Solidian Reinforcements for the new Bosporus Bridge

Enormous 320 m bridge pillars, the world’s highest, are rising towards the sky at the Bosporus Bridge in Istanbul. During the construction of the pylons, curtain facades with reinforcements from the solidian GmbH, a specialist in textile concrete from Albstadt in Germany, were realized for the Turkish company Fibrobeton that used the elements to build the pillars.

From the first request to the opening of the bridge last August there remained only 9 months during which the solidian project team was required and challenged to prepare the first static calculation all up to the installation of the 3.200 m² facade panels. Just in time for the planned inauguration date in summer 2016, the third Bosporus Bridge, connecting Asia and Europe, was opened to traffic.

The supervision of large, innovative construction projects by the technical office of the solidian GmbH is part of the companies’ working philosophy as well as it is included in the range of services provided by the company since its beginning. This is very appreciated by customers, which are using Carbon – and AR Glass reinforcements. The big Turkish project, which shows several superlatives in architectural, as well as in constructional terms, proved to be predestined for the use of textile concrete. Without using the innovative material it would have been technically impossible to construct the façade design of the pylons.

In addition to the challenging construction of the combined suspension and cable-stayed bridge, regarding the height and weight, it was above all the fact of extremely high wind load of up to 300 kg / m² that made the building a challenge for statics and especially for the assembly team. The facade panels used to protect the building had to have a maximum weight of 110 kg/m, due to the substructure and the handling at high altitude that was required. This could not have been achieved by using conventional reinforced concrete. solidian’s engineers initially calculated the statics and developed the optimum geometry of the panels, which had a maximum dimension of 3.0 x 4.5 m and which were only 30 mm thin. The desired parameters were finally achieved with an optimal hybrid reinforcement made of glass and carbon mats.

The maximim weight of 110 kn/m2 was only to achieve with solidian GRID reinforcements

While solidian had started production immediately after the order had been placed in February 2015, practical product tests during the manufacturing process confirmed the pre-calculated planning and ensured safety in advance.

The realized corrosion-free product solution fulfills the required durability of 100 years and strongly confirms the potential of textile concrete as the material of the future.

About solidian
solidian is the leading supplier of textile reinforcements for concrete construction. Textile-reinforced concrete uses carbon, glass or basalt fibers instead of steel and, therefore, enables corrosion-free, light and durable constructions. The material allows building not only innovative architectures but also free-form surfaces. Run-down concrete structures can be renovated with textile-reinforced concrete thereby becoming durable. solidian is driving the technology forward and is producing its own reinforcement. Together with partners innovative concrete components and possible applications are realized. solidian.com

Author: Dr. Christian Kulas

Nina Rustler

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