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  • 1.
    Bayoglu Flener, Esra
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad.
    Karoumi, Raid
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad.
    Testing a soil-steel bridge under static and dynamic loads2010Inngår i: Proceedings of the Institution of Civil Engineers: Engineering Sustainability, ISSN 1478-4637, E-ISSN 1751-7664, Vol. 163, nr 1, s. 19-29Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The static and dynamic response of a long-span arch soil–steel composite railway bridge is studied. The bridge has a span of 11 m and a rise of 4·3 m. Two field tests were carried out before and after the first winter. Strains and displacements were measured during passages of a locomotive at different speeds. Vertical ballast accelerations and the effects of braking forces were also measured. The measurements indicated that the speed of the vehicle had a large influence on the displacements, thrusts and moments. The structure was found to be safe when measured values of moments and thrusts were compared with live load calculations according to design codes. It is concluded that the dynamic amplification factors calculated from the tests were larger than the theoretical values according to bridge design codes. However, there are indicators of post-winter effects in the form of reduced dynamic amplification factors.

  • 2.
    Häggström, Jens
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och brand.
    Blanksvärd, Thomas
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och brand.
    Collin, Peter
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och brand.
    Tu, Yongming
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och brand. Southeast University, School of Civil Engineering, Nanjing.
    Full-scale testing to failure of a steel truss railway bridge2017Inngår i: Proceedings of the Institution of Civil Engineers: Engineering Sustainability, ISSN 1478-4637, E-ISSN 1751-7664, Vol. 170, nr 2, s. 93-101Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Significant resources have been invested in maintaining existing infrastructure. Many structures are becoming old, do not meet current requirements, or are reaching the end of their life cycle. It is not feasible or sustainable to replace all of those that may be deemed obsolete; however, often their specified capacities are very conservative. So there is an urgent need to obtain more robust knowledge of their true status. This paper describes a unique project, in which a 33 m long steel truss railway bridge (over the Åby River) was tested to failure. The findings can be used to identify optimal solutions for other bridges of the same design that are still in use, notably the bridge over Rautasjokk (a river in Sweden). These two bridges were tested in three stages. This paper focuses on the second stage, wherein Åby Bridge was subjected to static full-scale testing to failure, by pulling it downwards. The global failure mode consisted of buckling of the top chord with yielding of the steel starting at a total load of 8 MN and the peak load being reached at around 11 MN, corresponding to a load approximately four to five times higher than the characteristic design load.

  • 3.
    Song, Xingqiang
    et al.
    KTH, Skolan för industriell teknik och management (ITM), Industriell ekologi.
    Mulder, Karel
    Frostell, Björn
    KTH, Skolan för industriell teknik och management (ITM), Industriell ekologi.
    Ravesteijn, Wim
    Wennersten, Ronald
    KTH, Skolan för industriell teknik och management (ITM), Industriell ekologi.
    Transition in public participation in Chinese water management2011Inngår i: Proceedings of the Institution of Civil Engineers: Engineering Sustainability, ISSN 1478-4637, E-ISSN 1751-7664, Vol. 164, nr 1, s. 71-83Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In recent years, the Chinese central government has expressed the goal of working towards a civil society. However, there are great challenges in a transition to participatory decision-making in water systems management, and this paper aims to analyse the difficulties in the Chinese context. The development of Chinese water systems is summarised, with a focus on the characteristics of water management framework and its underlying values. The initiation of public participation in environmental decision-making is tracked, as well as its scope in the planning process of three water-related projects. Finally, the participatory mechanisms and capacity in China are briefly discussed from different perspectives. This paper argues that effective public participation in China is substantially hindered by current participatory mechanisms and capacity. Improved decision-making would result from: amendments to legal requirements on compulsory participation and broadening environmental information disclosure; developing sufficient relevant monitoring systems towards evidence-based planning and decision-making; inclusion of all relevant stakeholders under transparent planning and decision-making regimes; and building institutional capacity with the emphasis on developing a feasible procedural framework for participation and for assessing the effectiveness of the participatory process.

  • 4.
    Tholstrup, M.
    et al.
    MT Höjgaard a/s.
    Nielsen, J.P.
    MT Höjgaard a/s.
    Nilsson, M.
    Ramböll Sverige AB, Luleå.
    Hällmark, Robert
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och -produktion.
    Railway bridge over Södertälje Canal, Sweden2011Inngår i: Proceedings of the Institution of Civil Engineers: Engineering Sustainability, ISSN 1478-4637, E-ISSN 1751-7664, Vol. 164, nr 3, s. 123-132Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The new railway bridge project over Södertälje Canal comprises the replacement of the 80 year old bridge, which has reached the end of its useful life. The new bridge consists of a main lifting span section spanning 57 m over the canal and two 70 m approach spans, one on each side of the main bridge. In total, the bridge is 229.5 m long. The main lifting section is a steel truss bridge structure and is capable of opening when large ships pass under. Normal elevation free height is 26.7 m and the top elevation is approximately 40.5 m. The approach spans are composite bridges with a main steel box girder and an in situ cast concrete top plate

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