engleski

Bridge across Rijeka Dubrovačka

The design of the bridge across the Rijeka dubrovačka in Croatia is presented. The adopted bridge lay-out comprises the 87, 4 m span box type prestressed concrete approach viaduct with the 60 m cantilever and the 244 + 80, 7 m cable-stayed bridge with composite superstructure. The location of the bridge is in a highly active seismic zone and subject to very strong winds, which strongly influenced the design. The longitudinal layout of the cables is of modified fan type with partial suspension. Cable - stays in two inclined planes are spaced at 20 m. The main bridge superstructure is encastred into the east bank abutment, with 9 pairs of cable - stays anchored in this abutment. The approach viaduct is partially curved in plan. The superstructure depth varies from 3, 2 m at the west bank abutment and at the cantilever end to 8, 2 m at the fixed connection to the pier. Two hydraulic dampers of 2000 tons capacity are installed at the connection of the viaduct to the west bank abutment. The pier base is designed to act as plastic hinge in case of a major earthquake. The Bridge was opened for traffic in May 2002.

cable-stayed bridge; prestressed superstructure; bridge design

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