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Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 21 febbraio 2023

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1

Kopas, Peter, Lenka Jakubovičová, Milan Vaško e Marián Handrik. "Fatigue Resistance of Reinforcing Steel Bars". Procedia Engineering 136 (2016): 193–97. http://dx.doi.org/10.1016/j.proeng.2016.01.196.

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2

Wang, Wei, Jie Chen, Bo Diao, Xuefei Guan, Jingjing He e Min Huang. "Bayesian Fatigue Life Prediction of Corroded Steel Reinforcing Bars". Advances in Civil Engineering 2021 (28 dicembre 2021): 1–15. http://dx.doi.org/10.1155/2021/4632152.

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This paper presents a general method for fatigue life prediction of corroded steel reinforcing bars. A fatigue testing on standard specimens with pitting corrosion is carried out to obtain corrosion fatigue data. The maximum corrosion degree (MCD), characterizing the most severe site of the corrosion pit, is identified to have a log-linear relationship with the fatigue life. A fatigue life model incorporating the MCD and the stress range for corroded steel reinforcing bars is proposed. The model parameters are identified using the testing data, and the model is considered as the baseline model. To utilize the proposed model for life prediction of corroded steel reinforcing bars with different geometries and working conditions, the Bayesian method is employed to update the baseline model. The effectiveness of the overall method is demonstrated using independent datasets of realistic steel reinforcing bars.

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3

Hyland, C. W. K., e A. Ouwejan. "Fatigue of reinforcing bars during hydro-demolition". Journal of Physics: Conference Series 843 (maggio 2017): 012033. http://dx.doi.org/10.1088/1742-6596/843/1/012033.

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4

Li, Shibin, Hongwei Tang, Qiang Gui e Zhongguo John Ma. "Fatigue behavior of naturally corroded plain reinforcing bars". Construction and Building Materials 152 (ottobre 2017): 933–42. http://dx.doi.org/10.1016/j.conbuildmat.2017.06.173.

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5

Schwarzkopf, Michael. "Fatigue Design of Tack-Welded Mesh Reinforcing Bars". Structural Engineering International 5, n. 2 (maggio 1995): 102–6. http://dx.doi.org/10.2749/101686695780601240.

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6

Real, Enrique, Cristina Rodríguez, A. Fernández Canteli e F. Javier Belzunce. "Influence of the Shot Peening Process on the Fatigue Behaviour of Duplex Stainless Steel Reinforcing Bars". Materials Science Forum 539-543 (marzo 2007): 4981–86. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.4981.

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The influence of shot peening on the fatigue properties of duplex stainless steel reinforcing bars manufactured using both hot and cold rolled processes was studied. From determination of the S-N curves, the experimental results show that shot peening improves the fatigue behaviour of the re-bars, but that the improvement is much greater for the hot rolled bars. A more severe peening action capable of promoting greater plastic deformation of the bar surface needs to be used to improve the fatigue resistance of cold rolled corrugated bars.

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7

Koulouris, Konstantinos F., e Charis Apostolopoulos. "Fatigue damage indicator of different types of reinforcing bars". International Journal of Structural Integrity 13, n. 4 (28 marzo 2022): 632–48. http://dx.doi.org/10.1108/ijsi-10-2019-0103.

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PurposeAs it is widely known, corrosion constitutes a major deterioration factor for reinforced concrete (RC) structures which are located on coastal areas. This phenomenon combined with repeated loads, as earthquake events, negatively affects their service life. Moreover, microstructure of steel reinforcing bars has significant impact either on their corrosion resistance or on their fatigue life.Design/methodology/approachIn the present manuscript an effort has been made to investigate the effect of corrosive factor on fatigue response for two types of steel reinforcement; Tempcore steel reinforcing bars and a new generation dual phase (DP) steel reinforcement.FindingsThe findings of this experimental study showed that DP steel reinforcement led to better results regarding its capacity to bear repeated loads to satisfactory degree after corrosion, although this type of steel has less stringent mechanical properties.Originality/valueAdditionally, a fatigue damage material indicator is proposed as a parameter that could rank material quality and its suitability for a certain application. The results of this investigation showed that the fatigue damage indicator can be used as an appropriate index in order to evaluate the overall performance of materials, in terms of strength and ductility capacity.

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8

Li, Shibin. "Fatigue of Reinforcing Steel Bars Subjected to Natural Corrosion". Open Civil Engineering Journal 5, n. 1 (29 aprile 2011): 69–74. http://dx.doi.org/10.2174/1874149501105010069.

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9

Zhuang, Chenxu, Jinquan Zhang e Ruinian Jiang. "Fatigue Flexural Performance of Short-Span Reinforced Concrete T-Beams Considering Overloading Effect". Baltic Journal of Road and Bridge Engineering 15, n. 2 (25 giugno 2020): 89–110. http://dx.doi.org/10.7250/bjrbe.2020-15.474.

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Traffic volume increase and higher proportion of heavier trucks have raised the potential risk of fatigue failure of short-span reinforced concrete beams. To investigate the fatigue behavior of short-span reinforced concrete beams with and without the overload effect, nine 5 m reinforced concrete T-beams were cast and tested. Two beams were tested under static loading to determine the ultimate strength; the remaining seven beams were subjected to cyclic loading with constant-amplitude load ranges. In addition, two of the seven beams were subjected to instant overloading. It was observed that the typical failure mode under cyclic loading was the fatigue fracture of tensile reinforcing bars. The introduction of instant overloading resulted in a remarkable reduction of fatigue life. Among all the parameters, the stress range of the reinforcing bars showed the highest effect on the fatigue life. In the end, the fatigue safety provisions in the current reinforced concrete beam design codes were evaluated based on the fatigue limits and S-N curves.

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10

Islam, M. A. "Essential Mechanical Properties of Structural Steels for Steel Reinforced Buildings in the Earthquake Sensitive Areas". Journal of Scientific Research 4, n. 1 (23 dicembre 2011): 51. http://dx.doi.org/10.3329/jsr.v4i1.7069.

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During earthquake, the ground along with its various natural and manmade structures experiences shaking of various intensities and frequencies depending on the nature of the earthquake. The loading activities caused by earthquakes on various structures are very much cyclic type, which is popularly known as fatigue loading. On the other hand, for modern high-rise buildings a large volume of steel bar is used to reinforce the concrete because of the pioneer role of steel bars embedded inside the concrete for safety of the buildings. In this study various mechanical properties of reinforcing steel bars that are essential to counter balance the earthquake effects have been identified first. At the same time these essential mechanical properties have been defined and studied for most commonly used reinforcing steel bars. For doing this, both the conventional and advanced structural steels were selected. The mechanical properties and fatigue behaviours of these steels have been presented and discussed in this paper. Keywords: Earthquake; High-rise buildings; Reinforcing steel bars; Conventional structural steel; Advanced structural steel.© 2012 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi: http://dx.doi.org/10.3329/jsr.v4i1.7069 J. Sci. Res. 4 (1), 51-63 (2012)

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11

D'Antino, Tommaso, Marco A. Pisani e Carlo Poggi. "Fatigue tensile testing of glass fiber-reinforced polymer reinforcing bars". Construction and Building Materials 346 (settembre 2022): 128395. http://dx.doi.org/10.1016/j.conbuildmat.2022.128395.

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12

Apostolopoulos, Charis, George Konstantopoulos e Konstantinos Koulouris. "Seismic resistance prediction of corroded S400 (BSt420) reinforcing bars". International Journal of Structural Integrity 9, n. 1 (5 febbraio 2018): 119–38. http://dx.doi.org/10.1108/ijsi-02-2017-0008.

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Purpose Structures in seismic areas, during their service lifetime, are subjected to numerous seismic loads that certainly affect their structural integrity. The degradation of these structures, to a great extent, depends on the scale of seismic events, the steel mechanical performance on reversal loads and its resistance to corrosion phenomena. The paper aims to discuss these issues. Design/methodology/approach Based on the experimental results of seismic steel behavior S400 (BSt III), which was widely used in the past years, a prediction study of seismic steel behavior was conducted in the current study. This prediction on behavior of both reference and corroded steel was succeeded through a simulation of experimental low cycle fatigue conditions (LCF – strain controlled). Findings At the same time, the present study analyses fatigue factors (ef, a, fSR, ed, ep, R, b) that define their inelastic relation between tension – strain and a prediction model on behavior of both reference and corroded steel rebar, in seismic loads conditions (LCF), is proposed. Originality/value Moreover, this study dealt with the synergy of corrosion factor and the existence of superficial ribs (ribbed and smoothed) in seismic behavior of steel bar S400 (BSt420). The S-N curves that are exported can be resulted in a first attempt of prediction of anti-seismic behavior on reinforced concrete structures with this the same steel class.

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13

Tang, Hong Wei, e Shi Bin Li. "Experimental Study on Fatigue Behavior of Low-Strength Concrete Beams". Applied Mechanics and Materials 94-96 (settembre 2011): 795–98. http://dx.doi.org/10.4028/www.scientific.net/amm.94-96.795.

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Reinforced concrete (RC) structures taking full advantages of concrete and reinforcing steel bars are widely applied in civil engineering. Concrete bridges are subjected to alternate loads as well as static loads, much importance should be attached to their fatigue. Reinforced concrete beams are the elementary members of concrete bridges. Fatigue failure mode and fatigue life prediction of normal or high-strength RC beams were the research focus at home. The fatigue behavior of low-strength RC beams was studied through four-point bending fatigue test in the paper. The test results indicated that all beams fractured for concrete shear failure, which made the fatigue life of low-strength concrete beams drop greatly compared to that of normal or high-strength concrete beams, because the fatigue failure of normal or high-strength concrete beams were caused by the fracture of one or more reinforcing steel bars; the mid-span deflection development of low-strength RC beams had three phases, and the middle phase occupied about 90% of whole fatigue life, also in the second phase the mid-span deflection developed linearly with the increasing of cycle numbers. This research work provides necessary basis for the fatigue life deterioration of low-strength RC beams.

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14

MATSUMOTO, Nobuyuki. "A study on fatigue behavior of cold-worked deformed reinforcing bars." Doboku Gakkai Ronbunshu, n. 396 (1988): 177–86. http://dx.doi.org/10.2208/jscej.1988.396_177.

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15

Noël, Martin, e Khaled Soudki. "Fatigue Behavior of GFRP Reinforcing Bars in Air and in Concrete". Journal of Composites for Construction 18, n. 5 (ottobre 2014): 04014006. http://dx.doi.org/10.1061/(asce)cc.1943-5614.0000468.

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16

Caprili, Silvia, Jörg Moersch e Walter Salvatore. "Mechanical Performance versus Corrosion Damage Indicators for Corroded Steel Reinforcing Bars". Advances in Materials Science and Engineering 2015 (2015): 1–19. http://dx.doi.org/10.1155/2015/739625.

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Abstract (sommario):

The experimental results of a testing campaign including tensile and low-cycle fatigue tests on different reinforcing steel bar types in the as-delivered and corroded condition are presented. Experimental data were statistically analyzed adopting ANOVA technique; Performance Indicators (PIs), describing the mechanical performance characteristics of reinforcements, and Corrosion Damage Indicators (CDIs), describing the detrimental effects of corrosion phenomena, were determined and correlated in order to evaluate the influence of corrosion on the behaviour of reinforcing steels, providing useful information for designers in addition to what is presented in current standards.

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17

Rezansoff, Telvin, James A. Zacaruk e Jeffrey G. Afseth. "High cycle (fatigue) resistance of reinforced concrete beams with lap splices". Canadian Journal of Civil Engineering 20, n. 4 (1 agosto 1993): 642–49. http://dx.doi.org/10.1139/l93-081.

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Full-scale specimens were tested so that lap spliced bottom bars were subjected to cyclic tension loading. The major variable was the degree of transverse confining reinforcement (stirrups) provided along the lap. Lap splices were confined either with the maximum transverse reinforcement deemed to be effective for static loading, permitting the use of shorter lap splice lengths, or with stirrups spaced at approximately one half the effective depth of the beam, requiring the use of a longer lap length. Failure in all specimens with heavier stirrups (shorter laps) occurred with fatiguing of the reinforcing steel, showing fatigue resistances that were comparable with the results for continuous bars tested in flexure. With the lighter (nominal) stirrups, fatigue loading usually produced a splice failure, where the confining concrete split away from the lap in a typical bond failure after fewer load cycles. For comparable bond resistance under static loading, the beams with the heavier stirrup confinement along a shorter lap length were superior under fatigue loading. As previously shown with low cycle, high intensity reversal (seismic) loading, the current study shows that it is prudent to provide a high degree of transverse reinforcing confinement to lap splices that are subjected to fatigue loading. Key words: concrete, reinforcement, lap splices, fatigue, bond, beams, confinement, stirrups, tension.

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18

Khamichonok, V. V., N. G. Matveev, I. A. Mirochnik e E. V. Chinоikalov. "Elaboration of a technology of class A500 reinforcing bar production with a complex of additional properties as per GOST 34028–2016 at JSC EVRAZ ZSMK". Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 75, n. 6 (26 luglio 2019): 711–17. http://dx.doi.org/10.32339/0135-5910-2019-6-711-717.

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On 01.01.2019 the interstate standard GOST 34028–2016 “Reinforcing bars for concrete structures. Technical specifications” will come into force, which will replace the standards GOST R 52544 (in the part of A500S class), GOST 10884 and GOST 5781. The new standard will introduce a complex of additional properties for reinforcing bars of A500 class to provide reliability of its application in the high rise construction, in areas of increased seismic activity, in aggressive media (sea areas) and in bridges construction (increased cyclic loads). In view of this a complex of work accomplished at JSC EVRAZ ZSMK to elaborate technologies of production A500 reinforcing bars, completely meeting the requirements of GOST 34028 regarding base characteristics (tensile strength, yield strength, elongation, technological ductility) as well as additional ones (corrosion resistance, endurance, high ductility). In addition, an evaluation of fire resistance and fire safety of the A500 class rebar (the characteristics not present in the standard) accomplished. To determine the additional characteristics the following tests done: for tensile and bending for rebar of high ductility (class A500E), for corrosion resistance (class A500K), for endurance (class A500У), for fire resistance and fire safety (class А500С and А500Е). As a result of the work accomplished it was determined, that reinforcing bars of trial production of 18Г2С steel, micro-alloyed by vanadium, meet the requirements of GOST 34028–2016 to A500E class. Also determined that the reinforcing bars of trial production of class А500К and А500Е, made of steel grades Ст3Гпс, Ст3Гсп and 18Г2С meet the requirements of GOST 34028 regarding corrosion resistance for their application in structures without preliminary strain. Besides it was shown, that the reinforcing bars of regular production made of Ст3пс and Ст3Гсп steel grades meet the requirements of GOST 34028–2016 to class A500У regarding to resistance against fatigue multiple repeating cyclic loads. The experiment data regarding the fire resistance and fire safety obtained for trial and regular production enabled to determine the heating temperature effect on the rebar mechanical properties depending on the steel chemical composition and the bar diameter.

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19

Kashani, Mohammad M., Shunyao Cai, Sean A. Davis e Paul J. Vardanega. "Influence of Bar Diameter on Low-Cycle Fatigue Degradation of Reinforcing Bars". Journal of Materials in Civil Engineering 31, n. 4 (aprile 2019): 06019002. http://dx.doi.org/10.1061/(asce)mt.1943-5533.0002637.

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20

REAL, E., C. RODRÍGUEZ, F. J. BELZUNCE, P. SANJURJO, A. F. CANTELI e I. F. PARIENTE. "Fatigue behaviour of duplex stainless steel reinforcing bars subjected to shot peening". Fatigue & Fracture of Engineering Materials & Structures 32, n. 7 (luglio 2009): 567–72. http://dx.doi.org/10.1111/j.1460-2695.2009.01360.x.

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21

Kashani, Mohammad M., Aneeka K. Barmi e Viktoria S. Malinova. "Influence of inelastic buckling on low-cycle fatigue degradation of reinforcing bars". Construction and Building Materials 94 (settembre 2015): 644–55. http://dx.doi.org/10.1016/j.conbuildmat.2015.07.102.

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22

Apostolopoulos, C. A., e M. P. Papadopoulos. "Tensile and low cycle fatigue behavior of corroded reinforcing steel bars S400". Construction and Building Materials 21, n. 4 (aprile 2007): 855–64. http://dx.doi.org/10.1016/j.conbuildmat.2005.12.012.

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23

Sukach, Mykhailo, Myroslav Kindrachuk e Valeriy Makarenko. "Research of corrosion and mechanical resistance of reinforce-ment steels designated for operation in hydraulic structures". Pidvodni tehnologii, n. 11 (29 ottobre 2021): 88–95. http://dx.doi.org/10.32347/uwt2021.11.1802.

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Abstract (sommario):

Analytical inspection showed that with a long service life of reinforced concrete structures of hydraulic structures, their individual elements such as reinforcing bars are destroyed due to insufficient fatigue and corrosion strength of the reinforcement metal. They occur mainly under the action of the main variable loads − bending, vibrations of reinforced concrete slabs, mechanical and erosion of the environment. The main causes of failure of the valve are its rupture and wear due to repeated action of force factors. The surface zone of the reinforcement in connection with concrete is especially intensively destroyed due to weak adhesion strength. The use of low-strength reinforcing steels can also be one of the reasons for the failure of reinforcement joints with concrete. Improving the corrosion and mechanical reliability of reinforced concrete structures of hydraulic structures is possible through the use of: for the manufacture of reinforcing bars which are the main power structure of reinforced concrete economically modified alloy steels, which undergo complex heat treatment and are characterized by high corrosion and fatigue properties. alternating) loads; The resistance against SCRN, VIR and corrosion-mechanical fatigue of reinforcing steels intended for the construction industry has been studied. It was found that the experimental steels, economically modified REE, copper-nickel, especially chromium niobium and vanadium meet the requirements of the International Standard NACE MR 0175-96 on chemical composition and mechanical properties, and steels of grades10HSNDA and 20F do not have a sufficiently high resistance SCRN <limits σ0.2min) and corrosion-fatigue failure, and steels of grades 20F and 06G2B showed low resistance to VIR (CLR> 6% and CTR> 3%). Therefore, it is necessary to carry out a full (100%) input control of corrosion and mechanical resistance of all materials involved in the manufacture of reinforced concrete structures for hydraulic purposes for operation in hydrogen sulfide-containing environment.

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24

Robl, Tobias, Christoph Hubertus Wölfle, Muhammed Zubair Shahul Hameed, Stefan Rappl, Christian Krempaszky e Ewald Werner. "An Approach to Predict Geometrically and Thermo-Mechanically Induced Stress Concentrations in Ribbed Reinforcing Bars". Metals 12, n. 3 (26 febbraio 2022): 411. http://dx.doi.org/10.3390/met12030411.

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Ribbed reinforcing steel bars (rebars) are used for the reinforcement of concrete structures. In service, they are subjected to cyclic loading. Several studies addressing the relationship between rib geometry, stresses at the rebar surface induced by service loads and the rebar fatigue performance can be found in literature. However, the rebar’s fatigue performance is also influenced by residual stresses originating from the manufacturing process. In this contribution, a modeling approach is proposed to examine geometrically and thermo-mechanically induced stress concentrations in ribbed reinforcing bars made of the steel grade B500B. A linear-elastic load stress analysis and a thermo-mechanical analysis of the manufacturing process are conducted. The results are discussed and compared to literature results. In case of the load stress analysis, the results agree well with findings reported in literature and extend the current state of knowledge for B500B rebars with small diameters. In case of the thermo-mechanical analysis, compressive residual stresses at the rebar surface between two ribs and tensile residual stresses in the longitudinal direction at the tip of the ribs can be reported.

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Basdeki, Maria, e Charis Apostolopoulos. "Mechanical Behavior Evaluation of Tempcore and Hybrid Reinforcing Steel Bars via a Proposed Fatigue Damage Index in Long Terms". Metals 11, n. 5 (19 maggio 2021): 834. http://dx.doi.org/10.3390/met11050834.

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As it is widely known, corrosion constitutes a major deterioration factor for reinforced concrete structures which are located in coastal areas. This phenomenon, combined with repeated loads and, especially, intense seismic events, negatively affect their useful service life. It is well known that the microstructure of steel reinforcing bars has a significant impact either on their corrosion resistance or on their fatigue life. In the present manuscript, an effort has been made to study the effect of corrosive factors on fatigue response for two types of steel reinforcement: Tempcore steel B reinforcing bars and a new-generation, dual-phase (DP) steel F reinforcement. The findings of this experimental study showed that DP steel reinforcement’s rate of degradation due to corrosion seemed apparently lighter than Tempcore B with respect to its capacity to bear repeated loads to a satisfactory degree after corrosion. For this purpose, based on a quality material index that characterizes the mechanical performance of materials, an extended damage material indicator for fatigue conditions is similarly proposed for evaluating and classifying these two types of rebars in terms of material quality and durability. The outcomes of this investigation demonstrated the feasibility of fatigue damage indicators in the production cycle as well as at different exposure times, once corrosion phenomena had left their mark in steel reinforcement.

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Rodríguez, C., E. Real, F. J. Belzunce, A. F. Canteli e M. L. Aenlle. "Fatigue behaviour of hot rolled reinforcing bars of austenitic and duplex stainless steels". Materials Science and Technology 23, n. 2 (febbraio 2007): 145–50. http://dx.doi.org/10.1179/174328407x154338.

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27

Tripathi, Mayank, Rajesh P. Dhakal, Farhad Dashti e Leonardo M. Massone. "Low-cycle fatigue behaviour of reinforcing bars including the effect of inelastic buckling". Construction and Building Materials 190 (novembre 2018): 1226–35. http://dx.doi.org/10.1016/j.conbuildmat.2018.09.192.

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Apostolopoulos, Ch Alk. "Mechanical behavior of corroded reinforcing steel bars S500s tempcore under low cycle fatigue". Construction and Building Materials 21, n. 7 (luglio 2007): 1447–56. http://dx.doi.org/10.1016/j.conbuildmat.2006.07.008.

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Li, Pengfei, Ni Tan e Chengzhi Wang. "Nonlinear Bond Model for the Dowel Action considering the Fatigue Damage Effect". Advances in Materials Science and Engineering 2018 (20 giugno 2018): 1–11. http://dx.doi.org/10.1155/2018/9690202.

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Abstract (sommario):

To investigate the mechanical properties of dowel action under fatigue loads, 3 reinforced concrete specimens with different bar diameters (12 mm, 20 mm, and 25 mm) were subjected to the fatigue loading and were designed to investigate the attenuation character of dowel action and the fatigue failure modes. The load transfer mechanism of the bond was analyzed based on the 3D relative motions between reinforcing bars and subgrade concrete. Fatigue damage effects were considered in the model. A deterioration coefficient based on the deformation path was defined to represent the accumulation of fatigue damage. Verification of the model was conducted by comparing the analysis results with experimental data obtained in this study and from the literature, and satisfactory agreement was obtained.

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HAWILEH, R. A., J. A. ABDALLA, F. OUDAH e K. ABDELRAHMAN. "Low-cycle fatigue life behaviour of BS 460B and BS B500B steel reinforcing bars". Fatigue & Fracture of Engineering Materials & Structures 33, n. 7 (15 aprile 2010): 397–407. http://dx.doi.org/10.1111/j.1460-2695.2010.01452.x.

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31

Bar, H. N., S. Sivaprasad, N. Narasaiah, Surajit K. Paul, B. N. Sen e Sanjay Chandra. "Low Cycle and Ratchetting Fatigue Behavior of High UTS/YS Ratio Reinforcing Steel Bars". Journal of Materials Engineering and Performance 22, n. 6 (25 gennaio 2013): 1701–7. http://dx.doi.org/10.1007/s11665-013-0470-x.

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32

Xu, Li Hua, Hao Zeng, Feng Xu e Wen Ke Qin. "Static and Fatigue Experimental Research on Reinforced Concrete Beams Strengthened with Pre-Stress CFRP Rods". Advanced Materials Research 368-373 (ottobre 2011): 2001–5. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.2001.

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Abstract (sommario):

In this paper, a total of six reinforced concrete beams including four beams strengthened with externally prestressed CFRP rods and two unstrengthened beams have been tested under monotonic and cylic loads in order to investigate the influence of a novel technique on the flexural static and fatigue behavior of the specimens. The experimental results show that the static and fatigue performance of strengthened members have been improved in terms of that the flexural capacity is greatly enhanced, the fatigue life is increased and the stress range of the internally tensile reinforcing bars is decreased as compared with the unstrengthened ones. It indicates that the developed technique can enhance the flexural capacity as well as improve the fatigue performance of RC members.

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Luo, Yun Rong, Tao Zeng e Lei Fu. "Investigation on the Influence of Fatigue Damage on the Mechanics Property of Anti-Seismic Steel HRB400E Reinforcing Steel Bars". Applied Mechanics and Materials 368-370 (agosto 2013): 1678–82. http://dx.doi.org/10.4028/www.scientific.net/amm.368-370.1678.

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Low cycle fatigue (LCF) experiments on anti-seismic steel HRB400E reinforcing steel bars under constant total strain (0.6%) control were conducted on a MTS 809 servo-hydraulic material testing machine. The specimens were then subjected to quasi-static tension until they ruptures on the machine. The mechanical properties such as cyclic stress-strain behaviour, quasi-static strength, and quasi-static ductility of the material at various levels of fatigue damage were investigated .The test results indicate that when compared to its virgin state, in a certain cycles (about 80% fatigue life) the cycle-dependent behaviors of the material can cause a slight change in the strength and ductility, and the ductility of the steel has an opposite trend to the strength. However, a significant decrease occurs to both the strength and the ductility as the cyclic cycles exceeds about 80% fatigue life.

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Apostolopoulos, Ch Alk, e V. P. Pasialis. "Effects of Corrosion and Ribs on Low Cycle Fatigue Behavior of Reinforcing Steel Bars S400". Journal of Materials Engineering and Performance 19, n. 3 (2 luglio 2009): 385–94. http://dx.doi.org/10.1007/s11665-009-9502-y.

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Fernandez, Ignasi, Jesús Miguel Bairán e Antonio R. Marí. "Corrosion effects on the mechanical properties of reinforcing steel bars. Fatigue and σ–ε behavior". Construction and Building Materials 101 (dicembre 2015): 772–83. http://dx.doi.org/10.1016/j.conbuildmat.2015.10.139.

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36

Chen, Jie, Bo Diao, Jingjing He, Sen Pang e Xuefei Guan. "Equivalent surface defect model for fatigue life prediction of steel reinforcing bars with pitting corrosion". International Journal of Fatigue 110 (maggio 2018): 153–61. http://dx.doi.org/10.1016/j.ijfatigue.2018.01.019.

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37

Kashani, Mohammad M., Laura N. Lowes, Adam J. Crewe e Nicholas A. Alexander. "Phenomenological hysteretic model for corroded reinforcing bars including inelastic buckling and low-cycle fatigue degradation". Computers & Structures 156 (agosto 2015): 58–71. http://dx.doi.org/10.1016/j.compstruc.2015.04.005.

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38

Vasco, Marina C., Panagiota Polydoropoulou, Apostolos N. Chamos e Spiros G. Pantelakis. "Effect of corrosion and sandblasting on the high cycle fatigue behavior of reinforcing B500C steel bars". Frattura ed Integrità Strutturale 11, n. 42 (29 settembre 2017): 9–22. http://dx.doi.org/10.3221/igf-esis.42.02.

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39

Aldabagh, Saif, e M. Shahria Alam. "Low-cycle fatigue performance of high-strength steel reinforcing bars considering the effect of inelastic buckling". Engineering Structures 235 (maggio 2021): 112114. http://dx.doi.org/10.1016/j.engstruct.2021.112114.

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40

Abdalla, Jamal A., e Rami Hawileh. "Modeling and simulation of low-cycle fatigue life of steel reinforcing bars using artificial neural network". Journal of the Franklin Institute 348, n. 7 (settembre 2011): 1393–403. http://dx.doi.org/10.1016/j.jfranklin.2010.04.005.

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41

El-Ragaby, Amr, Ehab El-Salakawy e Brahim Benmokrane. "Fatigue analysis of concrete bridge deck slabs reinforced with E-glass/vinyl ester FRP reinforcing bars". Composites Part B: Engineering 38, n. 5-6 (luglio 2007): 703–11. http://dx.doi.org/10.1016/j.compositesb.2006.07.012.

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42

Girgin, Sadik Can, Mohammadreza Moharrami e Ioannis Koutromanos. "Nonlinear Beam-Based Modeling of RC Columns Including the Effect of Reinforcing-Bar Buckling and Rupture". Earthquake Spectra 34, n. 3 (agosto 2018): 1289–309. http://dx.doi.org/10.1193/063017eqs136m.

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Abstract (sommario):

This study presents a beam-based modeling approach for the analysis of reinforced concrete (RC) frame members under cyclic loads that can capture the effect of inelastic buckling and rupture of reinforcing steel bars. The approach uses force-based elements with a fiber-section model and a corotational formulation to account for the geometric nonlinearity effect on the response of columns. A recently proposed phenomenological uniaxial model for steel reinforcement, capable of simulating inelastic buckling and rupture due to low-cycle fatigue, is used for the reinforcing steel fibers. Numerical simulation models also account for strain penetration effects in the analyses. The modeling approach is validated with the results of experimental tests on RC columns under cyclic loads. A sensitivity study is also pursued to elucidate the impact of bar buckling and strain penetration on the analytical results.

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43

Hawileh, R., A. Rahman e H. Tabatabai. "Evaluation of the Low-Cycle Fatigue Life in ASTM A706 and A615 Grade 60 Steel Reinforcing Bars". Journal of Materials in Civil Engineering 22, n. 1 (gennaio 2010): 65–76. http://dx.doi.org/10.1061/(asce)0899-1561(2010)22:1(65).

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44

Li, Shibin, Hongwei Tang, Qiang Gui e Zhongguo John Ma. "Corrigendum to “Fatigue behavior of naturally corroded plain reinforcing bars” [Constr. Build. Mater. 152 (2017) 933–942]". Construction and Building Materials 155 (novembre 2017): 1256–57. http://dx.doi.org/10.1016/j.conbuildmat.2017.09.011.

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45

Kashani, Mohammad M., Peyman Alagheband, Rafid Khan e Sean Davis. "Impact of corrosion on low-cycle fatigue degradation of reinforcing bars with the effect of inelastic buckling". International Journal of Fatigue 77 (agosto 2015): 174–85. http://dx.doi.org/10.1016/j.ijfatigue.2015.03.013.

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46

Pan, Yuan, Guo Hua Xing, Guo Fu e Jian Ling Hou. "Cumulative Seismic Damage of Reinforced Concrete Columns: Benchmark and Low-Cycle Fatigue Tests". Applied Mechanics and Materials 52-54 (marzo 2011): 734–39. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.734.

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Abstract (sommario):

Under seismic actions, reinforced concrete columns are generally damaged by a combination of repeated stress reversals and high stress excursions. An experimental study was undertaken to investigate cumulative damage in reinforced concrete rectangular columns subjected to repeated cyclic loadings. Fourteen identical half-scale concrete columns were fabricated and tested to failure. This paper summarizes the results of Phase I testing that consisted of benchmark tests to establish the monotonic force-deformation envelope, and constant amplitude tests to determine the low-cycle fatigue characteristics of typical flexural columns. A companion paper will present the results of variable amplitude tests to develop an analytical model of cumulative damage for rectangular reinforced concrete columns. Test observations indicate two potential failure modes: low cycle fatigue of the longitudinal reinforcing bars; and confinement failure due to rupture of the confining hoops. The former failure mode is associated with relatively large displacement amplitudes, while the latter is associated with a larger number of smaller amplitude cycles. A fatigue life expression is developed that can be used in damage-based seismic design of rectangular, flexural concrete columns.

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47

He, Shiqin, Jiaxing Zhao, Chunyue Wang e Hui Wang. "Experimental Study on the Degradation of Bonding Behavior between Reinforcing Bars and Concrete after Corrosion and Fatigue Damage". Structural Durability & Health Monitoring 16, n. 3 (2022): 195–212. http://dx.doi.org/10.32604/sdhm.2022.08886.

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48

Apostolopoulos, Ch Alk. "The effect of ribs on the mechanical behavior of corroded reinforcing steel bars S500s under low-cycle fatigue". Materials and Structures 41, n. 5 (12 settembre 2007): 991–99. http://dx.doi.org/10.1617/s11527-007-9300-7.

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49

Ju, Minkwan, e Hongseob Oh. "Experimental Assessment on the Flexural Bonding Performance of Concrete Beam with GFRP Reinforcing Bar under Repeated Loading". International Journal of Polymer Science 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/367528.

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Abstract (sommario):

This study intends to investigate the flexural bond performance of glass fiber-reinforced polymer (GFRP) reinforcing bar under repeated loading. The flexural bond tests reinforced with GFRP reinforcing bars were carried out according to the BS EN 12269-1 (2000) specification. The bond test consisted of three loading schemes: static, monotonic, and variable-amplitude loading to simulate ambient loading conditions. The empirical bond length based on the static test was 225 mm, whereas it was 317 mm according to ACI 440 1R-03. Each bond stress on the rib is released and bonding force is enhanced as the bond length is increased. Appropriate level of bond length may be recommended with this energy-based analysis. For the monotonic loading test, the bond strengths at pullout failure after 2,000,000 cycles were 10.4 MPa and 6.5 MPa, respectively: 63–70% of the values from the static loading test. The variable loading test indicated that the linear cumulative damage theory on GFRP bonding may not be appropriate for estimating the fatigue limit when subjected to variable-amplitude loading.

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50

Sepulveda, Barbara Daniela Giorgini, Phillip Visintin e Deric John Oehlers. "Fatigue bond-slip properties of steel reinforcing bars embedded in UHPFRC: Extraction and development of an accumulated damage law". Case Studies in Construction Materials 17 (dicembre 2022): e01370. http://dx.doi.org/10.1016/j.cscm.2022.e01370.

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