Akademik Veri Yönetim Sistemi
4th International Eurasian Conference on Science, Engineering and Technology (EurasianSciEnTech 2022), Ankara, Türkiye, 14 - 16 Aralık 2022, ss.796-803
In this study, the variation of earthquake design displacements of lead-rubber isolators applied to unbalanced
bridges with different pier column heights for different earthquake design parameters, pier column height,
isolator diameter, lead core diameter and rubber thickness is numerically investigated. Long and short spectral
acceleration coefficients and local soil class are considered as earthquake design parameters. Since this study
requires a large number of structural analysis of isolated bridges, a code is developed to conduct these analyses
automatically with the help of application programming interface feature of the bridge structural analysis
program. The code provides data exchange between these two programs to model isolated bridge structure
parametrically. As a result of numerous structural analyses, it can be concluded that all considered short period
spectral acceleration coefficients significantly increase the isolator design displacement, but long period
spectral acceleration coefficient is influential when it takes small values in the case of large short period
acceleration coefficients. When the local soil classes are examined, it is seen that larger design displacement
is obtained in weak soils and the effect of the soil increases with increasing short period spectral acceleration
coefficient. Additionally, the design displacements of the isolators on the pier whose column height varies
become almost zero as the height increases up to a certain value. As far as isolator geometrical properties are
considered, it is observed that when the isolator diameter and lead core diameter are increased the design
displacements decrease. On the contrary, as the isolator rubber thickness increases the design displacement
increases.