VOLUME 3 - Reinforced and Prestressed Concrete Structures

This volume contains over 20 applications over reinforced and prestressed concrete structures and infrastructures, with several diagrams, structural schemes, and illustrative pictures of the several jobs; material data sheets of the one used in such applications, tests and research activities before and after the installation of such materials in order to verify the correct installation and structural performance of the members retrofitted.
Through the jobs illustrated it is presented the history of TEC.INN. S.r.l., with particular emphasis on passage from strengthening using steel plates to fiber reinforced polymer: the Italian Embassy in Mogadiscio (1984) where the stiffened reinforced concrete slabs have been strengthened using steel plates (Béton plaqué); the Giorgini bridge in Castiglion della Pescaia where, due to the particular site conditions, for durability reasons, stainless steel AISI 316 has been employed; are then described, among the many, all the strengthening applications using carbon fibers, starting from 1994, on an arch bridge of large span, located over the highway Flaminia, near the Somma pass. In this particular case, in addition to wrapping all the piers using carbon fibers for concrete confinement, also steel plates have been implemented for retrofitting the pier-slab joint, highly degraded and damaged in proximity of the connection with the arch below.
Since 1995, all the retrofitting-strengthening applications have been performed using advanced composite materials FRP, taking advantage of the different fiber types, varying the strength and elastic modulus. Prof. Antonio Nanni says about the volume: ”The volume starts with a description of the fundamental principles for designing reinforced concrete elements strengthened with externally bonded FRP systems, starting from examples using the Béton plaqué technique and then moving to the real core of the collection: strengthening and retrofitting reinforced and prestressed concrete structures using FRP. The reader will discover a summary of the Italian history on externally bonded FRP applications from the first application ever performed to the most recent ones”.