was to be intersectedby some road tunnels. With the intersections involving partial overlapping between the idealcross-sections, a concrete lining and post-tensioned steel cables were added to support theutility tunnel prior to the excavation of the road tunnels. LÄS MER

  4. 3. Analysis of post-tensioned concrete box-girder bridges : A comparison of Incremental launching and Movable scaffolding system

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Hamad El Hamad; Furkan Tanhan; [2018]
    Nyckelord :Movable scaffolding system; MSS; Incremental launching; post-tension; prestress; slen- derness; box-girder; Stockholm Bypass; Movable scaffolding system; MSS; Etappvis lansering; efterspänning; förspänning; slankhet; box-girder; Förbifart Stockholm;

    Sammanfattning : When designing a bridge it is of high importance that the geometry for the cross section is optimized for the structure. This is partly due to the influence of the amount of material needed and its impact on the budget and environment. LÄS MER

  5. 4. Post-tensioned stress ribbon systems in long-span roofs : Case study: Västerås Travel Center

    Master-uppsats, KTH/Betongbyggnad

    Författare :Samih Ahmed; Guayente Minchot; [2018]
    Nyckelord :cable suspended; stress ribbon; roof structure; post-tensioned concrete; SAP2000;

    Sammanfattning : The stress ribbon system has numerous advantages, that includes but are not limitedto: increasing overall stiffness, control deflections and reduction of materialsconsumption, which in turn, reduces the load and the cost. Nevertheless, its use isusually limited to bridges, in particular, pedestrian bridges; this can be attributedto the insufficient space that buildings’ usually have for end supports, or/and backstayedcables, that can accommodate the expected high pull-out forces occuring atthe cables’ ends. LÄS MER

  7. 5. Inverkan av placering av spännkablar pågenomstansningskapacitet hos armeradebetongplattor

    M1-uppsats, KTH/Byggteknik och design

    Författare :David Tran; Sebastian Correa; [2018]
    Nyckelord :ACI; critical shear crack theory CSCT ; Eurocode 2; Flat slabs; MC 2010; Post tensioned concrete; Prestress concrete; Punching shear; Slabs; Tendon; Tendon Placement; Tension; Two-way shear; Unbonded tendons; ACI; betonggenomstansning; betongplatta; dragspänning; efterspänd betong; Eurokod 2; Genomstansning; icke vidhäftande spännkablar; kabel; kabelplacering; MC 2010; platta; spännbetong;

    Sammanfattning : På grund av bostadsbristen de senaste åren har byggbranschen varit tvungen att möta den höga efterfrågan på bostäder. Ett sätt att underlätta det tryck som skapats på grund av den höga efterfrågan är att rekonstruera byggnader avsedda för annan användning än bostäder till bostadshus. LÄS MER