Sökning: "Avdelningen för Konstruktionsteknik"

Visar resultat 31 - 35 av 36 avhandlingar innehållade orden Avdelningen för Konstruktionsteknik.

1. 31. Cracking in Reinforced Concrete Structures Due to Imposed Deformations

   Författare :Agnes Nagy; Avdelningen för Konstruktionsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; minimum reinforcement; cracking; softening; shrinkage; cooling; imposed deformations; conversion formula; static E-modulus; damping coefficient; resonance frequency; dynamic E-modulus; constitutive model; thermal stress; hydration process; reinforced concrete structure; early age; crack control; Building construction; Byggnadsteknik;

   Sammanfattning : This thesis is concerned with modeling of the cracking process in reinforced concrete due to imposed deformations. Cracking is investigated both at early ages, during hydration, and at mature age when the final properties of the concrete are reached. LÄS MER

3. 32. Risk Assessment of Climate Change Impacts to Built Infrastructure : Identification, Analysis, and Treatment of Climate Change Risks to Bridges

   Författare :Amro Nasr; Avdelningen för Konstruktionsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : .... LÄS MER

4. 33. Durability of timber members : Moisture conditions and service life assessment of bridge detailing

   Författare :Jonas Niklewski; Avdelningen för Konstruktionsteknik; []
   Nyckelord :wood; spruce; moisture; durability; decay; service life; detailing; model;

   Sammanfattning : The longevity of timber structures in exposed outdoor environments is often perceived to be unreliable as compared with that of concrete and steel structures. This situation is exacerbated to some extent by the fact that the European commission for standardization (CEN) currently provides no quantitative method for service life assessment of timber structures. LÄS MER

5. 34. A NEW APPROACH TO CRACK CONTROL FOR REINFORCED CONCRETE - An investigation of crack widhts close to the reinforcement and the correlation to service life

   Författare :Kristian Tammo; Avdelningen för Konstruktionsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; concrete cover; corrosion; Crack width; steel stress and service life;

   Sammanfattning : One of the most important factors governing durability of concrete structures is reinforcement corrosion, and to prevent degradation associated with it, it is desirable to use large concrete covers. However, if the concrete cover is increased, the majority of design methods will predict that the crack widths at the concrete surface increase significantly. LÄS MER

7. 35. Reliability-based Assessment of Concrete Dam Stability

   Författare :Marie Westberg; Avdelningen för Konstruktionsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; assessment; stability; concrete dam; structural reliability analysis; probability; uplift; system reliability;

   Sammanfattning : Risk management is increasingly used in dam safety and includes risk analysis, risk evaluation and risk reduction. Structural Reliability Analysis (SRA) is a probabilistic methodology that may be used in the risk assessment process. LÄS MER