TsAGI Experts Complete Tests on Bridge Across the Moscow River
24 May 2017
Experts of the Central AeroHydrodynamic Institute named after professor N.E. Zhukovsky (TsAGI, part of the National Research Center “Institute named after professor N.E. Zhukovsky”) completed testing of the model of the cable-stayed bridge across the Karamyshevskoe straightening (the crossing between the Narodnogo Opolcheniya street and Nizhnie Mnevniki) for its aeroelastic stability in winds. The commissioning client is the OAO Giprostroymost Institute.
The project has a span of 300 meters and a pylon (main pillar) height of 137 meters making it the highest cable-stayed bridge in the Capital. The structure is designed to support a six-lane road. Also, an alternative model of a beam bridge is being studied. TsAGI experts have designed and prepared a dynamic model of the bridge at a scale of 1:80. In addition to 38 back-stays, the model of the structure also included railings and transport similar in mass to actual vehicles. The tests were conducted in TsAGI’s subsonic wind tunnel at a wind speed of up to 55 m/s.
Before the tests, experts from the Institute conducted mathematical calculations to consider the base bridge design and several alternatives for aerodynamic vibration damping methods, i.e. aerodynamic fairings and deflectors. Based on the results of the calculations, the most efficient forms of aerodynamic methods have been selected for further testing by TsAGI scientists in a test setup. The data obtained for high wind speed and low vibrational amplitudes suggests that the aerodynamic properties of the bridge structure are good.