Sökning: "internal crack geometry"

Hittade 3 uppsatser innehållade orden internal crack geometry.

  1. 1. Assessing the safety of cracked concrete dams

    Master-uppsats, KTH/Betongbyggnad

    Författare :Abdelsamad Mohamed Osman Fadul; [2021]
    Nyckelord :Buttress dams; Concrete; Global stability; Design criteria; RIDAS; Sliding; Overturning; Finite element analysis; Progressive failure analysis;

    Sammanfattning : AbstractThe overall safety of dams depend on several stipulations. One of them is global stability of the dam, which is addressed with approaches like that in (RIDAS, 2017) (the Swedish power companies’ guidelines for dam safety). When designing a new dam, two global failure modes; sliding and overturning should be considered according to RIDAS. LÄS MER

  3. 2. Bacteria - based self - healing mortar with bio - plastic healing agents : Comparative analysis on quantification and characterization of self-healing by various experimental techniques

    Master-uppsats, KTH/Betongbyggnad

    Författare :Rahul Roy; [2020]
    Nyckelord :Mortar; crack; autonomous healing; bacteria; bioplastic; lactic acid derivatives PLA ; alkanoate derivatives AKD ; internal crack geometry; quantification; characterization; statistical analysis; Bruk; sprickbildning; självläkning; bakteriebaserademedel; bioplast; mjölksyrederivat PLA ; alkanoatderivat AKD ; inre sprickbildning; kvantifiering; karakterisering; statistisk analys;

    Sammanfattning : Crack formation in concrete structures due to various load and non-load factors leading to degradation of service life is very common. Repair and maintenance operations are, therefore, necessary to prevent cracks propagating and reducing the service life of the structures. LÄS MER

  4. 3. Crack propagation in concrete dams driven by internal water pressure

    Master-uppsats, KTH/Betongbyggnad

    Författare :Maria Sohrabi; José Sanchez Loarte; [2017]
    Nyckelord :Concrete cracks; water pressure; concrete dams; crack propagation; finite element analysis; linear elastic fracture mechanics; instrumentation;

    Sammanfattning : Concrete structures are in general expected to be subjected to cracking during its service life. This is the reason why concrete is reinforced, where the reinforcement is only activated after cracks occur. However, cracks may be a concern in large concrete structures, such as dams, since it may result in reduced service life. LÄS MER