Sökning: "Arch dam"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Arch dam.

1. 1. Numerical study of the effect of thermal ice loads on concrete dams

   Master-uppsats, KTH/Betongbyggnad

   Författare :Imal Zuwak; Wasseem Kordoghly; [2020]
   Nyckelord :Arch dam; Buttress dam; Concrete; Finite element analysis; Ice load; Valvdamm; Lamelldamm; Betong; Finit elementanalys; Islast;

   Sammanfattning : It is essential to understand the mechanics of ice load and how it affects concrete dams located in a cold climate, such as Sweden, where the temperature becomes sufficiently cold to freeze the surface of the reservoir. The purpose of this thesis is to study ice load distribution along concrete dams, and its response during the application of an ice load. LÄS MER

3. 2. Behavior prediction of concrete dams

   Master-uppsats, KTH/Betongbyggnad

   Författare :Isak Nilsson; Leonard Sandström; [2020]
   Nyckelord :Concrete dams; dam monitoring; dam safety; measurement evaluation; databased models i;

   Sammanfattning : As many dams were built around 1950, the expected life span of these dams are about tobe reached. With this, the need for monitoring and increased understanding of the damsstructural integrity increases. In order to prevent failures, two warning signals are defined;alert and alarm. LÄS MER

4. 3. Thermal cracking of a concrete arch dam due to seasonal temperature variations

   Master-uppsats, KTH/Betongbyggnad

   Författare :Jonas Enzell; Markus Tollsten; [2017]
   Nyckelord :Arch dam; Concrete; Finite element analysis; Cracking; Progressive failure analysis; Valvdamm; Betong; Finit elementanalys; Sprickor; Progressiv brottanalys;

   Sammanfattning : Concrete dams located in northern regions are exposed to large seasonal temperature variations. These seasonal temperature variations have resulted in cracking in thin concrete dams. Continuous monitoring and evaluation of existing dams are important to increase the knowledge about massive concrete structures and to ensure dam safety. LÄS MER

5. 4. Computational fluid dynamics study of the spillway and plunge pool at Baihetan hydropower station : Numerical validation of the pressure distribution on the floor of an inverted-arch plunge pool

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :Anders Ramqvist; Martin Länsmans; [2017]
   Nyckelord :;

   Sammanfattning : Large-scale hydropower plants with high discharge flow and spillway heads cause high pressure on the downward plunge pool, resulting in erosion of the riverbed, which could ultimately lead to a dam failure. There is an interest of examining the pressure distribution on the plunge pool floor in order to locate where the pressure peaks most frequently occur. LÄS MER

7. 5. Finite element analysis of cracking of concrete arch dams due to seasonal temperature variation

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

   Författare :Fredrik Pettersson; Fredrik Hjalmarsson; [2017]
   Nyckelord :arch dam; hydro power; finite element method; abaqus; temperature variations; concrete; deformation; crack propagation; Technology and Engineering;

   Sammanfattning : Flera dammkonstruktioner i Norden utsätts för stora temperaturvariationer mellan sommar och vinter. I norra Sverige kan dammar vara utsatta för temperaturvariationer på upp emot 60–70 °C. Detta resulterar ofta i sprickbildning i betongen vilket medför utmaningar vid både utformning av nya dammar och underhåll av befintliga. LÄS MER