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KABLOLU KÖPRÜLERDE TRAFİK YÜKLERİNİN NEDEN OLDUĞU DİNAMİK ETKİLER

DYNAMIC EFFECTS INDUCED BY TRAFFIC LOADS ON CABLE-STAYED BRIDGES

Journal Name:

  • Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

Publication Year:

  • 2011

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
Vehicle-induced bridge vibrations has become an important issue for the dynamic response of bridges especially after the achievement of long spans by cable-stayed bridges during the last two decades. In this study, the effects of vehicle speed, which is one of the important parameters of vehicle-bridge interaction, and variations in the speed are investigated to determine the bridge responses. Tatara bridge which is the second largest cable-stayed bridge in the world, is considered by 3-D finite element model. Two sets of traffic load combinations are applied for three different vehicle speed values and analyses are conducted to evaluate the speed induced dynamic responses of the bridge. The largest responses in the bridge are generally observed for low speeds. On the other hand, larger responses begin to occur in the mid-span after the vehicles leave the mid-span of the bridge for higher speeds.
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Abstract (Original Language): 
Son yirmi yılda kablolu köprülerde büyük açıklıkların geçilmeye başlanmasıyla taşıt kaynaklı köprü titreşimleri, köprü dinamik davranışı açısından büyük önem kazanmıştır. Bu çalışmada taşıt-köprü etkileşiminde önemli parametrelerden biri olan taşıt hızının ve hızda meydana gelen değişimlerin köprü davranışı üzerindeki etkileri incelenmiştir. Dünyanın ikinci büyük kablolu köprüsü olan Tatara Köprüsü nümerik model olarak seçilmiş ve üç boyutlu olarak modellenmiştir. Üç farklı taşıt hızı için iki farklı trafik kombinasyonu oluşturulmuş ve köprünün hıza bağlı dinamik davranışı incelenmiştir. Yapılan incelemeler neticesinde en büyük tepki kuvvetlerinin genellikle düşük hızlarda meydana geldiği görülmüştür. Ancak, taşıtlar açıklık ortasından ayrıldıktan sonra açıklık ortasında en büyük tepki kuvvetleri yüksek hızlar altında meydana gelmeye başlamıştır.
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REFERENCES

References: 

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