SEISMIC PERFORMANCE AND RETROFIT OF A HISTORIC MONUMENT ARCH BRIDGE
Seismic performance of the oldest reinforced concrete arch bridge in Bosnia and Herzegovina is presented in this paper. The bridge was constructed in the late 1897 as the first reinforced concrete arch bridge during the AustroHungarian monarchy in Bosnia and Herzegovina. Several rehabilitation works were done however, no mayor interventions were ever done on this structure. Inadequate maintenance of the structure as well its inappropriate usage, passing of heavy vehicles (for which the bridge was not designed) and their long retaining on the bridge, as well as atmospheric influences have led to it degradation. The bridge was declared a national monument in 2009. In order to get as much as possible information about the bridge structure nondestructive and minor destructive tests were conducted in order to make an adequate numerical model. A rehabilitation of the structure was proposed following the ICOMOS guidelines and Venice Charter. As dynamic characteristics of bridge structures are the basis of structural dynamic response and seismic analysis, and are as well an important target of health condition monitoring, they were measured and calculated for the original structure and only calculated for the rehabilitated structure. Comparison of the results was done.