Öz
Abstract - Masonry arch bridges are regarded as the oldest examples of engineered structures in the world and they reflect the
culture of previous civilizations with their various sizes, styles, and spans. These bridges were constructed centuries ago addressing
the load-carrying problems of old times. The preservation of these structures receives a great deal of attention in the structural
engineering community. In this respect, current study focuses on historical Dilovası Sultan Suleyman (Diliskelesi) Bridge in
Kocaeli, Turkey. In order to investigate the structural behavior of the current form of the bridge, Modal and Response Spectrum
analyses were carried out utilizing finite element methods.