Akademik Veri Yönetim Sistemi
11 th International Conference on Short and Medium Span Bridges , Ontario, Kanada, 19 Temmuz 2022, ss.1-10
Under the sponsorship of General Directorate of Highways of Turkey, a new specification is developed for the seismic isolation design of highway and railway bridges. This paper describes the distinct features of the newly developed seismic isolation bridge design specifications of Turkey in comparison to AASHTO Guide Specifications for Seismic Isolation Design of Bridges and EN15129: European Standard on Anti-Seismic Devices. The comparative study is performed for different sections of the design specifications including the parts related to; (i) the classification of bridges for analysis and design, (ii) seismicity and design response spectra, (iii) equivalent linear and time history analyses, (iv) types of seismic isolation and energy dissipation devices covered in design specifications, (v) design of seismic isolation and energy dissipation devices, and their minimum testing requirements and (vi) minimum requirements of seismic isolation and energy dissipation devices to ensure continued functionality and serviceability of the bridge. The comparative study revealed that the new Bridge Seismic Isolation Design Specifications of Turkey differs in many ways compared to AASHTO and EN15129 including the approaches related to the seismicity and design spectra with particular emphasis on near-field effects, minimum requirements for the serviceability of bridges, property modification factors used for seismic isolation and energy dissipation devices as well as testing procedures.