Sökning: "Prestressed Concrete Bridges"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden Prestressed Concrete Bridges.

  1. 1. Mapping of Dependent Structural Responses on a Prestressed Concrete Bridge using Machine Learning Regression Analysis and Historical Data : A Comparison of Different Non-linear Regression Approaches

    L1-uppsats, Umeå universitet/Institutionen för datavetenskap

    Författare :Vedad Coric; [2023]
    Nyckelord :Prestressed Concrete Bridges; Structural health Monitoring; Machine Learning; Regression analysis; Infrastructure management;

    Sammanfattning : Prestressed concrete bridges are susceptible to deterioration over time which might significantly affect their capacity and overall performance. In previous decades, infrastructure owners have found that continuous monitoring of these assets is a valuable tool for their management as it facilitates the decision-making process regarding the intervention strategies required. LÄS MER

  3. 2. Study of demolition processes for prestressed concrete bridges: Kalix bridge

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Lundin Hanna; [2022]
    Nyckelord :Kalix bridge; demolition methods; demolition process; FEM analysis; Kalixbron; rivningsmetoder; rivningsprocesser; FEM analys;

    Sammanfattning : Bridges in Sweden are getting older and some of them are reaching their designed life span. With an older generation of bridges, the need for a good understanding of demolition processes increase. The Kalix bridge is planned to be demolished and will be used as a case study in this thesis. LÄS MER

  4. 3. Modelling Time-Dependent Effects for Segmentally Constructed Prestressed Concrete Bridges

    Master-uppsats, Lunds universitet/Avdelningen för Konstruktionsteknik; Lunds universitet/Institutionen för bygg- och miljöteknologi

    Författare :Niclas Elfving; Joel Sunesson; [2021]
    Nyckelord :Concrete; Creep; Segmentally constructed; Prestressing; Post-tensioning; Viscoelastic; Eurocode; Finite Element; Shell elements; Beam elements; Time-dependant; Steel relaxation.; Technology and Engineering;

    Sammanfattning : Tidsberoende effekter, såsom krypning, krympning och stålrelaxation, är ofta svåra att prediktera när det kommer till förspända betongkonstruktioner. Krypning som ett fenomen är komplicerat och förenklas därför i gällande byggnormer (Eurocode), för att underlätta konstruktörens arbete. LÄS MER

  5. 4. Monitoring and Modelling of the Abiskojåkka Bridge

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Byggkonstruktion och brand

    Författare :Kasper Furenstam; [2020]
    Nyckelord :Prestressed bridge; Abisko; Monitoring; thermal effects; FEM;

    Sammanfattning : The infrastructure of today is getting older and problems caused by deterioration over time is affecting the service life of these structures. In Sweden most of the existing bridges were constructed 60 to 70 years ago, rising the need to determine the state of health of the bridges as the maintenance costs will increase heavily. LÄS MER

  7. 5. Widening of The Nockeby Bridge : Methods for strengthening the torsional resistance

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Jenny Andersson; [2016]
    Nyckelord :Strengthening of bridges; external prestressed reinforcement; carbon-fiber reinforced polymer; torsion; torsional resistance; prestressed concrete; Förstärkning av broar; extern spännarmering; kolfiberförstärkning; vridning; vridkapacitet; förspänd betong;

    Sammanfattning : i Abstract The Nockeby Bridge, in the western part of Stockholm, is a prestressed concrete bridge with an openable swing span of steel. The bridge was built during 1970 and should now be widened with 0.5 meters on each side. The concrete bridge deck is supported by two main-beams and cross-beams are located at the position of all supports. LÄS MER