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Journal articles on the topic 'Steel reinforced concrete'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 May 2022

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1

Pei, Weichang, Daiyu Wang, Xuan Wang, and Zhenyu Wang. "Axial monotonic and cyclic compressive behavior of square GFRP tube–confined steel-reinforced concrete composite columns." Advances in Structural Engineering 24, no. 1 (July 20, 2020): 25–41. http://dx.doi.org/10.1177/1369433220934557.

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Fiber-reinforced polymer tube–confined steel fiber–reinforced concrete column is a novel composite column proposed recently, which consists of a traditional steel-reinforced concrete column and an external glass fiber–reinforced plastic tube for lateral confinement. In order to investigate the axial compression behavior of steel fiber–reinforced concrete columns, a total of 16 square specimens were fabricated and tested under axial monotonic and cyclic compressive loading. Three different configurations of inner shaped steels, including cross-shaped, box-shaped with wielding, and box-shaped without wielding were considered. Two thicknesses of glass fiber–reinforced concrete tubes were also considered as the main experimental parameters. On the basis of test results, a thorough analysis of the failure process based on strain analysis was discussed. The test results showed that steel fiber–reinforced concrete columns exhibited higher ductility and load capacity compared with fiber-reinforced plastic–confined plain concrete columns. Two quantitative indexes were proposed to measure the confinement of steel fiber–reinforced concretes. The axial cyclic mechanical behaviors were discussed through comparative analysis with monotonic behaviors. The remnant strains and modulus of the cyclic behaviors were also discussed.
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2

Alkjk, Saeed, Rafee Jabra, and Salem Alkhater. "Preparation and characterization of glass fibers – polymers (epoxy) bars (GFRP) reinforced concrete for structural applications." Selected Scientific Papers - Journal of Civil Engineering 11, no. 1 (June 1, 2016): 15–22. http://dx.doi.org/10.1515/sspjce-2016-0002.

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Abstract The paper presents some of the results from a large experimental program undertaken at the Department of Civil Engineering of Damascus University. The project aims to study the ability to reinforce and strengthen the concrete by bars from Epoxy polymer reinforced with glass fibers (GFRP) and compared with reinforce concrete by steel bars in terms of mechanical properties. Five diameters of GFRP bars, and steel bars (4mm, 6mm, 8mm, 10mm, 12mm) tested on tensile strength tests. The test shown that GFRP bars need tensile strength more than steel bars. The concrete beams measuring (15cm wide × 15cm deep × and 70cm long) reinforced by GFRP with 0.5 vol.% ratio, then the concrete beams reinforced by steel with 0.89 vol.% ratio. The concrete beams tested on deflection test. The test shown that beams which reinforced by GFRP has higher deflection resistance, than beams which reinforced by steel. Which give more advantage to reinforced concrete by GFRP.
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3

Ristic, Nenad, Dusan Grdic, Jelena Bijeljic, Zoran Grdic, and Gordana Toplicic-Curcic. "Properties of steel-polypropilene hybrid fibers reinforced concrete." Facta universitatis - series: Architecture and Civil Engineering 19, no. 3 (2021): 235–44. http://dx.doi.org/10.2298/fuace211202018r.

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This paper present the results of mechanical properties of hybrid reinforced concrete made by adding polypropylene and steel fibers into concrete mixture. For the testing purposes were used steel fibers with hooked ends and monofilament polypropylene fibers. The total of 5 batches of concrete were made: concrete with addition of steel fibers, polypropylene fibers and their combination in amount of 0,5 % of the concrete volume. The test results show that concretes made by adding of 0.4% steel and 0.1% polypropylene fibers have better performance compared to other concretes.
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4

Sinha, Dr Deepa, Prof C. B. Mishra Prof. C.B. Mishra, and Ravindra V. Solanki. "Comparison of Normal Concrete Pavement with Steel Fiber Reinforced Concrete Pavement." Indian Journal of Applied Research 4, no. 8 (October 1, 2011): 233–35. http://dx.doi.org/10.15373/2249555x/august2014/60.

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5

Li, Bei Xing, Ai Jun Guan, and Ming Kai Zhou. "Preparation and Performances of Self-Compacting Concrete Used in the Joint Section between Steel and Concrete Box Girders of Edong Yangtze River Highway Bridge." Advanced Materials Research 168-170 (December 2010): 334–40. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.334.

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The joint section between steel and concrete box girders is the key localization of the super-long span hybrid girder cable-stayed bridge in the Edong Yangtze River, a high strength self-compacting concrete (SCC) was required to use in the joint section. This paper systematically investigated the performances of three types of C55 grade self-compacting concretes (SCCs), such as plain SCC, micro-expansion and polypropylene fiber reinforced SCC and steel fiber reinforced SCC. The results indicated that the steel fiber reinforced SCC had the best workability and mechanical properties. The flexural toughness of the steel fiber reinforced SCC was much better than that of the other two types of concretes. The addition of steel fiber, or polypropylene fiber and expansive agent improved the crack resistance of SCC, and the micro-expansion and polypropylene fiber SCC reinforced had better crack resistance than steel fiber reinforced SCC. The three types of SCCs have very high chloride penetration resistance and advanced freezing and thawing resistance. Moreover, the test achievement of concrete casting technology for the full-scale model of steel girder chambers in the joint section is introduced. The steel fiber reinforced SCC was preferred to be used in the steel-concrete joint section.
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6

Snytko, Valerii. "Calculation method steel reinforced concrete continuous bridge spans with two reinforced concrete slabs on the effect of concrete shrinkage." Automobile Roads and Road Construction, no. 110 (2021): 84–89. http://dx.doi.org/10.33744/0365-8171-2021-110-084-089.

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The article is considered calculation method steel reinforced concrete continuous bridge spans with two reinforced concrete slabs on the effect of concrete shrinkage. For long-term processes that must be considered when calculating the span structures of bridges, besides creep, concrete shrinkage applies. Object of study: composite steel and concrete span beam bridge with two reinforced concrete slabs. Purpose: to develop a calculation method the cross section steel reinforced concrete bridges with two reinforced concrete slabs on the effect of concrete shrinkage considering concrete creep. Continuous spans of steel reinforced concrete bridges with two reinforced concrete slabs over intermediate supports much more economically, in terms of metal consumption, compared to steel reinforced concrete bridges with one concrete slab. Cross section of a reinforced reinforced concrete beam consists of a steel part that combined with two reinforced concrete slabs. The article presents the results of the calculation of continuous steel-concrete superstructure of a road bridge with two reinforced concrete slabs by the above method.
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7

Kumar, Rakesh. "Steel Fiber Reinforced Concrete." International Journal for Research in Applied Science and Engineering Technology 7, no. 5 (May 31, 2019): 2456–58. http://dx.doi.org/10.22214/ijraset.2019.5407.

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8

Ghaffar, Abdul, Amit S. Chavhan, and Dr R. S. Tatwawadi. "Steel Fibre Reinforced Concrete." International Journal of Engineering Trends and Technology 9, no. 15 (March 25, 2014): 791–97. http://dx.doi.org/10.14445/22315381/ijett-v9p349.

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9

Wang, Xian Dong, Chang Zhang, Zhen Huang, and Guo Wei Chen. "Impact Experimental Research on Hybrid Bamboo Fiber and Steel Fiber Reinforced Concrete." Applied Mechanics and Materials 357-360 (August 2013): 1049–52. http://dx.doi.org/10.4028/www.scientific.net/amm.357-360.1049.

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This paper studied experimentally the impact mechanical properties of bamboo fiber and hybrid steel fiber reinforced concrete. Steel fiber is already used in construction widely, but it is expensive in cost. As a kind of green building material, bamboo fiber can be used in the infrastructures together with concrete to improve the concretes mechanical properties. In order to investigate the impact mechanical properties of concrete reinforced with bamboo fiber and steel fiber, a series of concrete specimens reinforced with bamboo fiber, steel fiber or both steel fiber and bamboo fiber are investigated with self-designed impact device. The impact resistance abilities are tested and compared.
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10

Liu, Chuan Xiao, Zhi Hao Liu, Long Wang, Hong Ye Tian, and Xiu Li Zhang. "Index Analysis for Specimens of Reinforced Concretes with Mechanical Parameters." Advanced Materials Research 368-373 (October 2011): 33–37. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.33.

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To study mechanical characteristics of general reinforced concrete in engineering, specimens of reinforced concrete with different mass ratios and specimens of fiber reinforced concrete with different distributing modes of steel fibers or mixed modes of fiberglass are produced. Testing results from these specimens state that recommended mass ratio is 1:4.29:0.74 of cement, sand to water for reinforced concrete, and mass ratio of mixed AR fiberglass is 4‰ or distributing mode of steel fibers is vertical 5 roots evenly for fiber reinforced concretes will have excellent mechanical properties. Analyzing mechanical indexes influencing characteristics of reinforced concretes, uniaxial compressive strength and ultimate strain are primary indexes, elastic modulus is an assistant index, and Poisson ratio and residual strength are both only referenced indexes.
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11

Yun, Yeon Jun, Kyung Lim Ahn, Won Gyun Lim, and Hyun Do Yun. "Effects of Steel Fiber Volume Fraction on Compressive and Flexural Behaviors of Alkali-Activated Slag (AAS) Concrete." Applied Mechanics and Materials 525 (February 2014): 469–72. http://dx.doi.org/10.4028/www.scientific.net/amm.525.469.

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This paper describes the experimental results on compressive and flexural behavior of alkali-activated slag (AAS) concrete reinforced with hooked end steel fiber. Two different fiber volume fractions of 0.5 and 1.0% were used for AAS concrete and Ordinary Portland cement (OPC) concretes were also mixed for comparison. Test results indicated that compressive and flexural performance of AAS concretes with water-to-binder (W/B) ratio of 0.55 are equivalent to those of OPC concrete. The addition of steel fiber to AAS concrete improves more compressive and flexural performance than those of steel fiber reinforced concrete.
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12

Bertolini, L., M. Gastaldi, Τ. Pastore, and M. P. Pedeferri. "Korrosion rostfreier Stähle in chloridhaltigem und karbonatisiertem Beton / Corrosion Behaviour of Stainless Steels in Chloride Contaminated and Carbonated Concrete." Restoration of Buildings and Monuments 6, no. 3 (June 1, 2000): 273–92. http://dx.doi.org/10.1515/rbm-2000-5476.

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Abstract The paper deals with the corrosion resistance of different stainless steels in chloride contaminated and carbonated concrete. Stainless steel reinforcement has a higher corrosion resistance as compared to the normal carbon steel reinforcement; stainless steels can, however, be subject to localized corrosion if the chloride content in the concrete exceeds a certain critical value. This critical value depends on the pH value of the concrete (i.e. carbonated or alkaline concrete), the temperature, the corrosion potential (function of environmental conditions), and the composition and microstructure of the stainless steel. Furthermore, in the rehabilitation of corroding reinforced concrete structures, stainless steel is often used in structures reinforced with normal carbon steel and galvanic coupling can occur. The results of measurements of free corrosion potential, corrosion rate and macrocouple current in reinforced concrete specimens are reported as a function of chloride concentration and humidity. The consequence of coupling with carbon steel reinforcement is also considered.
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13

Bansal, Neeru, Naveen Kwatra, and Varinder S. Kanwar. "Effect of Steel Fibers on Reinforced Concrete Opening Corners." Journal on Today's Ideas - Tomorrow's Technologies 1, no. 2 (December 2, 2013): 113–22. http://dx.doi.org/10.15415/jotitt.2013.12008.

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14

K, JAISKARUN, and SUJATHA UNNIKRISHNAN. "Experimental and Analytical Investigation on Steel Fiber Reinforced Concrete." International Journal of Earth Sciences and Engineering 10, no. 01 (March 6, 2017): 17–24. http://dx.doi.org/10.21276/ijee.2017.10.0104.

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15

Djebali, Said, Youcef Bouafia, Said Larbi, and Ali Bilek. "Mechanical Behavior of Steel-Chips-Reinforced Concrete." Key Engineering Materials 592-593 (November 2013): 672–75. http://dx.doi.org/10.4028/www.scientific.net/kem.592-593.672.

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This work is a part of an industrial waste development program. It is devoted to the study of recyclability of chips resulting from the machining of steel parts as reinforcement for concrete. We are particularly interested in this study in the rheological behavior of chips reinforced fresh concrete and its mechanical behavior at young age. The evaluation of the workability indicates that the sand over gravel optimal ratios (S/G), corresponding to the composite minimum flow time, are S/G = 0.8 and S/G = 1. The study of the chips content (W) influence on the workability of the concrete shows that the flow time and the optimal ratio S/G increase with W. Mechanical characterization tests (direct tension, compression, bending and splitting) show that mechanical properties of chips reinforced concrete are comparable to those of the two selected reference concretes (concrete reinforced with conventional fibers: EUROSTEEL fibers corrugated and DRAMIX fibers). Chips provide to control concrete a significant increase in strength and some ductility in the post-failure behavior of the composite. Recycling chips as reinforcement for concrete could be thus favorably considered.
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16

Shan, Liang, and Liang Zhang. "Experimental Study on Mechanical Properties of Steel and Polypropylene Fiber-Reinforced Concrete." Applied Mechanics and Materials 584-586 (July 2014): 1355–61. http://dx.doi.org/10.4028/www.scientific.net/amm.584-586.1355.

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The mechanical tests of normal concrete (NC) specimens, steel fiber reinforced concrete (SFRC) specimens and polypropylene fiber reinforced concrete (PPFRC) specimens have been carried out. Fiber-reinforced concretes containing different volume fraction and aspect ratio of steel and polypropylene fibers were compared in terms of compressive, splitting tensile, ultimate tensile properties. Test results indicate that the mechanical properties of NC can be improved by addition of steel fibers and can be enhanced with the increase of fiber content. However, polypropylene fiber may cause opposite effect, if volume fraction too high.
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17

Krzywoń, Rafał. "Steel-Reinforced Polymers and Steel-Reinforced Composite Mortars for Structural Applications—An Overview." Journal of Composites Science 4, no. 3 (September 20, 2020): 142. http://dx.doi.org/10.3390/jcs4030142.

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Bonding of external reinforcement is currently the simplest, fastest, and most popular method of strengthening concrete and masonry structures. Glass and carbon organic fibers are the dominant materials used, but alternatives also include high-strength steel wires. The mechanical properties of such steel are comparable to those of carbon fiber. Due to their good compatibility with mortars, steel wires are particularly well suited to the revitalization of historic buildings. The manuscript provides an overview of research and experience in the use of steel-reinforced polymers (SRPs) and steel-reinforced composite mortars (SRCMs, also called steel-reinforced grout (SRG)) for structural strengthening. The examples described are for concrete beams, slabs and columns, walls, and masonry arches. The results of laboratory tests are discussed. The summary presents the advantages and disadvantages of composites based on ultra-high-strength steels compared with more popular carbon fiber composites.
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18

Feng, Zhongju, Haibo Hu, Yunxiu Dong, Fuchun Wang, Minghui Jia, Yawan Zhao, and Jingbin He. "Effect of Steel Casing on Vertical Bearing Characteristics of Steel Tube-Reinforced Concrete Piles in Loess Area." Applied Sciences 9, no. 14 (July 18, 2019): 2874. http://dx.doi.org/10.3390/app9142874.

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This study aims at investigating the effect of steel casing on vertical bearing characteristics of steel tube-reinforced concrete piles in loess area by centrifugal model test. Five piles were selected, one of them was a conventional reinforced concrete pile which was 35 cm in length and 2.5 cm in diameter as a contrast pile, and the length of steel casing for the remaining four steel tube-reinforced concrete piles was 8 cm, 12 cm, 16 cm, and 20 cm respectively. The results show that the axial force, unit skin friction, tip resistance, and shaft resistance of steel tube-reinforced concrete piles with different steel casing lengths were different from conventional reinforced concrete pile. Additionally, the ultimate bearing capacity of steel tube-reinforced concrete piles was compared with a conventional reinforced concrete pile. Moreover, advantages of steel casing in pile foundation engineering were summarized. The results of this study can provide reference for vertical bearing characteristics of steel tube-reinforced concrete piles in loess area.
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19

Lie, T. T., and V. K. R. Kodur. "Thermal and mechanical properties of steel-fibre-reinforced concrete at elevated temperatures." Canadian Journal of Civil Engineering 23, no. 2 (April 1, 1996): 511–17. http://dx.doi.org/10.1139/l96-055.

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For use in fire resistance calculations, the relevant thermal and mechanical properties of steel-fibre-reinforced concrete at elevated temperatures were determined. These properties included the thermal conductivity, specific heat, thermal expansion, and mass loss, as well as the strength and deformation properties of steel-fibre-reinforced siliceous and carbonate aggregate concretes. The thermal properties are presented in equations that express the values of these properties as a function of temperature in the temperature range between 0 °C and 1000 °C. The mechanical properties are given in the form of stress–strain relationships for the concretes at elevated temperatures. The results indicate that the steel fibres have little influence on the thermal properties of the concretes. The influence on the mechanical properties, however, is relatively greater than the influence on the thermal properties and is expected to be beneficial to the fire resistance of structural elements constructed of fibre-reinforced concrete. Key words: steel fibre, reinforced concrete, thermal properties, mechanical properties, fire resistance.
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20

Yu, Xiao Qing, Mao Lin, Guang Long Geng, Li Jia, and Na Wei. "Steel Fiber Reinforced Concrete Pavement Maintenance." Applied Mechanics and Materials 252 (December 2012): 276–79. http://dx.doi.org/10.4028/www.scientific.net/amm.252.276.

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In this paper, a cement concrete pavement, steel fiber reinforced concrete with than the experimental study, the analysis of steel fiber reinforced concrete pavement engineering, test results show that the steel fibers in the concrete evenly distributed, with cement mortarbetter integration, better crack resistance of concrete, and shrinkage of steel fiber reinforced concrete is much smaller than the specification requirements, and so has a great advantage for pavement repair.
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21

Lee, Ming-Gin, Wei-Chien Wang, Yung-Chih Wang, Yi-Cheng Hsieh, and Yung-Chih Lin. "Mechanical Properties of High-Strength Pervious Concrete with Steel Fiber or Glass Fiber." Buildings 12, no. 5 (May 7, 2022): 620. http://dx.doi.org/10.3390/buildings12050620.

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Pervious concrete (also called porous concrete) is one of the most promising sustainable and green building materials today. This study examined high-strength pervious concrete and ordinary-strength pervious concrete reinforced with steel fiber or glass fiber. A total of fifteen mixtures of normal- and high-strength pervious concretes with steel fiber or glass fiber were used. The goal of high-strength pervious concrete is that the 28-day compressive strength be above 42 MPa and the porosity be as close to 15% as possible to achieve technical specifications. Both normal- and high-strength pervious concretes reinforced with steel fiber (1%, 2%) or glass fiber (0.25%, 0.5%) were investigated in water permeability, porosity, compressive strength, flexural strength, elastic modulus, and toughness tests. The test results show that in both high-strength pervious concrete and ordinary pervious concrete with steel fibers added, the porosity and permeability coefficient are increased compared with the control group. The coefficient of permeability for high-strength, fiber-reinforced pervious concretes with two aggregate sizes meets the requirements of the ACI specification for structural concrete. In addition, the high-strength pervious concrete specimen H1-S2 (2% steel fiber) has the highest compressive strength of 52.8 MPa at the age of 28 days. The flexural strength of pervious concrete also increases with age. However, the flexural strength of fiber-reinforced pervious concrete did not follow this trend due to the large variation in the quality control of different fiber mixtures. However, both steel fiber and glass fiber have a certain degree of improvement in the flexural toughness, and the effect is better with steel fiber. After the flexural strength reaches the peak value, there is still about 30% of the bearing capacity, and it gradually decreases until it is completely destroyed.
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22

Aslani, Farhad, Yinong Liu, and Yu Wang. "Flexural and toughness properties of NiTi shape memory alloy, polypropylene and steel fibres in self-compacting concrete." Journal of Intelligent Material Systems and Structures 31, no. 1 (October 5, 2019): 3–16. http://dx.doi.org/10.1177/1045389x19880613.

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Self-compacting concrete presents good workability to fill complicated forms without mechanical vibrations. This concrete is often reinforced with fibres to improve the strength and toughness. This study investigated the use of nickel -titanium (NiTi) shape memory alloy fibres in comparison with polypropylene and steel fibres in self-compacting concrete. The performances of the fresh fibre–reinforced self-compacting concrete are explored by slump flow and J-ring experiments. Meanwhile, the static and cyclic flexural tests are conducted to estimate the bending resistance strength performance, residual deformation and recovering capacity of shape memory alloy, polypropylene and steel fibre–reinforced self-compacting concrete. Moreover, the flexural toughness of the shape memory alloy, polypropylene and steel fibre–reinforced self-compacting concrete is calculated using four different codes. The shape memory alloy fibre–reinforced self-compacting concrete with 0.75% volume fraction presents the largest flexural strength, re-centering ability and toughness in comparison with polypropylene and steel fibre–reinforced self-compacting concretes. The experimental results demonstrated the beneficial influence of the shape memory and superelastic properties of NiTi in postponing initial crack formation and restricting the crack widths.
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23

Zhang, Guoxue, Yingfeng Wang, Shixiang Xu, Juan Lu, and Yangyang Zhou. "Experimental on Impact Mechanical Behavior of the Carbon Fibre Reinforced Plastic-Reinforced Stainless Steel Reinforced Concrete Piers." Science of Advanced Materials 12, no. 5 (May 1, 2020): 769–77. http://dx.doi.org/10.1166/sam.2020.3734.

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To study the impact resistance of the stainless steel reinforced concrete after reinforced with CFRP (Carbon Fibre Reinforced Plastic), the multifunction ultra-high heavy drop hammer test system was adopted to conduct multiple horizontal impact test research on three stainless steel reinforced concrete piers before and after they are reinforced. The test results showed that with equal impact energy, the maximum impact force of the stainless steel reinforced concrete piers was larger than that of the stainless steel reinforced concrete piers that were reinforced with CFRP, while after the concrete piers were reinforced, the peak displacement of the piers was obviously smaller than that before they were reinforced and the residual deformation also became smaller, which improved the flexural rigidity of the section. And the local anti-damage capacity can be improved so as to lengthen the life of structures by reinforcing the stainless steel reinforced concrete pier with carbon fiber.
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24

Liang, Jiong Feng, Ze Ping Yang, and Lan Lan Yan. "Calculation of Flexural Capacity of Steel Reinforced Concrete Beams Strengthened with FRP." Advanced Materials Research 79-82 (August 2009): 1141–44. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.1141.

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Based on earlier theoretical works on RC beams ,the mechanical properties of steel reinforced concrete beams strengthened with FRP(fiber reinforce polymer) are further investigated theoretically including theirs failure mechanism and loadability. According to the design method of reinforced concrete beam strengthened with FRP, steel reinforced concrete beam strengthened with FRP mainly can have three kinds of destruction patterns: the first case is the tensile steel yield, the tensile shaped steel yield, the FRP are put off, the compressive zone’s concrete has not crushed; the second case is the tensile steel yield, the tensile shaped steel yield, the FRP are put off; the compressive zone’s concrete has crushed; the last case is the tensile steel yield, the tensile shaped steel yield, the FRP are not put off, the compressive zone’s concrete has crushed. The second case is discussed in this paper.Based on the different position of middle axle and steel, steel concrete beams strengthened with FRP include: middle axle through the steel web, and not through the steel and just in steel compression flange . Aim at these three kind of situations, the stress are analysed. According to the stress patterns of steel reinforced concrete beams strengthened with FRP and different position between neutral axis and steel, the discriminant formula of the boundary destroys and the formula of cross-section flexural capacity calculation are put forward by using limit equilibrium theory.The formula is expressed clearly, simple and easy to use.The depth of compressive region is given in view of different failure types.
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25

Liu, Xue Feng, Qing Xin Ren, and Lian Guang Jia. "Temperature Field Analysis of Concrete Filled Steel Tube Reinforced Concrete Columns in Fire." Applied Mechanics and Materials 644-650 (September 2014): 5019–22. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.5019.

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In this paper, temperature field analysis of concrete filled steel tube reinforced concrete columns in fire has been carried on. A finite element model for concrete filled steel tube reinforced concrete columns in fire is developed by ABAQUS. The cross-sectional temperature field distribution regularity of concrete filled steel tube reinforced concrete columns in fire has been obtained. Parameter analysis such as fire duration time and steel ratio on the column section temperature field is conducted, and this provide the reference for the further analysis of concrete filled steel tube reinforced concrete columns.
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26

Cao, Xiu Li, Gang Ye, and Hai Gang Gou. "Deflections of Steel Reinforced Concrete Beams Considering the Bond-Slip Effects." Applied Mechanics and Materials 226-228 (November 2012): 1128–31. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.1128.

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Bond-slip performance between section steel and concrete has influence on deformation of steel reinforced concrete beams based on results of experimental studies. Current standards on steel reinforced concrete structures do not involve bond-slip effects when calculating the deflection of steel reinforced concrete beams and this is not valid exactly. This paper describes a new method of deflection calculation for steel reinforced concrete beams, which considering the bond-slip effects on deformation. Deflection of steel reinforced concrete beams are divided into two parts: deflection of steel reinforced concrete beams under loads considering the fully bond between steel and concrete, and the additional deflection caused by the bond-slip. The sum of the two parts is the total deflection. Results show that the proposed method in this paper fits with experimental results.
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27

Wang, Yu Zhuo, and Chuang Guo Fu. "Calculation of Ultimate Bearing Capacity of Prestressed Steel Reinforced Concrete Structure under Fire." Advanced Materials Research 250-253 (May 2011): 2857–60. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.2857.

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Prestressed steel reinforced concrete structure, compared with other concrete structure has its unique advantages. So it is mainly used in large span and conversion layers. With the popularization of this structure,more attention should be payed on fire resistance performance. On the basis of reasonable assume,two steps model is used as concrete high strength calculation model. Simplified intensity decreased curve is used as rebar,steel and prestressed. Two ultimate bearing capacity formulas of prestressed steel reinforced concrete beam are established. One is for the beam whose tensile area is under fire, the other is for the beam whose compression area is under fire. Prestressed steel reinforced concrete structure has both prestressed concrete structure’s advantages and steel reinforced concrete structure ’s advantage. Steel reinforced concrete is used to improve the bearing capacity of the structure. Prestressed steel is used to improve the ultimate state of structure’s performance during normal use. Thereby structure’s performance is better to play. There are many similarities between prestressed steel reinforced concrete structure and steel reinforced concrete structure about fire resistance performance. Because of prestressed steel reinforced concrete structure’s own characteristics, there are still many problems about fire resistance. This paper mainly presented bending terminal bearing capacity of prestressed steel reinforced concrete beam under fire. Established simplified formulae for calculation, it is meet the engineering accuracy requirement.
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28

Tavares, D. H., J. S. Giongo, and P. Paultre. "Behavior of reinforced concrete beams reinforced with GFRP bars." Revista IBRACON de Estruturas e Materiais 1, no. 3 (September 2008): 285–95. http://dx.doi.org/10.1590/s1983-41952008000300004.

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The use of fiber reinforced polymer (FRP) bars is one of the alternatives presented in recent studies to prevent the drawbacks related to the steel reinforcement in specific reinforced concrete members. In this work, six reinforced concrete beams were submitted to four point bending tests. One beam was reinforced with CA-50 steel bars and five with glass fiber reinforced polymer (GFRP) bars. The tests were carried out in the Department of Structural Engineering in São Carlos Engineering School, São Paulo University. The objective of the test program was to compare strength, reinforcement deformation, displacement, and some anchorage aspects between the GFRP-reinforced concrete beams and the steel-reinforced concrete beam. The results show that, even though four GFRP-reinforced concrete beams were designed with the same internal tension force as that with steel reinforcement, their capacity was lower than that of the steel-reinforced beam. The results also show that similar flexural capacity can be achieved for the steel- and for the GFRP-reinforced concrete beams by controlling the stiffness (reinforcement modulus of elasticity multiplied by the bar cross-sectional area - EA) and the tension force of the GFRP bars.
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29

Wang, Yun Feng, and Yao Hua Wang. "Experimental Study on the Comparison of Resisting Semi-Armour-Piercing Projectile Penetration Ability for Steel Mesh, Steel Fiber and Steel Composites." Applied Mechanics and Materials 253-255 (December 2012): 425–31. http://dx.doi.org/10.4028/www.scientific.net/amm.253-255.425.

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A new protective material-steel mesh reinforced concrete was developed under the condition of modern high-tech weapon development. The comparative tests were conducted with steel fiber reinforced and steel reinforced concrete. The enhancement characteristics of three composites were analyzed in the respects of base material, the distribution of reinforced material and its bonding. The results indicate that steel mesh reinforced concrete is the most effective composite resisting penetration.
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30

Storozhenko, Leonid, Pavlo Semko, and Olena Yefimenko. "Compressed Flexible Steel Reinforced Concrete Elements Investigation." International Journal of Engineering & Technology 7, no. 3.2 (June 20, 2018): 436. http://dx.doi.org/10.14419/ijet.v7i3.2.14567.

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Stress-strain state and compressed flexible steel-reinforced concrete elements resistance capacity are investigated in the work. The experiment program is complied and steel reinforced concrete elements calculations methods are analyzed. Experimental sample design drawings are shown. Raw materials physical and mechanical properties are determined. Steel reinforced-concrete elements experimental and research studies have been carried out. Coboundary dependences N-M for steel reinforced concrete elements construction method is proposed. Resistance capacity diagrams for steel reinforced concrete elements are constructed depending on the element height and the applied eccentricity.
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31

Nikolaev, V. B., S. E. Lisichkin, O. D. Rubin, and A. S. Lisichkin. "Steel-Reinforced Concrete Penstock Experiments." Power Technology and Engineering 50, no. 5 (January 2017): 466–72. http://dx.doi.org/10.1007/s10749-017-0734-y.

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32

Xu, Pi Yuan, Lin Lin Ren, and Ya Feng Xu. "The Antiknock Property Research of L Steel Reinforced Concrete Special-Shaped Column in the Different Thicknesses of Steel Bone in Blast Loads." Applied Mechanics and Materials 351-352 (August 2013): 654–57. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.654.

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In this paper, L steel reinforced concrete special-shaped columns are established by the finite element analysis software ABAOUS and we simulate and analyze models in blast loads. The main purpose is to study the antiknock property of L steel reinforced concrete special-shaped column in the different thicknesses of steel bone. We change the thickness of steel bone to get the time-displacement curve of L steel reinforced concrete special-shaped columns in blast loads. On the basis of the study we draw the conclusion: the antiknock property of L steel reinforced concrete special-shaped column is better than L reinforced concrete column and with the increasing of the thickness of steel bone the antiknock property of L steel reinforced concrete special-shaped column has enhanced.
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33

Shan, Liang, Liang Zhang, and Li Hua Xu. "Experimental Investigations on Mechanical Properties of Hybrid Steel-Polypropylene Fiber-Reinforced Concrete." Applied Mechanics and Materials 638-640 (September 2014): 1550–55. http://dx.doi.org/10.4028/www.scientific.net/amm.638-640.1550.

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The mechanical tests of hybrid steel-polypropylene fiber-reinforced concrete (HSPFRC) have been carried out. Concretes containing different volume fraction and aspect ratio of steel and polypropylene fibers mixed in one concrete grade were critically analyzed in terms of compressive, split tensile, axial tensile properties. Test results show that the fibers, when used in a hybrid form, can result in superior mechanical performance compared to their individual fiber-reinforced concretes.
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34

Zhang, Bing, Jun-Liang Zhao, Tao Huang, Ning-Yuan Zhang, Yi-Jie Zhang, and Xia-Min Hu. "Effect of fiber angles on hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns under monotonic axial compression." Advances in Structural Engineering 23, no. 7 (January 2, 2020): 1487–504. http://dx.doi.org/10.1177/1369433219895916.

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Hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns are a novel form of hollow columns that combine two traditional construction materials (i.e. concrete and steel) with fiber-reinforced polymer composites. Hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns consist of an inner tube made of steel, an outer tube made of fiber-reinforced polymer, and a concrete layer between the two tubes. Existing studies, however, are focused on hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns with fibers of the fiber-reinforced polymer tube oriented in the hoop direction or close to the hoop direction. In order to investigate the effect of fiber angles (i.e. the fiber angle between the fiber orientation and the longitudinal axis of the fiber-reinforced polymer tube), monotonic axial compression tests were conducted on hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns with an fiber-reinforced polymer tube of ±45°, ±60°, or ±80° fiber angles. There were two types of steel tubes adopted for these hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns. The fiber-reinforced polymer tube thickness was also investigated as an important parameter. Experimental results showed that the confinement effect of the fiber-reinforced polymer tube increased with the increase of the absolute value of fiber angles, whereas the ultimate axial strain of hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns decreased with the increase of the absolute value of fiber angles. An existing stress–strain model, which was developed on the basis of hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns with an fiber-reinforced polymer tube of ±90° fiber angles, is verified using the test results of this study. For the compressive strength of the confined concrete in hybrid fiber-reinforced polymer–concrete–steel double-skin tubular columns, the existing model provides conservative predictions for specimens with a ±80° fiber-reinforced polymer tube, overestimated predictions for specimens with a ±60° fiber-reinforced polymer tube, and close predictions for specimens with a ±45° fiber-reinforced polymer tube.
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35

Wu, Hailin, Zijia Mi, and Ziqiang Pei. "Experimental study on the crack resistance of steel-nanometre hybrid fibre concrete." E3S Web of Conferences 341 (2022): 01008. http://dx.doi.org/10.1051/e3sconf/202234101008.

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To investigate the effects of steel fibre and nanometre fibre on the cracking of reinforced concrete, the cracking resistance of steel fibre reinforced concrete, nanometre fibre reinforced concrete, and hybrid fibre reinforced concrete with different doping levels were studied in comparison with the baseline concrete specimens by steel-Nano hybrid fibre reinforced concrete axial tensile tests. The results show that when the steel fibre admixture is 1.5% and the nanometre fibre admixture is 0.05%, the initial cracking load of reinforced steel-Nano hybrid fibre axial tensile specimens is enhanced the most, at this time, compared with the initial cracking load of plain concrete specimens by 58.9%, at the same steel stress level, when the steel fibre admixture is 1.5% and the nanometre fibre admixture is 0.10%, it is most effective for crack control.
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36

Anandan, Sivakumar, Sounthararajan Vallarasu Manoharan, and Thirumurugan Sengottian. "Corrosion Effects on the Strength Properties of Steel Fibre Reinforced Concrete Containing Slag and Corrosion Inhibitor." International Journal of Corrosion 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/595040.

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Corrosion in steel can be detrimental in any steel rebar reinforced concrete as well as in the case of steel fibre reinforced concrete. The process of corrosion occurring in steel fibre incorporated concrete subjected to corrosive environment was systematically evaluated in this study. Concrete specimens were prepared with steel fibre inclusions at 1.5%Vf(volume fraction) of concrete and were added in slag based concrete (containing manufactured sand) and replaced with cement at 20%, 40%, and 60% of total binder. Accelerated corrosion studies were carried out using alternate wetting and drying cycle accompanied with initial stress at 40% and 60% of ultimate stress. Concrete specimens were then immersed in chloride-free water and sodium chloride solution (3.5%) after subjecting to initial stress. The alternate wetting and drying process of different concrete mixes was continued for longer exposure (6 months). Later, the strength degradation during the accelerated corrosion process was then assessed in compressive and flexural tests. Test results indicated that the strength degradation was marginal in the case of steel fibre reinforced concrete containing higher slag content and for the concretes containing corrosion inhibitors. The maximum strength reduction was noticed in the case of plain concrete containing steel fibres and, with the slag addition, a considerable reduction in corrosion potential was noticed. Also, with the increase in slag replacement up to 60%, a significant increase in strength was noticed in flexural test. Experimental test results also showed that the corrosion process in steel fibre reinforced concrete can be controlled with the incorporation of corrosion inhibitors in cementitious system.
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37

Miao, Yuan Yao, Di Tao Niu, and Yan Wang. "Steel Fiber Reinforced Concrete Carbonation Simulation Research." Advanced Materials Research 243-249 (May 2011): 108–11. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.108.

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Durability of concrete structure due to carbonation problem has attracted worldwide attention. By studying on the performance of steel fiber reinforced concrete carbonation, simulations CO2corrosion environment was simulated. The impacts of the change law of carbonation depth of steel fiber reinforced concrete with water cement ratio (0.35,0.45,0.55), as well as steel fiber content (0%, 0.5%, 1.0%, 1.5% , 2.0%), pouring surface and age, on concrete carbonation depth were studied. Steel fiber reinforced concrete carbonation performance improvement role was analyzed. Thus, providing a experimental basis that can be used in the design and analysis of the durability of steel fiber reinforced concrete structure.
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38

Yin, Ying Zi, Yan Zhang, and Gen Tian Zhao. "Research on Bearing Capacity of Axiallycompressed Short Columns." Applied Mechanics and Materials 405-408 (September 2013): 958–63. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.958.

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Abstract: Steel reinforced concrete structure (SRC) is commonly used in high building, but the research on properties of steel reinforced high strength concrete structure (HSRC) composed of high strength concrete and steel reinforced concrete is rarely carried out. In this paper, a series of problems in HSRC structure application is studied, including the steel radio, the stirrup ratio. The conclusions can be served for design specification of steel reinforced high strength concrete column
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39

I. Lapenko, O., O. V. Shevchenko, and N. Masud. "Compression Work of Steel Reinforced Concrete Columns." International Journal of Engineering & Technology 7, no. 3.2 (June 20, 2018): 229. http://dx.doi.org/10.14419/ijet.v7i3.2.14408.

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The article deals with the calculation of steel reinforced concrete columns compression and verification of local stability in fixed formwork. It is concluded that it is expedient to calculate the total stability for the resulted sections, and when checking local stability – to follow the instructions Eurocode 4. When checking the local stability of steel sheets, working as part of reinforced concrete structures, the Eurocode 4 guidelines should be followed, while taking into account the following requirements: leave out of account on the local stability of the concrete cross-section (the steel profile is completely surrounded by concrete); concrete cross-section (steel profile is completely concrete, partially concrete cross-section), the steel profile is only partially covered with concrete, as well as for other cross-sections of reinforced concrete columns provided by Eurocode 4 with the corresponding ratio d/ t. The calculation method for the given sections in the calculation of the overall stability of compressed steel reinforced concrete elements is the simple stand one that gives satisfactory results. Calculations show that the loss of local stability of a steel sheet that works concurrently with reinforced concrete occurs at stresses greater than the force of flow in a steel sheet.
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40

Guo, Quan Quan, Yu Xi Zhao, and Kun Shang. "Experimental Research on Eccentric Compressive Performance of Steel Tube-Reinforced Concrete Column." Advanced Materials Research 163-167 (December 2010): 184–90. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.184.

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Eccentric loading experiment of 13 steel tube-reinforced concrete columns and a reinforced concrete column is implemented. The whole process from the start load on the steel tube-reinforced concrete column until damage has been researched. Change of ultimate bearing capacity with eccentricity, longitudinal reinforcement ratio, position coefficient has been studied, and deflection curve and load-vertical displacement curve under eccentric compressive load were obtained. Failure characteristics of steel tube-reinforced concrete were divided into two different type, small eccentric damage and big eccentric damage. With the same conditions, when steel tube ratio of steel tube-reinforced concrete was 2%, its ultimate bearing capacity was nearly double of reinforced concrete columns.
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41

Liu, Xiaoxian, Jianzhong Li, Hing-Ho Tsang, and John Wilson. "Enhancing seismic performance of unbonded prestressed concrete bridge column using superelastic shape memory alloy." Journal of Intelligent Material Systems and Structures 29, no. 15 (July 5, 2018): 3082–96. http://dx.doi.org/10.1177/1045389x18783074.

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In this article, an application of superelastic shape memory alloy strands for improving the seismic performance of unbonded prestressed reinforced concrete bridge column is proposed. In the reinforced concrete column with unbonded prestressing steel-shape memory alloy strands, superelastic shape memory alloy strands are put in series with unbonded steel strands, and the loading plateau of shape memory alloy is exploited to limit the increase in the axial load of column under an earthquake. Quasi-static analysis and seismic analysis were conducted to compare the seismic performance of conventional reinforced concrete column, reinforced concrete column with unbonded prestressing steel strands, and the proposed reinforced concrete column with unbonded prestressing steel-shape memory alloy strands. Result shows that reinforced concrete column with unbonded prestressing steel-shape memory alloy strands has larger ultimate displacement capacity than reinforced concrete column with unbonded prestressing steel strands in the quasi-static analysis. In the seismic analysis, reinforced concrete column with unbonded prestressing steel-shape memory alloy strands suffers from smaller earthquake residual displacement than reinforced concrete column and reinforced concrete column with unbonded prestressing steel strands. Furthermore, parametric analysis was carried out to investigate the effects of unbonded steel strand ratio, prestressing force ratio, bonded longitudinal reinforcement ratio, and maximum tensile force ratio (area of shape memory alloy strands) on the ultimate displacement and quasi-static residual displacement of reinforced concrete column with unbonded prestressing steel-shape memory alloy strands. Results show that increasing the prestressing force ratio and the maximum tensile force ratio within certain ranges can improve the self-centering capability of column. Increasing the area of bonded longitudinal reinforcement and unbonded steel strand ratio results in larger residual displacement.
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42

Da, Bo, Hongfa Yu, Haiyan Ma, Bo Yu, Zhangyu Wu, and Jianbo Guo. "Study on shear behavior of reinforced coral aggregate concrete beam." Advances in Structural Engineering 23, no. 11 (April 13, 2020): 2388–98. http://dx.doi.org/10.1177/1369433220915610.

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Reinforced coral aggregate concrete beam and reinforced ordinary aggregate concrete beam with different concrete type, concrete strength, and steel type were designed in this study to investigate their shear behavior. The shear behavior of reinforced coral aggregate concrete beam was tested, the failure mode and deflection behavior were studied, and the calculating model for the ultimate shear capacity ( Vcs) of reinforced coral aggregate concrete beam was proposed. Results showed that the failure mode of reinforced ordinary aggregate concrete beam and reinforced coral aggregate concrete beam were basically the same. As the concrete strength increases, the normal section cracking load ( Vcr), inclined section Vcr, and Vcs of reinforced coral aggregate concrete beam increased gradually. Furthermore, Vcr and Vcs of reinforced coral aggregate concrete beam were as follows: 316 stainless steel > common steel > zinc-chromium coated steel > new organic coated steel. For the coral aggregate concrete structure in ocean engineering, in order to prolong its service life, the use of new organic coated steel was suggested. At the same time, the influence of high-strength coral aggregate concrete and stirrup corrosion was comprehensively considered and the calculation model for the Vcs of reinforced coral aggregate concrete beam was presented and was then verified.
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43

Jin, Huan. "Research on the Calculation Method for Diagonal Shear Capacity of Steel Reinforced Lightweight Concrete Beams." Advanced Materials Research 724-725 (August 2013): 1677–80. http://dx.doi.org/10.4028/www.scientific.net/amr.724-725.1677.

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Steel reinforced lightweight aggregate concrete structure is a new type of composite structure to meet the building development trend of energy conservation and environmental protection. Based on the shear tests of steel reinforced lightweight concrete beams, according to the specifications of lightweight concrete and steel reinforced concrete, this paper established a design formula for calculating the shear capacity of steel reinforced lightweight concrete beams under the concentrated loads. The results coincided well with the tests. The calculation method is reliable, which can provide theoretical foundations for the practical engineering application of steel reinforced light aggregate concrete beam.
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44

Mastali, M., M. Mastali, Z. Abdollahnejad, M. Ghasemi Naghibdehi, and M. K. Sharbatdar. "Numerical Evaluations of Functionally Graded RC Slabs." Chinese Journal of Engineering 2014 (September 10, 2014): 1–20. http://dx.doi.org/10.1155/2014/768956.

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Nowadays, using fibrous materials is used widely in strengthening applications such as cross-section enlargement and using functionally graded reinforced concrete. Functionally graded reinforced concrete is used as multireinforced concrete layers that can be reinforced by different fiber types. The objective of this research was to address the structural benefits of functionally graded concrete materials by performing analytical simulations. In order to achieve this purpose, in the first stage of this study, three functionally graded reinforced concretes by steel and polypropylene (PP) were experimentally tested under flexural loading. Inverse analysis was applied to obtain the used material properties of reinforced concrete by FEMIX software. After obtaining the material properties, to assess the performance of proposed slabs, some other cases were proposed and numerically evaluated under flexural and shear loading. The results showed that increasing steel fiber in reinforced entire cross section led to achieve better shear and flexural performance while the best performance of reinforced functionally graded slabs was achieved for slab at 1% fiber content. In the second stage, nineteen reinforced functionally graded RC slabs with steel bars were simulated and assessed and some other cases were considered which were not experimentally tested.
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45

Zhao, Jun, Li Jun Wang, and Dan Ying Gao. "Load and Deformation Properties of Steel Fiber Reinforced Concrete ShearWall." Applied Mechanics and Materials 69 (July 2011): 23–27. http://dx.doi.org/10.4028/www.scientific.net/amm.69.23.

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The numerical simulation by nonlinear finite element method(FEM) was adopted to analyze the behavior and the influences of the volume fraction of steel fibers and the strength of steel fiber reinforced concrete on the load capacity and the deformation performance of reinforced concrete shearwalls.The effect of steel fiber on the FEM was determined. The results show that with the increase of the volume fraction of steel fibers, the crack load, bearing capacity and ductility coefficient of steel fiber reinforced concrete shearwalls increase gradually. With the increase of the strength of steel fiber reinforced concrete, the bearing capacity and ductility coefficients of steel fiber reinforced concrete shearwalls decrease.
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46

Montava, Irles, Pomares, and Gonzalez. "Experimental Study of Steel Reinforced Concrete (SRC) Joints." Applied Sciences 9, no. 8 (April 12, 2019): 1528. http://dx.doi.org/10.3390/app9081528.

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This research analyzes the solution of reinforced concrete joints reinforced with steel sections, known as steel reinforced concrete (SRC). The aim is to verify the improvement of the ductile characteristics of steel reinforced concrete structures compared to conventional reinforced concrete structures. Another objective is to better understand the experimental behavior and thus be able to perform numerical simulations adjusted with the experimental ones. In addition, the behavior of reinforced concrete structures in all the bars with steel sections is compared with others in which only the joints are reinforced to obtain more efficient and economical structures. All these objectives have the main purpose of improving the behavior of structures against seismic loads. Five specimens of concrete joints with reinforced with steel were tested with cyclic loads to analyze their behavior. The strength superposition method can predict the shear strength. The results obtained confirm the greater capacity of absorption of energy of the structures with sections of steel embedded compared with the structures of conventional reinforced concrete, with greater ductility when facing large displacements.
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47

Zhao, Shun Bo, Su Yang, Xue Zhen Feng, and Mei Jun Lu. "Study on Thermal Conductivity of Reinforced Concrete Plate." Applied Mechanics and Materials 438-439 (October 2013): 321–28. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.321.

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By the heat flow meter method, the thermal conductivity of reinforced concrete was experimental studied for the energy conservation design of reinforced concrete composite wall as building envelop. The steel bars were arranged as horizontal one-way, horizontal two-way and vertical in the reinforced concrete plates with different reinforcement volume ratio. Based on the test results, the effects of arrangement of steel bar and reinforcement volume ratio on thermal conductivity of reinforced concrete were analyzed. It can be concluded that the thermal conductivity of reinforced concrete was higher than that of concrete and increased with the reinforcement volume fraction, the steel bars in horizontal two-way arrangement brought the reinforced concrete with greater thermal conductivity than that in one-way arrangement, the vertical steel bar made the reinforced concrete with significantly higher thermal conductivity. The series-parallel model and parallel-series model are proposed for predicating the thermal conductivity of reinforced concrete with horizontal steel bars.
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48

Sinha, Deepa A., Dr A. K. Verma Dr. A.K.Verma, and Dr K. B. Prakash Dr. K.B. Prakash. "Behavior of steel fibre reinforced ternary blended concrete under flexure." International Journal of Scientific Research 1, no. 6 (June 1, 2012): 40–42. http://dx.doi.org/10.15373/22778179/nov2012/14.

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49

Li, Jun-Tao, Zong-Ping Chen, Jin-Jun Xu, Cheng-Gui Jing, and Jian-Yang Xue. "Cyclic behavior of concrete-filled steel tubular column–reinforced concrete beam frames incorporating 100% recycled concrete aggregates." Advances in Structural Engineering 21, no. 12 (February 7, 2018): 1802–14. http://dx.doi.org/10.1177/1369433218755521.

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Concrete-filled steel tubular structural members can be recognized as an effective mean to improve the mechanical behavior in terms of strength, stiffness, ductility, and energy dissipation for the initial recycle aggregate concrete deficiencies compared with natural aggregate concrete. A small-scale model of square concrete-filled steel tubular column–reinforced concrete beam frame realized employing 100% recycled coarse aggregates was tested under combined axial loads and cyclic reversed lateral flexure. The failure modes, plastic hinges sequence, hysteresis loop, skeleton curve, stiffness degeneration, energy dissipation capacity, and ductility of the frame were presented and analyzed in detail. The structural behavior of square concrete-filled steel tubular column–reinforced concrete beam frame with 100% recycled coarse aggregates was compared with circular concrete-filled steel tubular column–reinforced concrete beam frame made with 100% recycled coarse aggregates. A fiber-based program model for the nonlinear analysis of concrete-filled steel tubular column–reinforced concrete beam frames incorporating recycled coarse aggregates was developed using SeismoStruct, to highlight the effect of recycled coarse aggregate content on mechanical behavior of recycled aggregate concrete and the confinement effect provided by outer tubes on core concrete. The analysis results show that the numerical model can well simulate and predict the seismic behavior of concrete-filled steel tubular column–reinforced concrete beam frames with 100% recycled coarse aggregate content. Both experimental and numerical results demonstrate that concrete-filled steel tubular column–reinforced concrete beam frames with large content of recycled coarse aggregates have a receivable seismic performance, and it is feasible to apply and popularize recycled aggregate concrete into concrete-filled steel tubular structures in seismic regions.
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50

Wang, Lei, Jiwang Zhang, Changshi Huang, and Feng Fu. "Comparative Study of Steel-FRP, FRP and Steel-Reinforced Coral Concrete Beams in Their Flexural Performance." Materials 13, no. 9 (May 1, 2020): 2097. http://dx.doi.org/10.3390/ma13092097.

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In this study, a comparative study of carbon fiber reinforced polymer (CFRP) bar and steel–carbon fiber composite bar (SCFCB) reinforced coral concrete beams was made through a series of experimental tests and theoretical analyses. The flexural capacity, crack development and failure modes of CFRP and SCFCB-reinforced coral concrete were investigated in detail. They were also compared to ordinary steel-reinforced coral concrete beams. The results show that under the same conditions of reinforcement ratios, the SCFCB-reinforced beams exhibit better performance than CFRP-reinforced beams, and stiffness is slightly lower than that of steel-reinforced beams. Under the same load conditions, the crack width of SCFCB beams was between that of steel-reinforced beams and CFRP bar-reinforced beams. Before the steel core yields, the crack growth rate of SCFCB beam is similar to the steel-reinforced beams. SCFCB has a higher strength utilization rate—about 70–85% of its ultimate strength. Current design guidance was also examined based on the test results. It was found that the existing design specifications for FRP-reinforced normal concrete is not suitable for SCFCB-reinforced coral concrete structures.
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