Seismic Assessment of the Mustafa Inan Viaduct Case Study Seismic re-assessment study following earthquake damage Linear and nonlinear dynamic analysis using 3D thick beam elements Very good correlation achieved between previously measured and calculated modal frequencies In August 1999, the Kocaeli earthquake in Turkey damaged a number of structures on the Trans-European Motorway. In all, 20 viaducts, 5 tunnels, and a number of overpasses were a?ected. Damage varied from concrete spalling, shifting of girders from their seats, pier tilting, approach ?llsettlement, and for some structures total deck collapse. Gebze Institute of Technology, with the permission of and in cooperation with the Turkish general Directorate of Highways, have used LUSAS Bridge to study the e?ects of the earthquake

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