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<p>The paper provides a brief overview of recently developed fully coupled 3D chemo-hygro-thermo- mechanical model for simulation of chloride induced corrosion, before and after depassivation of steel as well as its consequences on degradation of reinforced concrete structures. The applications of the model are illustrated on three numerical examples. The aim of the first numerical example is to demonstrate the influence of cracks in concrete on transport processes and on depassivation time. In the second and the third numerical examples processes after depasivation of reinforcement are analyzed in order to study the influence of concrete quality, water saturation and cracks in concrete on corrosion current density of a macro cell; influence of rust transport into the concrete cracks and pores on damages in concrete as well as influence of corrosion on bond resistance. The numerical results are in good agreement with the available experimental observations, what leads to the conclusion that the model is able to realistically predict corrosion of reinforcement in concrete.</p>

<p>Serving to community, they are often exposed to public judgement, especially city bridges, which are continuously seen by many viewers on the bridge and from the different angles in urban setting. Therefore, it is necessary to design not only reliable, durable and economical bridges, but also aesthetically pleasant structures. To design the bridge as a new city landmark, which meets the requirements of large traffic volumes of vehicles and light urban railway as well as intensive but comfortable pedestrian transport, a new approach to bridge design is required.</p><p>Structural-architectural approach, illustrated by beautiful bridges, which harmoniously fit into the urban environment on decent (Trogir Bridge) or representative (new bridges in Zagreb) way, designed by Bridge Division at Faculty of Civil Engineering - University of Zagreb, will be shown in this paper. Respecting the known aesthetics values, for Bundek Bridge a unique structure is formed, which is already applied in the new airport terminal design, but it can be also transformed for other future landmark buildings, e.g. central metro station, as a modern style of the 21st century Croatian capital.</p>

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<p>The sustainable development of the Sava River banks area in Zagreb, as the most dominant natural and urban city motif, is planned to make the capital of Croatia a better place to live in. The improvement of this area, so far used only as a protection from floods, would be achieved by the complete river integration into the city and sufficient transport links between the city parts. Solving the problem of the inadequate capacity of the Sava River crossing in Zagreb, the public competitions have been organized for the preliminary bridge designs for the two new bridges located near the lakes, Jarun and Bundek. In this paper the two winning solutions are shown. When they will be built, the Jarun Bridge, asymmetrical cable-stayed bridge with one inclined pylon, and the Bundek Bridge, a continuous steel girder bridge comprising intersected arches forming frames, would be modern representatives of the worldwide-known Zagreb school of bridge engineering.</p>

<p>The paper provides an overview of maintenance activities on seven large reinforced concrete arch bridges in Croatia located on Adriatic coastline, built in two periods: in the 1960’s and 1970’s and at the last turn of the century. Inadequate attention to durability issues in combination with very aggressive maritime environment has led to expensive and technically demanding repair works on older arch bridges. The design of more recent constructed bridges took into account the experience from the in-service performance of older arch bridges. Moreover, structural health monitoring systems have been installed on those bridges. As chloride-induced corrosion is the major cause of deterioration of the Adriatic RC arch bridges, a numerical model, which can realistically simulate effects of reinforcement corrosion in concrete is developed and implemented into the finite element code to predict service life of new or already damaged structure.</p>