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    Wyświetlanie 1-4 z 4
    Tytuł:
    Recent research on flexible culverts in sloping terrain
    Autorzy:
    Wadi, A.
    Pettersson, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/383757.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    sloping terrain
    flexible culvert
    soil-steel composite bridge
    finite element method
    snowshed
    avalanche load
    Opis:
    The performance of buried flexible steel structures is directly influenced by the quality of the backfill soil and its configuration around the conduit. The economical choice of these structures stimulates practitioners to expand their different applications including their performance in sloping environment. The presence of steep surface slopes induces unbalanced loading and asymmetrical soil support around the conduit. This paper outlines the latest research efforts on how a flexible culvert would perform in sloping terrain environment. The paper focuses primarily on the structural behaviour of soil loading effects. The investigation highlights the use of numerical simulation in predicting the performance of a case study of flexible culvert under different construction schemes, where the influence of slope intensity and depth of soil cover are briefly presented. Soil slope stability as a major concern is also discussed. The research outcome clearly underlines the importance of soil configuration around steel culverts. The asymmetrical response of the conduit is predictably observed from the results and greatly influenced by the presence of shallow depth of soil covers. Sectional forces tend to increase with the increase of surface slopes. The results also underline the necessity of soil stability investigation when constructing flexible culverts in sloping terrain.
    Źródło:
    Archiwum Instytutu Inżynierii Lądowej; 2017, 23; 293-299
    1897-4007
    Pojawia się w:
    Archiwum Instytutu Inżynierii Lądowej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural design of flexible culverts development trends
    Autorzy:
    Pettersson, L.
    Wadi, A.
    Williams, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/383669.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    flexible culvert
    Soil-Steel Composite Bridge
    Canadian Highway Bridge Design Code
    TRVK Bro 11
    Swedish Design Method
    Opis:
    Structural design requirements for flexible culverts are available in several international bridge design codes. Examples are the Canadian (CHBDC), the American (AASHTO) and the Swedish (TRVK Bro ll2). The designation “flexible culvert” may today be somewhat misleading. The word culvert is usually associated with small pipes in road embankments. However, over the years flexible culverts have grown bigger and a more proper designation would be bridges. Therefore, these structures are often also referred to as Soil-Steel Composite Bridges or just Soil-Steel Bridges. With this development also new and more stringent requirements on the structural design follows. In this paper key aspects of a holistic design approach based on the authors experience on the essentials of flexible culvert structural design3 are outlined and is compared to the current design approaches in the CHBDC and the TRVK Bro 11. However, this paper will provide insight into how the holistic design topics are addressed in current design codes and future research and development.
    Źródło:
    Archiwum Instytutu Inżynierii Lądowej; 2017, 23; 237-250
    1897-4007
    Pojawia się w:
    Archiwum Instytutu Inżynierii Lądowej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Steel soil composite bridge: an alternative design solution for short-span bridge towards sustainability
    Autorzy:
    Du, G.
    Petersson, L.
    Karoumi, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/383565.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    concrete slab frame bridge
    soil steel composite bridge
    soil steel flexible culverts
    LCA
    C02 emission
    sustainable construction
    life cycle assessment (LCA)
    global warming
    climate change
    Opis:
    The construction sector is a major source of greenhouse gases. Under the increasing concern about climate change and growing construction activities, the whole sector is challenged to shift focus toward sustainable solutions. The traditional procurement often prioritizes technical and economic viability, while their environmental performance is overlooked. Today’s designers are urged to seek new design options to reduce environmental burdens. Sweden owns more than 24574 bridges, most of which are short spans. Among them, the slab frame bridge (CFB) is a common solution. Soil steel composite bridge (SSCB), alternatively, is a functional equivalent solution to CFB and shows advantages in low cost and easy construction. This paper compares the environmental performance between these two bridge types based on life cycle assessment (LCA). The analysis and its results show that the SSCB is preferable over CFB in most of the examined environmental indicators.
    Źródło:
    Archiwum Instytutu Inżynierii Lądowej; 2017, 23; 91-101
    1897-4007
    Pojawia się w:
    Archiwum Instytutu Inżynierii Lądowej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Large-span soil steel composite bridges
    Autorzy:
    Wadi, A.
    Pettersson, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/384031.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    flexible culvert
    soil-steel composite bridge
    Swedish design method
    long-span
    ultimate field test
    full-scale test
    loading to failure
    Opis:
    Soil-steel composite bridges are considered competitive structures being an economical alternative to similar span concrete bridges. They are increasingly used for road and railway bridge construction. Spans have increased and structures with spans over 20 m have been built. The continuous development of infrastructure impels designers to push the limits of these structures for bigger spans with the lowest possible height of cover. Since the birth of the ring compression theory, different design methods have been developed to account for the various conditions and facilitate the use of bigger span structures. Yet, there is an urge to investigate whether the current design procedures are conservative or if they are reasonably accurate to predict the capacity of large-span structures. This paper presents the on-going project involving the capacity of large-span soil-steel composite bridges. The study investigates the use of finite element modelling in predicting the performance of a case study for an ultimate limit state field test. The project also highlights the need and intention to perform an ultimate limit state test for a large-span structure. The outcome of the project is to assess the current design procedures and to reflect recommendations on the design where seen applicable.
    Źródło:
    Archiwum Instytutu Inżynierii Lądowej; 2017, 23; 287-292
    1897-4007
    Pojawia się w:
    Archiwum Instytutu Inżynierii Lądowej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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