Sökning: "bridge structural member"

Visar resultat 6 - 9 av 9 avhandlingar innehållade orden bridge structural member.

  1. 6. Assessment of existing concrete bridges : bending stiffness as a performance indicator

    Författare :Markus Bergström; Paulo J. de S. Cruz; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : Optimizing the use of existing civil reinforced concrete (RC) structures could be interpreted in such a way as to say that the capacity should be used and taken care of in an effective manner, both from a technical and economical point of view, keeping the safety in mind. Achieving this requires thorough understanding of the structure and also of the tools used for assessing current and future capacity and needs. LÄS MER

  2. 7. Stresses in high performance concrete due to temperature and moisture variations at early ages

    Författare :Hans Hedlund; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : This thesis presents results from laboratory tests and numerical analyses of stress states in concrete structures arising from volume changes due to temperature and shrinkage during hydration. The laboratory tests presented here deal with: the determination of heat transfer coefficients for cooling pipes measurements of self-desiccation and shrinkage under sealed conditions deformation measurements under temperature and moisture changes and measurements of stress development during hardening for a fully restrained structural member. LÄS MER

  3. 8. Fatigue Life of Riveted Railway Bridges

    Författare :Björn Åkesson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; field tests; full-scale fatigue tests; steel bridges; fatigue life; railway bridges; riveted connections;

    Sammanfattning : This dissertation, which focuses on the fatigue life of riveted steel railway bridges, is based on: - A series of full-scale fatigue tests of nine riveted stringers taken from a railway bridge built in 1896. A review of and comparison with the different full-scale fatigue tests on riveted railway bridge members, which have been conducted in other laboratories over the years, is also given. LÄS MER

  4. 9. Fatigue in Riveted Railway Bridges - A study of the fatigue performance of riveted stringers and stringer-to-floor-beam connections

    Författare :Mohammad Al-Emrani; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This thesis is mainly concerned with two fatigue-related problems in riveted railway bridges. The fatigue life of riveted bridge girders is investigated using a series of fatigue tests performed on full-scale riveted stringers taken from an old riveted railway bridge. LÄS MER