Akademik Veri Yönetim Sistemi
International Conference on Engineering Technologies (ICENTE’22), Konya, Türkiye, 17 - 19 Kasım 2022, ss.363-368
This study examines the effect of different bent column heights on bridge fundamental period analytically to have an excellent insight into the behavior of isolated bridge structures with substructure flexibility. Also, the influences of integral or rigid and isolated support between bridge superstructure and substructure are investigated. Moreover, soil interaction is taken into account in the calculation of bridge substructure flexibility and the effect of various soil shear modulus are studied. As a result of these studies, it is observed that the flexibility of the bridge substructure causes the bridge fundamental period to increase up to a certain bent column height. Integrated or rigidly connected bridge bent columns reduce the bridge period, but after a certain column height, it reaches to the period of isolated bridges. Thus, it can be stated that the effectiveness of seismic isolators reduces beyond this particular column height. As far as various soil types are considered, it is recognized that the bridge period decreases with increasing shear modulus in relatively short column bridges while there is no significant change for bridges with longer bent columns. In other words, soft soils with small shear modulus have significant impacts on the periods of bridges with slightly tall columns, but none of the soil types has a remarkable effect for bridges with extremely tall column heights.