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Prof. Dr. Stefania Imperatore
Department of Civil Engineering, Niccolò Cusano University, Rome, Italy

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Research Keywords & Expertise

0 Corrosion
0 Reinforced Concrete
0 existing structures
0 Durability
0 Structural assessment

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Corrosion
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existing structures

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Review
Published: 07 March 2021 in Metals
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Infrastructures and industrial buildings are commonly exposed to aggressive environments and damaged by corrosion. In prestressed reinforced concrete structures, the potential risks of corrosion could be severe since reinforcements are already subjected to high amounts of stress and, consequently, their load-bearing capacity could abruptly decrease. In recent years, some experimental studies have been conducted to explore the flexural behavior of corroded pretensioned reinforced concrete (PRC) beams, investigating several aspects of residual structural performance. Although many studies have been done in this area, there is no concise paper reviewing the state-of-the-art research. Accordingly, the main objective of this paper is to provide a review of the available experimental tests for residual capacity assessment of corroded PRC beams. Based on the state-of-the-art review, a degradation law for the flexural strength of corroded PRC beams is suggested.

ACS Style

Mahdi Kioumarsi; Armando Benenato; Barbara Ferracuti; Stefania Imperatore. Residual Flexural Capacity of Corroded Prestressed Reinforced Concrete Beams. Metals 2021, 11, 442 .

AMA Style

Mahdi Kioumarsi, Armando Benenato, Barbara Ferracuti, Stefania Imperatore. Residual Flexural Capacity of Corroded Prestressed Reinforced Concrete Beams. Metals. 2021; 11 (3):442.

Chicago/Turabian Style

Mahdi Kioumarsi; Armando Benenato; Barbara Ferracuti; Stefania Imperatore. 2021. "Residual Flexural Capacity of Corroded Prestressed Reinforced Concrete Beams." Metals 11, no. 3: 442.

Journal article
Published: 03 April 2020 in Buildings
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The out-of-plane behaviour of the walls as a consequence of an earthquake is the main vulnerability of existing masonry structures. In the case of rigid in compression not tensile resistant material, incremental dynamic analyses may be employed to evaluate the effective strength of a rocking element. When the seismic capacity of the wall is inadequate, retrofit interventions are required to assure an acceptable safety level. Conventional seismic retrofitting techniques on masonry walls influence the seismic performance of the element, which typically is modified in an out-of-plane bending behaviour. In this paper, analytical investigations are presented to investigate the possibility of a seismic retrofitting intervention able to increase the seismic strength of the wall without modifying its seismic behaviour. The analysed retrofitting technique consists in the application of composite vertical bars either in the middle section of the wall or at its external surfaces. The seismic behaviour of the retrofitted masonry wall is analytically evaluated by means of a parametric incremental dynamic analysis, carried out with an ad hoc in-house software. The effectiveness of the intervention is analysed in terms of level of seismic improvement, defined as the ratio between the seismic capacity of the reinforced and unreinforced walls.

ACS Style

Simona Coccia; Fabio Di Carlo; Stefania Imperatore. Masonry Walls Retrofitted with Vertical FRP Rebars. Buildings 2020, 10, 72 .

AMA Style

Simona Coccia, Fabio Di Carlo, Stefania Imperatore. Masonry Walls Retrofitted with Vertical FRP Rebars. Buildings. 2020; 10 (4):72.

Chicago/Turabian Style

Simona Coccia; Fabio Di Carlo; Stefania Imperatore. 2020. "Masonry Walls Retrofitted with Vertical FRP Rebars." Buildings 10, no. 4: 72.

Journal article
Published: 15 November 2019 in The Open Construction and Building Technology Journal
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Background: Corrosion of the reinforcing steel is a significant issue in construction engineering. As the corrosive attack propagates, the oxides accumulated on the steel-concrete interface cause a radial internal pressure in the structural element and induce a tensile stress state in the concrete with the consequent cracking. Except for few cases, the main outcomes on the behavior of reinforced concrete structures damaged by corrosion come from experimental results on artificially corroded specimens. For many years, the scientific community has been discussing the feasibility of artificial techniques to simulate the corrosion process in structural element. Specifically, the most disputed method is the accelerated electrolytic corrosion test, often characterized by high current intensities in order to reduce the duration of the experimental surveys. Objective: In the paper the influence of the current density on the degradation of a reinforced concrete element is investigated with particular reference to the kind of formed oxides and to the crack width. Methods: An experimental survey on steel rebars embedded in concrete cylinders and subjected to an electrolytic corrosion has been performed, with different increasing current densities. Furthermore, an analytical model, based on the classical thick-walled cylinder theory already proposed by the authors, is applied for validating the experimental results. Results: The oxides produced by artificial corrosion with different current densities are analyzed with X-ray diffractometry measurements. The influence of the current density on the crack widths is also pointed out. Conclusion: The analyses of the obtained results show that for the analysed specimens and current density range, no significant differences are found for the oxides composition. On the contrary the influence of the current density on the crack width is pointed out, and an upper limit of this parameter is indicated.

ACS Style

Stefania Imperatore; Zila Rinaldi. Cracking in Reinforced Concrete Structures Damaged by Artificial Corrosion: An Overview. The Open Construction and Building Technology Journal 2019, 13, 199 -213.

AMA Style

Stefania Imperatore, Zila Rinaldi. Cracking in Reinforced Concrete Structures Damaged by Artificial Corrosion: An Overview. The Open Construction and Building Technology Journal. 2019; 13 (1):199-213.

Chicago/Turabian Style

Stefania Imperatore; Zila Rinaldi. 2019. "Cracking in Reinforced Concrete Structures Damaged by Artificial Corrosion: An Overview." The Open Construction and Building Technology Journal 13, no. 1: 199-213.

Journal article
Published: 01 November 2019 in Construction and Building Materials
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ACS Style

Stefania Imperatore; Zila Rinaldi. Experimental behavior and analytical modeling of corroded steel rebars under compression. Construction and Building Materials 2019, 226, 126 -138.

AMA Style

Stefania Imperatore, Zila Rinaldi. Experimental behavior and analytical modeling of corroded steel rebars under compression. Construction and Building Materials. 2019; 226 ():126-138.

Chicago/Turabian Style

Stefania Imperatore; Zila Rinaldi. 2019. "Experimental behavior and analytical modeling of corroded steel rebars under compression." Construction and Building Materials 226, no. : 126-138.

Conference paper
Published: 29 October 2019 in IOP Conference Series: Materials Science and Engineering
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The aim of this work is to evaluate the influence of corrosion on the lateral displacement capacity and on the global ductility of reinforced concrete (RC) elements, using finite element (FE) analysis. The corrosive phenomenon is simulated accounting for its consequences on the reinforcing bars (variation of the steel geometry and mechanical properties), on the concrete (cracking) and at the interface (variation of the bond-slip behaviour). The parametric analysis, using numerical models, highlights how corrosion significantly changes the structural performance of the element in terms of deformability.

ACS Style

S Imperatore; M Kioumarsi. Lateral displacement capacity of reinforced concrete elements damaged by corrosion. IOP Conference Series: Materials Science and Engineering 2019, 652, 012032 .

AMA Style

S Imperatore, M Kioumarsi. Lateral displacement capacity of reinforced concrete elements damaged by corrosion. IOP Conference Series: Materials Science and Engineering. 2019; 652 (1):012032.

Chicago/Turabian Style

S Imperatore; M Kioumarsi. 2019. "Lateral displacement capacity of reinforced concrete elements damaged by corrosion." IOP Conference Series: Materials Science and Engineering 652, no. 1: 012032.

Conference paper
Published: 29 October 2019 in IOP Conference Series: Materials Science and Engineering
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Corrosion is the most commonly severe defect in reinforced concrete (RC) structures and it mainly causes reduced rebar cross-section. The corrosion rate is the determining parameter of the progress of corrosion-induced damage. The present work is focused on the application of finite element (FE) analysis, using DIANA, to predict the residual capacity of reinforced concrete beam with different degree of corrosion. To this aim, existing experimental data is used to develop a FE model of corroded beams and to investigate their behaviour. This model is validated to predict the impact of time and current rate of corrosion on the residual load carrying capacity of corroded RC beams.

ACS Style

M Kioumarsi; Mh Baghban; S Imperatore. Effect of time dependent corrosion rate on residual capacity of corroded RC beam. IOP Conference Series: Materials Science and Engineering 2019, 652, 012031 .

AMA Style

M Kioumarsi, Mh Baghban, S Imperatore. Effect of time dependent corrosion rate on residual capacity of corroded RC beam. IOP Conference Series: Materials Science and Engineering. 2019; 652 (1):012031.

Chicago/Turabian Style

M Kioumarsi; Mh Baghban; S Imperatore. 2019. "Effect of time dependent corrosion rate on residual capacity of corroded RC beam." IOP Conference Series: Materials Science and Engineering 652, no. 1: 012031.

Journal article
Published: 02 July 2019 in Buildings
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Worldwide, steel corrosion is one of the greatest deterioration problems for reinforced concrete structures. Comparing some experimental results from literature with a complex FEM model, the present paper points out the principal aspects that characterize the static behavior of reinforced concrete (RC) elements damaged by corrosion. Moreover, the nondimensional abaci defined for some specific case studies finalized to the evaluation of the residual flexural strength of corroded elements highlight the dangerousness of the corrosion degradation if the failure of the element is governed by the steel.

ACS Style

Antonio Bossio; Stefania Imperatore; Mahdi Kioumarsi. Ultimate Flexural Capacity of Reinforced Concrete Elements Damaged by Corrosion. Buildings 2019, 9, 160 .

AMA Style

Antonio Bossio, Stefania Imperatore, Mahdi Kioumarsi. Ultimate Flexural Capacity of Reinforced Concrete Elements Damaged by Corrosion. Buildings. 2019; 9 (7):160.

Chicago/Turabian Style

Antonio Bossio; Stefania Imperatore; Mahdi Kioumarsi. 2019. "Ultimate Flexural Capacity of Reinforced Concrete Elements Damaged by Corrosion." Buildings 9, no. 7: 160.

Journal article
Published: 01 September 2017 in Construction and Building Materials
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ACS Style

Stefania Imperatore; Zila Rinaldi; Carlo Drago. Degradation relationships for the mechanical properties of corroded steel rebars. Construction and Building Materials 2017, 148, 219 -230.

AMA Style

Stefania Imperatore, Zila Rinaldi, Carlo Drago. Degradation relationships for the mechanical properties of corroded steel rebars. Construction and Building Materials. 2017; 148 ():219-230.

Chicago/Turabian Style

Stefania Imperatore; Zila Rinaldi; Carlo Drago. 2017. "Degradation relationships for the mechanical properties of corroded steel rebars." Construction and Building Materials 148, no. : 219-230.

Journal article
Published: 01 July 2017 in Key Engineering Materials
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The historical masonry buildings are characterised by a great vulnerability regard the seismic action, as the recent events occurred in Central Italy have highlighted. During the seismic emergency the authors, in collaboration with the Civil Protection Department as part of the ReLUIS activities, have carried out usability inspections, analysing also the case study described in this paper. The structure, a school in Teramo, was already affected by previously seismic damages and it has been highly involved by the seismic events abovementioned. In this work the results of first inspection, reported in the AeDES form, and a more accurate visual inspection are presented in terms of detection of the crack patterns and evaluation of the seismic damages index. Moreover the vulnerability index has been calculated according to the GNDT 2° level method. The vulnerability index is finally used to calculate the damage index expected for the seismic intensity registered during the seismic event of October 30, 2016, and compared with the observed post-seismic damage level.

ACS Style

Silvia Colonna; Stefania Imperatore; Maria Zucconi; Barbara Ferracuti. Post-Seismic Damage Assessment of a Historical Masonry Building: The Case Study of a School in Teramo. Key Engineering Materials 2017, 747, 620 -627.

AMA Style

Silvia Colonna, Stefania Imperatore, Maria Zucconi, Barbara Ferracuti. Post-Seismic Damage Assessment of a Historical Masonry Building: The Case Study of a School in Teramo. Key Engineering Materials. 2017; 747 ():620-627.

Chicago/Turabian Style

Silvia Colonna; Stefania Imperatore; Maria Zucconi; Barbara Ferracuti. 2017. "Post-Seismic Damage Assessment of a Historical Masonry Building: The Case Study of a School in Teramo." Key Engineering Materials 747, no. : 620-627.

Journal article
Published: 01 July 2017 in Key Engineering Materials
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Seismic behaviour and vulnerability of existing masonry structures are typically characterized by out-of-plane response of vertical walls. The dynamic response of such elements can be analytically assessed considering the dynamic equation of rigid bodies not resistant to tensile stresses. Many studies available in literature have highlighted the vulnerability of this type of structures against out-of-plane movements. In order to withstand horizontal seismic actions, appropriate and effective retrofitting interventions have to be properly designed. In this paper, the rocking response of a masonry wall retrofitted with elastic GFRP bars is investigated. A parametric survey is also carried out, to evaluate the increase in strength of the masonry wall, due to the presence of the composite material.

ACS Style

Simona Coccia; Fabio Di Carlo; Stefania Imperatore. Seismic Behaviour of Rocking Elements Reinforced with Composite Materials. Key Engineering Materials 2017, 747, 604 -611.

AMA Style

Simona Coccia, Fabio Di Carlo, Stefania Imperatore. Seismic Behaviour of Rocking Elements Reinforced with Composite Materials. Key Engineering Materials. 2017; 747 ():604-611.

Chicago/Turabian Style

Simona Coccia; Fabio Di Carlo; Stefania Imperatore. 2017. "Seismic Behaviour of Rocking Elements Reinforced with Composite Materials." Key Engineering Materials 747, no. : 604-611.

Book chapter
Published: 03 November 2016 in Brick and Block Masonry
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ACS Style

S. Coccia; F. Di Carlo; S. Imperatore; C Casapulla; Claudio Modena; F Da Porto; M Valluzzi. Strength reduction factor for out-of-plane failure mechanisms of masonry walls. Brick and Block Masonry 2016, 137 -144.

AMA Style

S. Coccia, F. Di Carlo, S. Imperatore, C Casapulla, Claudio Modena, F Da Porto, M Valluzzi. Strength reduction factor for out-of-plane failure mechanisms of masonry walls. Brick and Block Masonry. 2016; ():137-144.

Chicago/Turabian Style

S. Coccia; F. Di Carlo; S. Imperatore; C Casapulla; Claudio Modena; F Da Porto; M Valluzzi. 2016. "Strength reduction factor for out-of-plane failure mechanisms of masonry walls." Brick and Block Masonry , no. : 137-144.

Journal article
Published: 06 August 2016 in Bulletin of Earthquake Engineering
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ACS Style

Simona Coccia; Fabio Di Carlo; Stefania Imperatore. Force reduction factor for out-of-plane simple mechanisms of masonry structures. Bulletin of Earthquake Engineering 2016, 15, 1241 -1259.

AMA Style

Simona Coccia, Fabio Di Carlo, Stefania Imperatore. Force reduction factor for out-of-plane simple mechanisms of masonry structures. Bulletin of Earthquake Engineering. 2016; 15 (3):1241-1259.

Chicago/Turabian Style

Simona Coccia; Fabio Di Carlo; Stefania Imperatore. 2016. "Force reduction factor for out-of-plane simple mechanisms of masonry structures." Bulletin of Earthquake Engineering 15, no. 3: 1241-1259.

Journal article
Published: 01 August 2016 in Composites Part B: Engineering
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The ultimate behavior of thin reinforced concrete structures, such as slabs, can be governed by punching due to point loads. This premature brittle failure mode can occur in bridge deck slabs, often subjected to severe conditions of loads concentrated in small areas, and characterized by a reduced thickness. In this kind of structures, a proper punching reinforcement is not applicable, but the local and global behavior can be improved by the addition of short fibers. Three full-scale slabs, simulating bridge decks, were tested in the Laboratory of the University of Rome Tor Vergata, to investigate the effect of lightweight fiber reinforced material on the punching shear resistance. Furthermore, ashes coming from the combustion of Municipal Solid Waste (MSW), with pozzolanic reaction, were added to the concrete mix. The obtained results are presented, discussed and compared with the MC2010 provisions

ACS Style

Angelo Caratelli; Stefania Imperatore; Alberto Meda; Zila Rinaldi. Punching shear behavior of lightweight fiber reinforced concrete slabs. Composites Part B: Engineering 2016, 99, 257 -265.

AMA Style

Angelo Caratelli, Stefania Imperatore, Alberto Meda, Zila Rinaldi. Punching shear behavior of lightweight fiber reinforced concrete slabs. Composites Part B: Engineering. 2016; 99 ():257-265.

Chicago/Turabian Style

Angelo Caratelli; Stefania Imperatore; Alberto Meda; Zila Rinaldi. 2016. "Punching shear behavior of lightweight fiber reinforced concrete slabs." Composites Part B: Engineering 99, no. : 257-265.

Journal article
Published: 04 March 2016 in International Journal of Structural Integrity
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Purpose Corrosion of reinforcement, and mainly the one induced by chloride attack, is one of the leading causes of deterioration in reinforced concrete structures. Then, it is very important to develop a simplified analytical tool, able to simulate the corrosion processes and the consequences for the structural safety. Design/methodology/approach Aim of this paper is the definition of a simplified integrated procedure, able to predict the decay with the time of the bending moment and axial force resistance of a reinforced concrete section, exposed to a chloride attack. Starting from various literature findings, the rebar mass loss in time is evaluated and related to the chloride distribution and content in time. Then the mechanical properties of the corroded rebars are evaluated by means of strength decay laws developed by the authors. Finally, moment curvature relationships and bending moment – axial force (M-N) interaction envelopes are defined. Findings The strength variation with the time can be easily evaluated and then the life cycle and the timing of repair or rehabilitation strategies can be estimated. Originality/value The proposed methodology can be considered a very simple, but useful tool for a first analysis of the strength reduction in time, due to chloride pitting corrosion, before performing more complex and time-spending analyses.

ACS Style

Stefania Imperatore; Angelo Leonardi; Zila Rinaldi. Strength decay of RC sections for chloride attack. International Journal of Structural Integrity 2016, 7, 1 .

AMA Style

Stefania Imperatore, Angelo Leonardi, Zila Rinaldi. Strength decay of RC sections for chloride attack. International Journal of Structural Integrity. 2016; 7 (2):1.

Chicago/Turabian Style

Stefania Imperatore; Angelo Leonardi; Zila Rinaldi. 2016. "Strength decay of RC sections for chloride attack." International Journal of Structural Integrity 7, no. 2: 1.

Conference paper
Published: 01 January 2016 in INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015)
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In moderate and aggressive environmental condition, old reinforced concrete structures are often subjected to corrosive phenomena. Corrosion causes cracking, loss of diameter in reinforcement and variation of the bond behavior between steel and concrete. Then, in presence of cyclic actions like the seismic ones, old R.C. elements vary their ultimate drift, ductility, plastic rotation capacity and energy dissipation with the corrosion level. The problem is of current interest: the issue has been introduced in some paragraph of the Model Code 2010 and a committee is now drafting a new document on assessment strategies on existing concrete structures also damaged by corrosion. In this work, a first step on the analysis of the impact of the corrosion on the seismic behavior of R.C. elements is assessed: by mean FEM analyses, of a poor detailed column/foundation joint is analyzed in a parametric way in order to evaluate the influence of the bond-slip degradation by corrosion on the element flexural capacity.

ACS Style

Stefania Imperatore. Influence of the bond-slip relationship on the flexural capacity of R.C. joints damaged by corrosion. INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015) 2016, 1738, 270021 .

AMA Style

Stefania Imperatore. Influence of the bond-slip relationship on the flexural capacity of R.C. joints damaged by corrosion. INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015). 2016; 1738 ():270021.

Chicago/Turabian Style

Stefania Imperatore. 2016. "Influence of the bond-slip relationship on the flexural capacity of R.C. joints damaged by corrosion." INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015) 1738, no. : 270021.

Journal article
Published: 31 December 2014 in Materials and Structures
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ACS Style

Simona Coccia; Stefania Imperatore; Zila Rinaldi. Influence of corrosion on the bond strength of steel rebars in concrete. Materials and Structures 2014, 49, 537 -551.

AMA Style

Simona Coccia, Stefania Imperatore, Zila Rinaldi. Influence of corrosion on the bond strength of steel rebars in concrete. Materials and Structures. 2014; 49 (1-2):537-551.

Chicago/Turabian Style

Simona Coccia; Stefania Imperatore; Zila Rinaldi. 2014. "Influence of corrosion on the bond strength of steel rebars in concrete." Materials and Structures 49, no. 1-2: 537-551.

Conference paper
Published: 01 January 2013 in IABSE Conference, Rotterdam 2013: Assessment, Upgrading and Refurbishment of Infrastructures
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This paper presents the experimental behaviour of two reinforced concrete T-beams strengthened in shear with CFRP. The beams are extracted from an important building of the mid-'30s in Rome. The goal of this research is to evaluate the shear strength of the retrofitted beams with the simultaneous occurrence of a negative bending moment. The tests are performed at the Experimental Laboratory of the Structural Department of the University “Roma Tre”. In the meantime the two beams are modelled with the software ATENA in order to perform numerical simulations of the tests. The numerical results seem to be in good agreement with the experimental data in terms of load– displacement response, strain state, crack pattern and failure mode.

ACS Style

Stefania Imperatore; Davide Lavorato; Camillo Nuti; Silvia Santini; Lorena Sguerri. Shear Behavior Of Existing RC T-Beams Strengthened With CFRP. IABSE Conference, Rotterdam 2013: Assessment, Upgrading and Refurbishment of Infrastructures 2013, 1 .

AMA Style

Stefania Imperatore, Davide Lavorato, Camillo Nuti, Silvia Santini, Lorena Sguerri. Shear Behavior Of Existing RC T-Beams Strengthened With CFRP. IABSE Conference, Rotterdam 2013: Assessment, Upgrading and Refurbishment of Infrastructures. 2013; ():1.

Chicago/Turabian Style

Stefania Imperatore; Davide Lavorato; Camillo Nuti; Silvia Santini; Lorena Sguerri. 2013. "Shear Behavior Of Existing RC T-Beams Strengthened With CFRP." IABSE Conference, Rotterdam 2013: Assessment, Upgrading and Refurbishment of Infrastructures , no. : 1.

Book chapter
Published: 01 January 2012 in Anisotropic Elasticity
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Corrosion of the reinforcement is a common form of degradation of reinforced concrete structures. As a matter of fact the chemical attack varies the mechanical properties of both the steel rebars and concrete, and the bond characteristics. The study presented in the paper is mainly devoted to the analysis of the corrosion effects on the steel rebars and at the steelconcrete interface, and their influence on the local and global behaviour of simple R/C elements. At this aim, experimental analyses are developed, for the calibration of the constitutive relationships of both the steel rebars and the bond-slip response, in presence of corrosion. Finally the obtained laws are implemented in an analytical model, developed by the authors, in order to evaluate the influence of the corrosion on the global behaviour of simple R/C beam elements.

ACS Style

Stefania Imperatore; Angelo Leonardi; Zila Rinaldi. Mechanical Behaviour of Corroded Rebars in Reinforced Concrete Elements. Anisotropic Elasticity 2012, 207 -220.

AMA Style

Stefania Imperatore, Angelo Leonardi, Zila Rinaldi. Mechanical Behaviour of Corroded Rebars in Reinforced Concrete Elements. Anisotropic Elasticity. 2012; ():207-220.

Chicago/Turabian Style

Stefania Imperatore; Angelo Leonardi; Zila Rinaldi. 2012. "Mechanical Behaviour of Corroded Rebars in Reinforced Concrete Elements." Anisotropic Elasticity , no. : 207-220.

Book chapter
Published: 28 May 2010 in Concrete Under Severe Conditions, Two Volume Set
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ACS Style

Zila Rinaldi; S Imperatore; C Valente; L Pardi. Experimental evaluation of the structural behaviour of corroded prestressed concrete beams. Concrete Under Severe Conditions, Two Volume Set 2010, 429 -436.

AMA Style

Zila Rinaldi, S Imperatore, C Valente, L Pardi. Experimental evaluation of the structural behaviour of corroded prestressed concrete beams. Concrete Under Severe Conditions, Two Volume Set. 2010; ():429-436.

Chicago/Turabian Style

Zila Rinaldi; S Imperatore; C Valente; L Pardi. 2010. "Experimental evaluation of the structural behaviour of corroded prestressed concrete beams." Concrete Under Severe Conditions, Two Volume Set , no. : 429-436.

Journal article
Published: 27 April 2010 in Construction and Building Materials
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Corrosion phenomena and related effects, such as size reduction in both rebars and strands, bond decay at steel–concrete interface, and cracking in the surrounding concrete, are particularly critical in prestressed-concrete members, not only for safety reasons, but also for their huge potential socio-economic effects. As a matter of fact, this technique has been used for the last 50 years in the majority of viaducts and bridges built in many countries like Italy. In order to evaluate the influence of the corrosion on prestressed pretensioned beams, a number of tests has been carried out in the Laboratory of the University of Rome “Tor Vergata”. Nine prestressed beams (section size 200 × 300; total length 3000 mm; clear span 2700 mm) were first subjected to artificial corrosion, to obtain different damage levels, and then were tested in four-point bending. The results clearly show the sizable effects that corrosion has on the ultimate capacity (that is significantly reduced), on the failure mode and on the structural response, that turns from ductile to brittle.

ACS Style

Zila Rinaldi; Stefania Imperatore; Claudio Valente. Experimental evaluation of the flexural behavior of corroded P/C beams. Construction and Building Materials 2010, 24, 2267 -2278.

AMA Style

Zila Rinaldi, Stefania Imperatore, Claudio Valente. Experimental evaluation of the flexural behavior of corroded P/C beams. Construction and Building Materials. 2010; 24 (11):2267-2278.

Chicago/Turabian Style

Zila Rinaldi; Stefania Imperatore; Claudio Valente. 2010. "Experimental evaluation of the flexural behavior of corroded P/C beams." Construction and Building Materials 24, no. 11: 2267-2278.