Sökning: "Simply supported beam"

Visar resultat 1 - 5 av 18 uppsatser innehållade orden Simply supported beam.

  1. 1. Reliability-Based Sensitivity Analysis of the Dynamic Response of Railway Bridges

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Hasan Al-Zubaidi; [2022]
    Nyckelord :Railway bridges; High-speed trains; Simply supported beam; Global sensitivity analysis; Uncertainty quantification; Reliability; Ballast instability; Running safety; Passenger comfort;

    Sammanfattning : In response to the planned increase in operational speeds and axle loads of passengertrains that may lead to resonance-induced excessive vibrations in railway bridges,recent studies examined the reliability of bridges concerning train running safety andpassenger comfort limit states. In this respect, valuable information regarding theimportance of input variables can be obtained by conducting Sensitivity Analysis (SA). LÄS MER

  3. 2. Reduced stress method for steel in class 4 cross-sections : Evaluation of the reduced stress method for a railway bridge

    M1-uppsats, KTH/Byggteknik och design

    Författare :Therese Badrous; Ebba Lund; [2021]
    Nyckelord :FEM; Reduced stress method; Effective cross-section method; Local buckling; Steel cross-section; Class 4 cross-section; Railway bridge; FEM; Reducerad spänningsmetoden; Effektivt tvärsnittsmetoden; Lokal buckling; Ståltvärsnitt; Tvärsnittklass 4; Järnvägsbro;

    Sammanfattning : The effective cross-section method, also called reduced cross-section method is generally used for steel in class 4 cross-sections in considering local buckling. This method is a bit complicated and time consuming, which often leads to engineers not using profiles in class 4 cross-sections. LÄS MER

  4. 3. Modelling cross-laminated timber floors in dynamic analysis - Eigenfrequency prediction

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Institutionen för byggvetenskaper; Lunds universitet/Byggnadsmekanik

    Författare :Johannes Wetterholt; [2019]
    Nyckelord :finite element method; FEM; dynamic analysis; Eigenfrequency; CLT; cross-laminated timber; cross-laminated timber floors; wooden floors; Technology and Engineering;

    Sammanfattning : In the late 1990s cross-laminated timber (CLT) was developed. The development of CLT was a project aimed to produce a structural product that could compete with the concrete industry and contribute to a reduced effect on the environment, due to the low environmental impact of timber in relation to other building materials. LÄS MER

  5. 4. Vippning av stålfackverk : En studie av erforderlig stagning av över- och underram samtuppträdande moment i diagonaler

    M1-uppsats, KTH/Byggteknik och design

    Författare :Ellen Svensson; Nils Boman; [2017]
    Nyckelord :Initial bow imperfections; lateral torsional buckling; lateral and torsional restrain; Initialkrokighet; vippning; stagning; fackverk; FEM; Eurokod;

    Sammanfattning : Horisontella laster som uppstår från till exempel vindlast, snedställning och initialkrokighet kan ge upphov till vippning och måste därför hanteras. En vanlig metod som tillämpas för att hantera vippning är stagning, men för att kunna staga ett konstruktionselement är det viktigt att ha kännedom om hur elementet beter sig under vippning. LÄS MER

  7. 5. Patch loading resistance of welded I-beams : with respect to misaligned web stiffeners

    Master-uppsats, KTH/Stålbyggnad

    Författare :John-Alexander Boutzas; Dafina Zeka; [2016]
    Nyckelord :Patch loading; Stiffeners; I-beam; Plated steel structures; Abaqus; Simply supported beam;

    Sammanfattning : When a concentrated load is introduced perpendicular to the flanges of a steel beam, this condition is referred to as Patch loading (Gozzi, 2007). This occurrence is common in many steel structures, for example at supports or during launching of bridges. LÄS MER