Sökning: "lamelldamm"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet lamelldamm.

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. An alarm system for pore pressure measurements in the foundation ofconcrete dams : a case study of Storfinnforsen buttress dam

   Master-uppsats, KTH/Jord- och bergmekanik

   Författare :Daniel Falcão de Queiroz; [2018]
   Nyckelord :Buttress dams; dam foundation; pore pressure; alarm system; alarm limits; sliding in the rock mass; uplift pressure; piezometers.; Lamelldammar; dammgrundläggning; portryck; alarm system; alarmgränser; glidning i bergmassan; upptryck; portrycksmätare;

   Sammanfattning : Concrete buttress dams are relatively light structures and less demandingon foundations; because of that, they may have problems with upliftforces and horizontal joints in the area of the dam´s foundation maypresent a failure mode through sliding. The Storfinnforsen dam, thelargest concrete dam in Sweden, had its foundation studied recently andthe discovery of sub-horizontal joints in the bedrock led to the necessityof having the safety of the dam foundation to sliding assessed. LÄS MER

4. 3. Behavior of Swedish Concrete Buttress Dams at Sesmic Loading

   Master-uppsats, KTH/Betongbyggnad

   Författare :Erik Forsgren; Isak Berneheim; [2016]
   Nyckelord :seismic; Swedish earthquake; buttress dam; concrete; finite element analysis; seismik; jordbävning; lamelldamm; betong; finit element analys;

   Sammanfattning : The aim of the thesis is to study the response of Swedish buttress dams if they are subjected to an earthquake of relevant magnitude to Sweden. Swedish dams are evaluated for an extensive amount of load cases, but not for earthquake loading. Therefore, it is not known how the Swedish buttress dams would respond during such loading. LÄS MER

5. 4. Progressive failure analyses of concrete buttress dams : Influence of crack propagation on the structural dam safety

   Master-uppsats, KTH/Betongbyggnad

   Författare :Chaoran Fu; Bjartmar Hafliðason; [2015]
   Nyckelord :concrete buttress dams; cracked concrete; failure modes; safety factor; finite element analysis; nonlinear material properties; betong; lamelldammar; uppsprucken betong; brottmoder; säkerhetsfaktor; finita element analyser; icke-linjära material modeller;

   Sammanfattning : Concrete buttress dams are the most common type of concrete dams for hydropower production in Sweden. Cracks have been observed in some of the them. However, only limited research has been made concerning the influence of these cracks on the structural dam safety. LÄS MER

7. 5. Inverkan av alkalisilikareaktion (ASR) på lamelldammars bärförmåga

   Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Byggteknik

   Författare :Sara Norberg; Hadeel Sawasa; [2014]
   Nyckelord :;

   Sammanfattning : Dammar är en viktig konstruktion i Sverige och i världen bland annat för vattenförsörjning, reglering av flöden och elproduktion. En expansion på grund av en alkalisilikareaktion (ASR) i en betongdamm kan leda till många problem. Bland annat kan det uppstå läckage av vatten och problem med öppning och stängning av luckor. LÄS MER