Analytical Modelling of the Historical Diyarbakir Karasu Bridge for its Ability to Carry Civil and Military Transport
Journal Title: Trends in Civil Engineering and its Architecture - Year 2018, Vol 1, Issue 4
Abstract
In this study, the Karasu Bridge dating back to the Roman period was examined to determine whether it was suitable to carry heavy commercial and military vehicles in special circumstances. An analytical model of this bridge was created using an ANSYS program based on finite elements. On the bridge model, linear and non-linear static analyses were performed first according to the heavy vehicle loads stated in AASHTO (American Association of State of Highway Transportation Officials) then in the second stage heavy military vehicles loads were simulated. As a result of the analysis, even though linear crushes were observed at the areas where the side walls of the bridge are fixed to the piers, it was seen that Karasu Bridge was capable of safely carrying the vehicle load as stated in AASHTO and military tanks in a safety way transport. Turkey has seen many different civilizations, and consequently, today, there are many historical buildings such as religious premises, viaducts and bridges. One of these important artifacts is the Karasu Bridge which crosses the Devegefidi river which is located 12km from Diyabakir -on the road to Ergani road (Figure 1). There is no specific information on the Karasu Bridge regarding the construction date however, taking the architectural features of the bridge into consideration, it is estimated that the bridge dates back to the Roman period. The bridge is mainly constructed in half circle arches and the remainder of the construction is based on a rectangular prism of the stones. Various researches have been carried on historical buildings. For example, Hagia Sophia, in Istanbul was analyzed by Ozkul and Kuribayashi [1] using a linear finite element model. The dynamic characteristics of the Hagia Sophia were obtained using the Wilson-0 method and also the ground motion data to understand its general structural behavior in the future earthquakes. Mele et al. [2] analyzed a basilica-type church in order to assess its structural behavior and seismic vulnerability. For this purpose, they used 3D static and dynamic linear analyses, and 2D nonlinear pushover analysis. The current structural state of the Basilica of Pilar, Zaragoza, Spain was investigated by Romera et al. [3]. The behavior of brick masonry, the main material used in the construction, was simulated first with linear elastic isotropic models and later with several non-linear isotropic models including brittle behavior in tension and plastic behavior in compression. Betti and Vignoli [4] applied the static and dynamic non-linear analysis to a basilica- type masonry church in order to assess its structural behaviour and its seismic vulnerability. Betti and Vignoli [5] also applied the static and dynamic nonlinear analysis to a Romanesque masonry church in order to assess its behavior and seismic vulnerability. The Qasr al-Bint historical monument in Jordan has been concerned by Bani-Hani and Barakat [6]. Dynamic finite element analyses were performed on both the existing monument in its current condition and for the proposed restoration. Experimental and numerical analysis of historical buildings were undertaken by Lourenfo [7].
Authors and Affiliations
Mustafa Kaya
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