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    Monitored structural behavior of a long span cable-stayed bridge under environmental effects
    (2018) Bayraktar, Alemdar; Ashour, Ashraf; Karadeniz, Halil; Kurşun, Altok; Erdiş, Arif
    An accurate numerical analysis of the behavior of long-span cable-stayed bridges underenvironmental effects is a challenge because of complex, uncertain and varyingenvironmental meteorology. This study aims to investigate in-situ experimentalstructural behavior of long-span steel cable-stayed bridges under environmental effectssuch as air temperature and wind using the monitoring data. Nissibi cablestayedbridge with total length of 610m constructed in the city of Adıyaman, Turkey,in 2015 is chosen for this purpose. Structural behaviors of the main structural elementsincluding deck, towers (pylons) and cables of the selected long span cablestayedbridge under environmental effects such as air temperature and wind are investigatedby using daily monitoring data. The daily variations of cable forces, cableaccelerations, pylon accelerations and deck accelerations with air temperature andwind speed are compared using the hottest summer (July 31, 2015) and the coldestwinter (January 1, 2016) days data.
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    Öğe
    Structural performance of Nissibi cable-stayed bridge during the main and aftershocks of Adıyaman-Samsat earthquake on March 2, 2017
    (Springer International Publishing, 2019) Bayraktar, Alemdar; Ashour, Ashraf; Karadeniz, Halil; Kurşun, Altok; Erdiş, Arif
    The structural performances of long span cable-stayed bridges having different elements such as pylons, stayed cables and decks are very sensitive to earthquake ground motions due to their highly statically indeterminacy. Therefore, responses of pylon, cable and deck components of long span cable-stayed bridges should be continuously monitored to prevent structural damages. The present study aims to investigate the responses of pylons, stayed cables and deck components of Nissibi cable-stayed bridge during the main (M w = 5.5) and aftershocks (M w = 3.5-4.4) of Adıyaman-Samsat (Turkey) earthquake on March 2, 2017. Firstly, the properties of structural and fixed monitoring systems of Nissibi bridge are introduced, and active faults and earthquake zoning maps of Adıyaman, acceleration records and shake map of main and aftershocks of the earthquake are presented. Then, responses of the pylon, deck and cable elements during the main and aftershocks are obtained using the data taken from the fixed bridge monitoring system. The forces in cables and accelerations in the two pylons and deck are evaluated and compared with each other. © 2019, Springer Nature Switzerland AG.