PSI - Issue 13

Vera Vujović / Procedia Structural Integrity 13 (2018) 489 – 495

490

2

Vera Vujovi ć / Structural Integrity Procedia 00 (2018) 000–000

chapters of the book Old Stone Bridges (containing information on earlier repairs on the Mehmed pasha Sokolovic Bridge) are: anatomy, pathology, protection, rehabilitation and conservation. The objective of the Case Study is to help identify the strategic guidelines for improving maintenance and monitoring of the bridge, including the application of new technologies. The case study defines a framework strategic approach to improving bridge maintenance management with a proposal to innovate the maintenance design and develop a real-time Structural Health Monitoring SHM system, develop model of Heritage Building Information Modeling HBIM, et all. Data taken from official sources: Ottoman archive; State Museum in Sarajevo; Official Gazette of BiH; Faculty of Civil Engineering, Belgrade, etc. 2. Bridge history Mehmed-pasha Sokolovic, after the foundation establishments, issued a charter an order to build a 12-ached stone bridge through the Drina river in the center of Visegrad, dedicated to the people and passengers. The design and supervision of the construction of the bridge was entrusted to Koca Mimar Sinan, the most famous architects of the Ottoman Empire. The bridge was built between 1571 and 1577 in a characteristic eastern style during the reign of Sultan Murat III. Mehmed-pasha Sokolovic (Bajica Bajo Nenadic, Sokollu Mehmet Paşa, 1505 or 1506-1579) was born in the village of Sokolovici near Visegrad, was the Great Vizier of the Ottoman Empire during the three sultans of 1565-1579. Koca Mimar Sinan (Josif Jermen, Tur.Koca Mi'mâr Sinyan Yagya 1489/1490 - Jul 17, 1588) was born in Cappadocia in Greece and was the chief architect (Turkish: mimar) and the construction engineer of the Ottoman Empire and participated in 300 projects (roads, bridges, schools, sacral buildings, aqueducts, etc.). 3. Technical description The static system are restrained arched supports, Fig. 1. The bridge is 228,64 m long: over the riverbed 179,44 m and the ramp 49,20 m. The width of the bridge is 7,25 m, while the height above the normal water level is 15,40 m. The bridge has a total of 15 (11 + 1 + 3) masonry arcs: 11 bridges the river; 1 below the ramp and 3 on the part of the ramp connection and the road. The 85 cm thick arches are classic ”broken” arches. Width of 9 river pillars is 3,50-4 m, and length is about 11,50 m. Parapet walls are 60 cm thick and 17,44 m in length. Above the arches of the entire length of the bridge, a stone-shaped cornice with a lime stone height of 30 cm is provided. On the front walls there are niches, palmette and rosette. Stone arches consist of arched element and two pillars. To fully understand the arc, we need to know its fracture mechanisms. Plastic joints are formed due to: direct load, deformation caused by slipping, horizontal displacement of the supports or temperature changes. Cracks that can arise on extrados and intrados are considered joints and do not represent the beginning of demolition of structures, but show that there have been unpredictable changes in the environment of the structure. Decaying one of the stone blocks can cause damage or demolition of the arches. Static designs form the plastic joint into the mechanism, and in statically unspecified constructions, the formation of a plastic joint will not endanger the load. The limestone stone of the tufa was used for building the bridge (part from the place Banja near Visegrad, and part from Bugojno). The foundations of the stone bridge in Visegrad have multilayer wood grills.

Fig. 1. View of the bridge of Mehmed-paša Sokolović in Visegrad

Table 1. Width of arches

Arch

L1

L2

L3

L4

L5

L6

L7

L8

L9

L10 11,2

L11

Width (m)

10,7

11,6

12,7

13,4

13,9

14,8

14,2

13,2

12,0

5,2