Industrial and techno-economic feasibility of concrete structures reinforced with DP rebars

Structural and economical performance of reinforced concrete frames with Dual‐Phase and TempCore® steel rebars in uncorroded and corroded conditions

“…To account for the introduction of DP rebars in RC constructions, a modification of the values of %CR was introduced, considering the higher costs related to DP rebars' production. As already presented in Caprili et al, 18 the higher %CR for RC‐DP structures depends on the higher amount of DP rebars in RC structures (the lower design yielding strength as already presented in the design leads to higher reinforcement ratios) an on the higher production cost. This last one, according to the results of the industrial feasibility analysis 18 around the 5%—including both the modifications required by the industrial plant and the modification needed for production in terms of chemical components, and so forth.…”

“…Residual A gt in relation to achieved values of mass loss (ML) and simplified linear tendency (data provided in Caprili et al 18 )…”

“…It was following this idea that during the last years Dual‐Phase (DP) rebars were deeply investigated 15,16 : their typical microstructure, where martensite and ferrite coexist in the same matrix, highly reduces the sensitivity to corrosion phenomena providing, in the meanwhile, adequate strength and deformation capacity. In the framework of the European RFCS project NEWREBAR “New Dual‐Phase steel reinforcing bars for enhancing capacity and durability of anti‐seismic moment resisting frames” (2015–2019), new enhanced typologies of reinforcing bars with DP microstructure were developed, produced, characterized, and applied to constructions, highlighting the improvement given in terms of structural and economic convenience 17–22 . In the present work, the techno‐economic impact of adopting DP grades in RC constructions as alternative to traditional TempCore® is analyzed through the evaluation of the expected annual loss (EAL) index for a typical residential case‐study building, in reference, and corroded conditions.…”

“…In the framework of the European RFCS project NEWREBAR "New Dual-Phase steel reinforcing bars for enhancing capacity and durability of anti-seismic moment resisting frames" (2015-2019), new enhanced typologies of reinforcing bars with DP microstructure were developed, produced, characterized, and applied to constructions, highlighting the improvement given in terms of structural and economic convenience. [17][18][19][20][21][22] In the present work, the techno-economic impact of adopting DP grades in RC constructions as alternative to traditional TempCore ® is analyzed through the evaluation of the expected annual loss (EAL) index for a typical residential case-study building, in reference, and corroded conditions. The aim of the adopted procedure is, besides highlighting the "performance" benefit related to the higher durability of DP rebars, showing that costs connected to the introduction of a new product on the reinforcement market can be justified and sustained if kept below a reasonable threshold.…”

Seismic Design and Performance Assessment of Frame Buildings Reinforced by Dual-Phase Steel

“…The technology for producing DP reinforcing bars is one of the results of this project. In particular, two DP steel grades (i.e., DPD2 and DPF2) were developed and tested [19], and the industrial feasibility of DP rebars using existing plants was also evaluated [20]. It was shown that the existing plants have to be upgraded in order to allow for industrial production of the new steel.…”