Drag characteristics of a historical bridge pier

Bülbül, Mehmet Mert
The construction of river bridge requires placement of bridge piers within the river. These piers obstruct the flow and may cause an increase in water level on the upstream side of the bridge. This increase in water level has a negative impact on the stability of bridge and may be responsible for scouring action around the bridge pier. The shape of the bridge pier is an important factor. Since 20th century on, streamlined shapes for bridge piers are being used. It is also known that for the first time in history, Mimar Sinan has used streamlined shapes for bridge piers in 16th century. However, there is a historical bridge in Diyarbakır, called Ongözlü Bridge which was built in 1065, that has streamlined shaped piers on Tigris River. In the present work, the characteristics of the shape of piers of Ongözlü Bridge is studied numerically using Flow 3D computational fluid dynamics (CFD) sofware. Pier of Ongözlü Bridge is compared with the drag characteristics of the other shapes that have been used as piers in the literature. The results show that even at 11th century, the hydraulic works in Anatolia were ahead of its time, and the first bridge with a streamlined shape was built 3-4 centuries before Mimar Sinan. 
Citation Formats
M. M. Bülbül, “Drag characteristics of a historical bridge pier,” M.S. - Master of Science, Middle East Technical University, 2017.