Full Scale Measurement of Wind Pressure on a Deck of a Concrete Cable-Stayed Bridge

Part 1 Mean and Fluctuating Pressure Coefficient

Abstract

Though concrete cable-stayed bridges have been accepted to have an aerodynamic advantage, the recent remarkable development of concrete cable- stayed bridges requires wind tunnel tests to investigate the aerodynamic stability. However, there are few studies that compare the phenomenon observed by wind tunnel tests and by full scale measurements, especially wind pressure.
In this study, the wind pressure acting on a deck of a concrete cable-stayed bridge measured by full scale measurement and wind tunnel test is investigated . The bridge described here is IKARA Bridge that is the longest concrete cable-stayed bridge in Japan . First the angle of attack of an approaching wind at the bridge is compensated by a wind tunnel test . Then it was shown that the measured mean and fluctuating pressure are largely effected by the angle of attack and the turbulent intensity, respectively. Finally the flow pattern around the actual deck of the concrete cable stayed bridge was presumed.