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  • 1.
    Bayoglu Flener, Esra
    KTH, Tidigare Institutioner, Byggvetenskap.
    Field Testing of a Long-span Arch Steel Culvert Railway Bridge over Skivarpsån: Part I2003Rapport (Refereegranskat)
  • 2.
    Bayoglu Flener, Esra
    KTH, Tidigare Institutioner, Byggkonstruktion.
    Field Testing of a Long-span Arch Steel Culvert Railway Bridge over Skivarpsån, Sweden: Part II2004Rapport (Refereegranskat)
  • 3.
    Bayoglu Flener, Esra
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap.
    Field Testing of a Long-span Arch Steel Culvert Railway Bridge over Skivarpsån, Sweden: Part III2005Rapport (Övrigt vetenskapligt)
  • 4.
    Bayoglu Flener, Esra
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad (byte av engelskt namn 20110630).
    Full-scale Testing of two Corrugated Steel Box Culverts with Different Crown Stiffness: Part I2006Rapport (Refereegranskat)
  • 5.
    Bayoglu Flener, Esra
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad (byte av engelskt namn 20110630).
    Full-scale Testing of two Corrugated Steel Box Culverts with Different Crown Stiffness, Part II2007Rapport (Refereegranskat)
  • 6.
    Bayoglu Flener, Esra
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Brobyggnad inkl stålbyggnad.
    Response of Long-Span Box Type Soil-Steel Composite Structures during Ultimate Loading Tests2009Ingår i: Journal of Bridge Engineering, ISSN 1084-0702, E-ISSN 1943-5592, Vol. 14, nr 6, s. 496-506Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Soil-steel composite structures are getting more popular in recent years. With the introduction of more sophisticated structures such as box culverts with flexural stiffeners, the review of largely experience based design models became inevitable. The paper presents the ultimate loading part of full-scale testing conducted on corrugated steel box culverts. Structures with two different spans of 14 and 8 m and different crown stiffness were investigated using different cover depths. The tests indicate that the response of the structure to the depth of the cover is not linear. The structures become more vulnerable to applied loads as the soil cover decreases. The increase in the load-bearing capacity with increasing soil covers is linear, which agrees with the theoretical models. The crown stiffening, however, is more effective under shallow soil covers. The load resistance of the structures is doubled at the crown level with the crown stiffening. The Swedish design method overestimates live load moments but underestimates live load thrusts. An adjustment to the calculation of the thrusts is proposed. The Canadian design method estimates the moments relatively well but it does not cover larger spans than 8 m.

  • 7.
    Bayoglu Flener, Esra
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Brobyggnad inkl stålbyggnad.
    Soil-Steel Interaction of Long-Span Box Culverts-Performance during Backfilling2010Ingår i: Journal of Geotechnical and Geoenvironmental Engineering, ISSN 1090-0241, E-ISSN 1943-5606, Vol. 136, nr 6, s. 823-832Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The paper presents the performance of four long-span deep-corrugated steel box culverts with spans of 8- and 14-m during backfilling, as well as comparisons with finite-element modeling and design codes. Two of the culverts were stiffened at the crown arch. The test results show that the stiffening applied on the culverts is quite effective. The crown rises of the respective stiffened culverts were found to be half those of the not-stiffened culverts. The influence of the structure geometry on the soil-passive earth pressure was confirmed, as well as the sensitivity of box culverts to soil loads with increasing spans. The results showed that the influence of the size and shape of the box culverts on the amount of thrusts must be better implemented in the design method. The finite-element analysis results were conservative when live loading was concerned but the crown displacements and thrust during backfilling were underestimated.

  • 8.
    Bayoglu Flener, Esra
    KTH, Tidigare Institutioner, Byggvetenskap.
    Soil-structure interaction for integral bridges and culverts2004Licentiatavhandling, monografi (Övrigt vetenskapligt)
  • 9.
    Bayoglu Flener, Esra
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Brobyggnad inkl stålbyggnad.
    Static and dynamic behaviour of soil-steel composite bridges obtained by field testing2009Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
  • 10.
    Bayoglu Flener, Esra
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad.
    Testing the Response of Box-Type Soil-Steel Structures under Static Service Loads2010Ingår i: Journal of Bridge Engineering, ISSN 1084-0702, E-ISSN 1943-5592, Vol. 15, nr 1, s. 90-97Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The paper presents the static loading of four long-span deep-corrugated steel box culverts with spans of 14 and 8 m. The tests, which were part of a series of full-scale tests, involved strain and displacement measurements carried out at different cover depths under the load of a truck. Two of the culverts were stiffened at the crown. The test results showed that the stiffening applied on the culverts is quite effective and that plain structure is more sensitive to cover depth compared to stiffened structure. The crown stiffening is more effective under shallow soil covers. The maximum displacement of plain structure is approximately twice the maximum displacement of the stiffened structure measured at 45-cm depth of cover. The Swedish and Canadian design methods are conservative when estimating live load moments but they underestimate live load thrusts. The measured maximum thrusts are up to four times larger than the calculated design values where the variation depends on the size of the culverts and the depth of soil. The culvert size has considerable influence on the thrusts and moments generated at the crown centerline, which could be implemented in the design models.

  • 11.
    Bayoglu Flener, Esra
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad (byte av engelskt namn 20110630).
    Karoumi, Raid
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad (byte av engelskt namn 20110630).
    Dynamic testing of a soil-steel composite railway bridge2009Ingår i: Engineering structures, ISSN 0141-0296, E-ISSN 1873-7323, Vol. 31, nr 12, s. 2803-2811Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Actual dynamic response of a long-span corrugated steel culvert railway bridge is studied. The bridge, which is a type of soil-steel composite structures, has a span of 11 m. Tests were carried out by measuring strains and displacements during passages of a locomotive at different speeds. Vertical ballast accelerations as well as the effects of braking forces were also measured. The tests showed that the speed has a large influence on the displacements, thrusts and moments. The measured dynamic displacements and thrusts are as much as 20% larger than the corresponding static response. This is greater than the values specified in bridge design codes. Dynamic amplification factors as high as 1.45 were obtained for the moments at the quarter point which is found to be much larger than the values for the crown point. This type of bridge structure is believed to be less sensitive to resonance from passing trains than other common bridge types, due to the high damping values obtained from the forced vibration tests.

  • 12.
    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 loads2010Ingår i: Proceedings of the Institution of Civil Engineers: Engineering Sustainability, ISSN 1478-4637, E-ISSN 1751-7664, Vol. 163, nr 1, s. 19-29Artikel i tidskrift (Refereegranskat)
    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.

  • 13.
    Bayoglu Flener, Esra
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Brobyggnad inkl stålbyggnad.
    Karoumi, Raid
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Brobyggnad inkl stålbyggnad.
    Testing the static and dynamic behaviour of a soilsteel bridgeManuskript (preprint) (Övrigt vetenskapligt)
  • 14.
    Bayoglu Flener, Esra
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Brobyggnad inkl stålbyggnad.
    Karoumi, Raid
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Brobyggnad inkl stålbyggnad.
    Sundquist, Håkan
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Brobyggnad inkl stålbyggnad.
    Field testing of a long-span arch steel culvert during backfilling and in service2005Ingår i: Structure and Infrastructure Engineering, ISSN 1573-2479, E-ISSN 1744-8980, Vol. 1, nr 3, s. 181-188Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The paper presents the first part of the in-situ measurements and data analyses for the tests conducted during backfilling and during service of a long-span corrugated steel culvert railway bridge over Skivarpsan, Rydsgard, Sweden. Static and dynamic tests were carried out measuring strains and displacements. Temperature readings were taken along with the measurements. Comparisons of moments during compaction showed that there is good agreement between test results and theoretical values. The theoretical calculation of the rise of the crown during compaction and the crown moments due to live load seem to be conservative, while the theoretical axial forces agree reasonably with the measured axial forces.

  • 15.
    Bayoglu Flener, Esra
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad.
    Sundquist, Håkan
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad.
    Field testing of a long-span arch corrugated-steel culvert under dynamic and static loads2007Ingår i: First European Conference on Burried Flexible Steel Structures, Rydzyna, Archives of Intitute of Civil Engineering, 2007, s. 25-33Konferensbidrag (Refereegranskat)
    Abstract [en]

    We present the dynamic and static performance of a long-span corrugated steel culvert railway bridge. The culvert has 7 mm plate thickness, and a 11.12 m span. Two sets of tests were carried out with a locomotive by measuring strains and displacements. The dynamic performance of the bridge under different speeds and braking forces were obtained. The loads do not have a visible effect on the crown before the locomotive passes the footing level. The moments at the crown are not affected as much as the moments at the quarter point. Thrusts are not influenced by the speeds as much as the moments. The values for the braking and dynamic tests are quite close to each other. The dynamic amplification factors based on the maximum vertical displacements of the crown increase significantly after 70 km/h (maximum is 1.24).

  • 16.
    Bayoglu Flener, Esra
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad.
    Sundquist, Håkan
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad.
    Full-scale Testing of Two Corrugated Steel Box Culverts with different crown stiffness2007Ingår i: First European Conference on Burried Flexible Steel Structures, Rydzyna, Archives of Intitute of Civil Engineering, 2007, s. 35-43Konferensbidrag (Refereegranskat)
  • 17.
    Karoumi, Raid
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad (byte av engelskt namn 20110630).
    Bayoglu Flener, Esra
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad (byte av engelskt namn 20110630).
    Sundquist, Håkan
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad (byte av engelskt namn 20110630).
    Dynamic testing of a soil-steel composite railway bridge2010Ingår i: Proc. 5th Int. conference on bridge maintenance, safety and management (IABMAS 2010), 2010, s. 2944-2948Konferensbidrag (Refereegranskat)
    Abstract [en]

    The 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. Strains, displacements and vertical ballast accelerations were measured during passages of a locomotive at different speeds. The results indicate that the speed of the locomotive has 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 the live load calculations according to design codes. However, dynamic amplification factors as high as 1.45 were obtained for the moments at the quarter point and this is found to be much greater than the values specified in bridge design codes. Despite this, due to the high damping involved, bridges of this kind are believed to be less sensitive to resonance problems from passing trains.

1 - 17 av 17
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