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In this study connection between cable and pylon in a cable stayed bridge was experimentallyinvestigated A structural model of cable stayed bridge was manufactured where connection betweencable and pylon was pulley, sliding or hinged type. Pulley connection is a connection which is able torotate without any function between cable and pylon. To obtain longitudinal stifness and dynamiccharacteristics (such as fundamental natural frequency and damping ratio), static load test and freevibration test were carried out. Dynamic responses of bridge structure were obtained Font harmonicforced vibration test. Using a shaking table, excitation in the longitudinal direction was applied to thatmodel. Then longitudinal deflection at the top of pylon was measured Results of the model test shownthat the pylon with hinged connection Ls more rigid and its deflection could be minimal but has lowdamping ratio. While sliding type connection is more flexible but has high damping ratio. Damping ratiowas strongly influence by functions occurred in the bridge. |
