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FIGURE 13.35 Aeroelastic response of A-shape tower and inverted V-shape towerwith various locations of horizontal beam [31].

in-plane stiffness of the tower is not improved even after cable installation, being different from the out-of-plane rigidity, it is improved after the installation of the cable. Therefore, the in-plane vibration by the wind in bridge axis direction is still a severe problem even after completion for a cable-stayed bridge with an A-shape tower. Figure 13.35 shows the results of wind tunnel tests for the A- and the inverted V-shape

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