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Journal articles on the topic 'Shear strength, high performance concrete beams'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 January 2023

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1

Qi, Jianan, Xiaomeng Ding, Zhen Wang, and Yuqing Hu. "Shear strength of fiber-reinforced high-strength steel ultra-high-performance concrete beams based on refined calculation of compression zone depth considering concrete tension." Advances in Structural Engineering 22, no. 8 (2019): 2006–18. http://dx.doi.org/10.1177/1369433219829805.

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This article presents an experimental and theoretical investigation on the shear behavior of fiber-reinforced ultra-high-performance concrete beams reinforced with high-strength steel. The test parameters included the fiber volume fraction, fiber type, and stirrup ratio. The test results indicate that the shear failure in ultra-high-performance concrete beams is not brittle and catastrophic but has ductility characteristics. A moderate quantity of stirrups can significantly improve the shear behavior of ultra-high-performance concrete beams, as reflected in the thorough propagation of cracks i

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2

Chabib, H. El, M. Nehdi, and A. Saïd. "Predicting the effect of stirrups on shear strength of reinforced normal-strength concrete (NSC) and high-strength concrete (HSC) slender beams using artificial intelligence." Canadian Journal of Civil Engineering 33, no. 8 (2006): 933–44. http://dx.doi.org/10.1139/l06-033.

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The exact effect that each of the basic shear design parameters exerts on the shear capacity of reinforced concrete (RC) beams without shear reinforcement (Vc) is still unclear. Previous research on this subject often yielded contradictory results, especially for reinforced high-strength concrete (HSC) beams. Furthermore, by simply adding Vc and the contribution of stirrups Vs to calculate the ultimate shear capacity Vu, current shear design practice assumes that the addition of stirrups does not alter the effect of shear design parameters on Vc. This paper investigates the validity of such a

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3

Yun, Ying Wei, Qin Luo, Il Young Jang, Shan Shan Sun, and Jia Wei Zhang. "Experimental Research on the Ductility of High Performance Concrete Beams." Applied Mechanics and Materials 166-169 (May 2012): 1316–20. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.1316.

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Ductility is important in the design of reinforced concrete structures. In seismic design of reinforced concrete members, it is necessary to allow for relatively large ductility so that the seismic energy is absorbed to avoid shear failure or significant degradation of strength even after yielding of reinforcing steels in the concrete member occurs. This paper aims to present the basic data for the ductility evaluation of reinforced HPC (high performance concrete) beams. Accordingly, 10 flexural tests were conducted on full-scale structural concrete beam specimens having concrete compressive s

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4

Pourbaba, Masoud, Hamed Sadaghian, and Amir Mirmiran. "A comparative study of flexural and shear behavior of ultra-high-performance fiber-reinforced concrete beams." Advances in Structural Engineering 22, no. 7 (2019): 1727–38. http://dx.doi.org/10.1177/1369433218823848.

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In this research, the flexural and shear behavior of five locally developed ultra-high-performance fiber-reinforced concrete beams was experimentally investigated. Four-point loading tests were carried out on concrete specimens which were further compared with five normal-strength concrete beams constructed at the laboratory. The objective of this study is to assess the flexural and shear behavior of ultra-high-performance fiber-reinforced concrete beams and compare them with that of normal-strength beams and available equations in the literature. Results indicate underestimation of shear (up

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5

Ibrahim, Basil, Moussa Leblouba, Salah Altoubat, and Samer Barakat. "Shear Strength of Externally U-Bonded Carbon Fiber-Reinforced Polymer High-Strength Reinforced Concrete." Materials 14, no. 13 (2021): 3659. http://dx.doi.org/10.3390/ma14133659.

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In this paper, we investigate the contribution of Fiber-Reinforced Polymer (FRP) to the load-carrying capacity of shear-strengthened Reinforced Concrete (RC) beams. Specifically, the investigation is focused on the FRP’s contribution in the presence and absence of shear stirrups. To this end, two sets of full-scale RC beam specimens were tested to failure in a simply supported setup. Set 1 consisted of specimens without shear stirrups whereas Set 2 included steel stirrups spaced at 170 mm. One and two layers of FRP discrete strips were bonded to the beams in a U-jacketing configuration. To inv

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6

Yuan, Tian-Feng, Se-Hee Hong, Hyun-Oh Shin, and Young-Soo Yoon. "Bond Strength and Flexural Capacity of Normal Concrete Beams Strengthened with No-Slump High-Strength, High-Ductility Concrete." Materials 13, no. 19 (2020): 4218. http://dx.doi.org/10.3390/ma13194218.

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This study investigates the flexural behavior of normal-strength concrete (NSC) beams that were strengthened with no-slump, high-strength, high-ductility concrete (NSHSDC). A set of slant shear tests was performed to investigate the initial performance of the NSC substrate strengthened with NSHSDC. Slant shear tests considered two types of roughness of interface and five angles of the interface between NSC and NSHSDC. The test results showed that except for specimens with a 75° interface angle, the specimens with high roughness were conformed to the properties (14–21 MPa for 28 days) of the AC

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Mahmood, Enas M., Abbas A. Allawi, and Ayman El-Zohairy. "Flexural Performance of Encased Pultruded GFRP I-Beam with High Strength Concrete under Static Loading." Materials 15, no. 13 (2022): 4519. http://dx.doi.org/10.3390/ma15134519.

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There is an interesting potential for the use of GFRP-pultruded profiles in hybrid GFRP-concrete structural elements, either for new constructions or for the rehabilitation of existing structures. This paper provides experimental and numerical investigations on the flexural performance of reinforced concrete (RC) specimens composite with encased pultruded GFRP I-sections. Five simply supported composite beams were tested in this experimental program to investigate the static flexural behavior of encased GFRP beams with high-strength concrete. Besides, the effect of using shear studs to improve

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8

Demakos, Constantinos B., Constantinos C. Repapis, and Dimitros P. Drivas. "Experimental Investigation of Shear Strength for Steel Fibre Reinforced Concrete Beams." Open Construction & Building Technology Journal 15, no. 1 (2021): 81–92. http://dx.doi.org/10.2174/1874836802115010081.

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Aims: The aim of this paper is to investigate the influence of the volume fraction of fibres, the depth of the beam and the shear span-to-depth ratio on the shear strength of steel fibre reinforced concrete beams. Background: Concrete is a material widely used in structures, as it has high compressive strength and stiffness with low cost manufacturing. However, it presents low tensile strength and ductility. Therefore, through years various materials have been embedded inside it to improve its properties, one of which is steel fibres. Steel fibre reinforced concrete presents improved flexural,

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9

Hou, Li-Qun, Shi-Cai Chen, Wei-Ming Yan, and Kang-Suk Kim. "Mechanical performance of space sandwich joints under bidirectional cyclic loading." Advances in Structural Engineering 22, no. 1 (2018): 69–80. http://dx.doi.org/10.1177/1369433218778403.

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In high-rise buildings with high-strength concrete column and normal-strength concrete floor, the beams and slabs are usually cast in a continuous fashion through the beam–column joint to simplify construction, and this results in the lower strength concrete at the beam–column joint core (sandwich joint). It will influence the capacity of the joint. In this article, three groups of three-dimensional specimens consisting of sandwich joint specimens and corresponding traditional joint specimens were tested under bidirectional reversed cyclic loads to investigate seismic performance, including th

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10

Kamonna, Hayder H. H., Qasim M. Shakir, and Haider A. Al-Tameemi. "Behavior of High-Strength Self-Consolidated Reinforced Concrete T-Deep Beams." Open Construction and Building Technology Journal 14, no. 1 (2020): 51–69. http://dx.doi.org/10.2174/1874836802014010051.

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Background: When a beam is loaded on two opposite faces and the beam’s depth is increased such that either the span-to-depth ratio is smaller than four or the shear-span-to-depth ratio is less than two, it will behave like a deep beam. Strain distribution in deep beams is different from that of ordinary beams because it is nonlinear along with the beam depth. If the beam is cast monolithically with a slab in the slab–beam system, it is considered a T-deep beam. The behavior of the resulting member is more complicated. Objective: The effect of flange width on the behavior of high-strength self-

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11

Bae, Baek-Il, Moon-Sung Lee, Chang-Sik Choi, Hyung-Suk Jung, and Hyun-Ki Choi. "Evaluation of the Ultimate Strength of the Ultra-High-Performance Fiber-Reinforced Concrete Beams." Applied Sciences 11, no. 7 (2021): 2951. http://dx.doi.org/10.3390/app11072951.

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Evaluation of the ultimate strength for the UHPFRC (ultra-high-performance fiber-reinforced concrete) flexural members was conducted. In this study, an experimental program about UHPFRC beams was conducted with the effect of fiber volume fraction, shear span to depth ratio, and compressive strength of matrix as the main variables. Among them, it was found that fiber volume fraction was the variable that had the greatest influence on the ultimate strength. The inclusion of 2% volume fraction steel fiber increases the shear and flexural strength of UHPFRC beams significantly. In particular, stee

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12

Kodsy, Antony, and George Morcous. "Shear Strength of Ultra-High-Performance Concrete (UHPC) Beams without Transverse Reinforcement: Prediction Models and Test Data." Materials 15, no. 14 (2022): 4794. http://dx.doi.org/10.3390/ma15144794.

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The use of Ultra-High-Performance Concrete (UHPC) in beams has been growing rapidly in the past two decades due to its superior mechanical and durability properties compared to conventional concrete. One of the areas of interest to designers is the elimination of transverse reinforcement as it simplifies beam fabrication/construction and could result in smaller and lighter beams. UHPC has a relatively high post-cracking tensile strength due to the presence of steel fibers, which enhance its shear strength and eliminate the need for transverse reinforcement. In this paper, UHPC shear test data

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13

Leng, Yubing, and Xiaobing Song. "Application of steel-concrete-steel sandwich deep beams into coupled shear walls." Advances in Structural Engineering 22, no. 1 (2018): 214–22. http://dx.doi.org/10.1177/1369433218783297.

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Coupled shear walls are widely used as the primary lateral load resisting element in high-rise buildings. But the coupling beams, which are often designed as deep members, usually suffer from brittle shear failure. The steel-concrete-steel sandwich deep beams showed high bearing capacity and great ductile performance during shear failure. Therefore, it is proposed that the steel-concrete-steel members can be used into deep coupling beams instead of conventional reinforced concrete members, to improve the shear strength and deformability. The shear failure of steel-concrete-steel deep beams is

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14

Hakim, S. J. S., M. A. H. Mohd Rodzi, S. S. Ayop, S. Shahidan, S. N. Mokhatar, and N. Salleh. "Shear Strengthening of Reinforced Concrete Beams Using Fibre Reinforced Polymer: A Critical Review." IOP Conference Series: Materials Science and Engineering 1200, no. 1 (2021): 012015. http://dx.doi.org/10.1088/1757-899x/1200/1/012015.

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Abstract The primary purpose of reinforcing bar stirrups in a reinforced concrete beam is to improve shear strength. The FRP system may significantly improve a concrete beam’s ultimate shear strength, serviceability, and ductility. The application of FRP for the repair and reinforcement of the structures has become very popular due to its low weight, high tensile strength, and simplicity of installation on uneven surfaces. FRP material outperforms other traditional materials in strengthening applications due to its high strength-to-weight and stiffness-to-weight ratios, resistance to corrosion

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15

Liu, Sheng Bing, Li Hua Xu, Hai Lin Lu, and Hao Tan. "Design Method of Shear Resistance of Hybrid Fiber Reinforced High Performance Concrete Deep Beams." Applied Mechanics and Materials 477-478 (December 2013): 686–89. http://dx.doi.org/10.4028/www.scientific.net/amm.477-478.686.

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In order to study the shear resistance and design method of hybrid fiber (steel fiber and polypropylene fiber) reinforced high performance concrete deep beams, the shear tests were conducted according to the orthogonal experimental design. The contributory factors such as the characteristic parameters of steel fiber (types, volume fraction, aspect ratio), the volume fraction of polypropylene fiber, the ratio of web horizontal reinforcement and the ratio of web vertical reinforcement were analyzed. Results illuminate that shear failure mode of hybrid fiber reinforced HPC deep beams are splittin

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16

Shi, Qi Yin, and Li Li Liu. "Research on the Shear Strength of High-Strength Concrete Beams with Web Bars by Concentrated Load." Advanced Materials Research 859 (December 2013): 70–75. http://dx.doi.org/10.4028/www.scientific.net/amr.859.70.

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Based on the previous results on the experimental study of shear performance of high-strength concrete beam and the application of mathematical statistics theory, the page establish the shearing strength formula of high strength concrete beams under concentrated load . Comparing regression formula and GB50010-2010 calculated value with the experimental results respectively, it shows that the ultimate strength calculated by regression analysis matches with the experimental results well, but GB2010 calculated results is unsafe.

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17

Youssf, Osama, Reza Hassanli, Julie E. Mills, Xing Ma, and Yan Zhuge. "Cyclic Performance of Steel–Concrete–Steel Sandwich Beams with Rubcrete and LECA Concrete Core." Journal of Composites Science 3, no. 1 (2019): 5. http://dx.doi.org/10.3390/jcs3010005.

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Due to the structural and economic features of steel–concrete–steel (SCS) structural systems compared with conventional reinforced concrete ones, they are now used for a range of structural applications. Rubcrete, in which crumbed rubber from scrap tires partially replaces mineral aggregates in concrete, can be used instead of conventional concrete. Utilizing rubber waste in concrete potentially results in a more ductile lightweight concrete that can introduce additional features to the SCS structural members. This study aimed to explore different concrete core materials in SCS beams and the a

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18

Liu, Sheng Bing, and Lihua Xu. "Experimental Study on Shear Behavior of Hybrid Fiber Reinforced High Performance Concrete Deep Beams." Applied Mechanics and Materials 166-169 (May 2012): 664–69. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.664.

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In order to investigate the effect of steel fiber and polypropylene fiber on shear behavior of HPC deep beams, the shear tests were conducted on 18 different groups of deep beams with steel fiber and polypropylene fiber and 2 groups of HPC deep beams without fiber according to the orthogonal experiment. 6 factors, including the shape of steel fiber, the volume fraction of steel fiber, the aspect ratio of steel fiber, the volume fraction of polypropylene fiber, the ratio of web horizontal reinforcement and the ratio of web vertical reinforcement, were compared by direct-viewing analysis. Result

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19

Yun, Hyun-Do, Gwon-Young Jeong, and Won-Chang Choi. "Shear Strengthening of High Strength Concrete Beams That Contain Hooked-End Steel Fiber." Materials 15, no. 1 (2021): 17. http://dx.doi.org/10.3390/ma15010017.

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Steel fiber has been used successfully in concrete mixtures to control volumetric changes, including shrinkage. However, the feasibility of the use of steel fiber has been restricted to nonstructural construction, such as ‘slab on ground’. Recently, researchers have attempted to expand the applications of steel fiber to replace structural reinforcement (rebar) and have shown promising results in its substitution for shear reinforcement. Few studies have been conducted to ensure the feasibility of using steel fiber in structural components, however. This experimental study was designed to inves

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20

Yao, Dali, Jinqing Jia, Feng Wu, and Fang Yu. "Shear performance of prestressed ultra high strength concrete encased steel beams." Construction and Building Materials 52 (February 2014): 194–201. http://dx.doi.org/10.1016/j.conbuildmat.2013.11.006.

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21

Solhmirzaei, Roya, and Venkatesh Kodur. "A Numerical Model for Tracing Structural Response of Ultra-High Performance Concrete Beams." Modelling 2, no. 4 (2021): 448–66. http://dx.doi.org/10.3390/modelling2040024.

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This paper presents a finite element-based numerical model for tracing the behavior of ultra-high performance concrete (UHPC) beams. The model developed in ABAQUS can account for stress–strain response of UHPC and reinforcing bar in both tension and compression, bond between concrete and reinforcing steel, and strain hardening effects in bars and UHPC and can trace the detailed response of UHPC beams in the entire range of loading. This model is validated by comparing predicted response parameters including load-strain, load-deflection, and crack propagation against experimental data governed

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22

Yang, Chun, Ming Ji He, Jian Cai, Yan Sheng Huang, and Yi Wu. "Study on Mechanical Behaviors and Calculation of Shear Strength of Steel Truss Reinforced Concrete Deep Beams." Advanced Materials Research 243-249 (May 2011): 514–20. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.514.

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Based on strut-and-tie model (STM) in deep beams, steel truss reinforced concrete (STRC) deep beam was developed. Experimental investigations of mechanical performances of STRC deep beams were carried out, and results show that STRC deep beam is of high ultimate bearing capacity, large rigidity and good ductility; Strut-and-tie force transference model is formed in STRC deep beams, and loads can be transferred in the shortest and direct way. Then Steel reinforced concrete (SRC) strut-and-tie model (SSTM) for determining the shear strength of STRC deep beams is proposed. The contribution of SRC

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23

Zhou, Longyun, Xiaojun Li, and Qiushi Yan. "Performance of Grouting Sleeve-Connected Prefabricated Beams Subjected to Impact Loading." Buildings 12, no. 12 (2022): 2146. http://dx.doi.org/10.3390/buildings12122146.

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The potential of accidental loads such as explosions and impacts cannot be overlooked given the widespread use of precast concrete (PC) buildings. However, research on the impact resistance of reinforced concrete precast beams is limited. In order to explore the dynamic behavior of PC beams connected by grouted sleeves under impact loads, this work developed a numerical model based on the finite element program LS-DYNA. First, the experimental process was described in detail, and the numerical model was evaluated and calibrated according to the experimental data. Then, parameters such as impac

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24

Yuan, Fang, Wangren Wei, and Ren Hu. "Shear strengthening of reinforced concrete beams with high-strength steel wire and engineered cementitious composites." Advances in Structural Engineering 25, no. 1 (2021): 158–70. http://dx.doi.org/10.1177/13694332211046346.

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Engineered cementitious composite (ECC) is a type of high-performance fibre-reinforced cementitious composite with good ductility and excellent crack control ability. It has attracted increasing attention as a structural repair material in severely corrosive environments. However, the strength improvement is limited when ECC is used alone for shear strengthening of existing reinforced concrete (RC) members, although its shear capacity is much higher than that of other brittle cementitious materials such as cement mortar. This study proposes a novel shear strengthening method for RC beams with

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25

Fang, Zhen, Shu Fang, and Feng Liu. "Experimental and Numerical Study on the Shear Performance of Short Stud Shear Connectors in Steel–UHPC Composite Beams." Buildings 12, no. 4 (2022): 418. http://dx.doi.org/10.3390/buildings12040418.

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Steel–ultra-high-performance concrete (UHPC) composite beams offer numerous advantages, such as structural self-weight reduction, bending stiffness improvement, and tensile cracking limitation in slabs. However, few studies have focused on the shear performance of short stud shear connectors in steel–UHPC composite structures. To this end, push-out tests were carried out to evaluate the effect of slab thickness, stud diameter, and casting method on the failure mode, load–slip relationship, ultimate shear strength, shear stiffness, and ductility. The test results indicate that by increasing the

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26

Lachemi, M., K. M. A. Hossain, and V. Lambros. "Shear resistance of self-consolidating concrete beams — experimental investigations." Canadian Journal of Civil Engineering 32, no. 6 (2005): 1103–13. http://dx.doi.org/10.1139/l05-066.

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Self-consolidating concrete (SCC) is a new generation of high performance concrete known for its excellent deformability and high resistance to segregation and bleeding. Lack of information regarding in situ properties and structural performance of SCC is one of the main barriers to its acceptance in the construction industry. There is some concern among researchers and designers that SCC may not be strong enough in shear because of some uncertainties in mechanisms resisting shear — notably the aggregate interlock mechanism. Because of the presence of comparatively smaller amount of coarse agg

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27

Zanuy, Carlos, and Gonzalo S. D. Ulzurrun. "Impact Resisting Mechanisms of Shear-Critical Reinforced Concrete Beams Strengthened with High-Performance FRC." Applied Sciences 10, no. 9 (2020): 3154. http://dx.doi.org/10.3390/app10093154.

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Reinforced concrete (RC) structures typically present brittle failures by shear or punching under impact loading. High-performance fiber-reinforced concrete (HPFRC) has great potential due to its superior strength and energy absorption. The higher price and environmental cost of HPFRC compared to conventional RC can be effectively overcome by partially strengthening impact-sensitive RC members with HPFRC. To study the feasibility of this technique, HPFRC was applied as a tensile layer at the bottom of RC beams. Drop weight impact tests were carried out on beams with two values (35 and 55 mm) o

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28

Xia, Jun, Kevin R. Mackie, Muhammad A. Saleem, and Amir Mirmiran. "Shear failure analysis on ultra-high performance concrete beams reinforced with high strength steel." Engineering Structures 33, no. 12 (2011): 3597–609. http://dx.doi.org/10.1016/j.engstruct.2011.06.023.

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29

Aghani, Kian, and Hassan Afshin. "Experimental and Numerical Investigation on Shear Retrofitting of RC Beams by Prefabricated UHPFRC Sheets." Civil Engineering Journal 2, no. 5 (2016): 168–79. http://dx.doi.org/10.28991/cej-2016-00000023.

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Different methods are used for retrofitting RC members. One of the new methods in this field is using externally bonded fiber-reinforced Concrete (FRC) sheets in order to increase RC member’s shear and flexural strength. In this study, applicability of ultra-high performance fiber-reinforced concrete sheets in shear and flexural retrofitting of RC beams was investigated. In total, eight RC beams (dimensions 10×20×150 cm) with two different bending capacity and lack of shear strength were used and were tested in 3-points bending test. Of these, four were control beams and four were retrofitted

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30

Li, Xiaoke, Changyong Li, Minglei Zhao, Hui Yang, and Siyi Zhou. "Testing and Prediction of Shear Performance for Steel Fiber Reinforced Expanded-Shale Lightweight Concrete Beams without Web Reinforcements." Materials 12, no. 10 (2019): 1594. http://dx.doi.org/10.3390/ma12101594.

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In this paper, for a wide application of high-performance steel fiber reinforced expanded-shale lightweight concrete (SFRELC) in structures, the shear behavior of reinforced SFRELC beams without web reinforcements was experimentally investigated under a four-point bending test. Twenty-six beams were fabricated considering the influencing parameters of SFRELC strength, shear-span to depth ratio, longitudinal reinforcement ratio and the volume fraction of the steel fiber. The statistical analyses based on the foundational design principles and the experimental results are made based on the shear

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31

Said, Asmaa, Mahmoud Elsayed, Ahmed Abd El-Azim, Fadi Althoey, and Bassam A. Tayeh. "Using ultra-high performance fiber reinforced concrete in improvement shear strength of reinforced concrete beams." Case Studies in Construction Materials 16 (June 2022): e01009. http://dx.doi.org/10.1016/j.cscm.2022.e01009.

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Shan, Bo, Yan Xiao, Wei Liang Zhang, and Bo Liu. "Mechanical Performance of Connections for GluBam-Concrete Composite Beams." Applied Mechanics and Materials 847 (July 2016): 521–28. http://dx.doi.org/10.4028/www.scientific.net/amm.847.521.

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Selecting composite connections is a crucial factor for researching mechanical performance of GluBam-concrete composite structure (BCC). An initial stage of research on the feasibility of GluBam-concrete composite beams is described. Total three types of composite connector, six specimens in each type, have been conducted direct shear tests on small blocks. The shear-relative slip curves were measured and all the relevant mechanical properties such as slip moduli and shear capacities were calculated. According to the test results, all connectors can be classified into two types, which owned st

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33

Yang, Keun-Hyeok, and Ju-Hyun Mun. "Cyclic Flexural and Shear Performances of Beam Elements with Longitudinal Glass Fiber Reinforced Polymer (GFRP) Bars in Exterior Beam-Column Connections." Applied Sciences 8, no. 12 (2018): 2353. http://dx.doi.org/10.3390/app8122353.

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The objective of this study is to examine the effect of the poor anchorage length of glass fiber reinforced polymer (GFRP) bars used for longitudinal reinforcement on the flexural and shear performances of beam elements in exterior beam–column connections made using high-strength materials. Six exterior beam–column connection specimens were tested under reversal cyclic loads applied at the free-end of the beam. The selected strength categories of materials in the beam element were as follows: 35 MPa and 70 MPa for the design compressive strength of concrete, 400 MPa and 600 MPa for the yield s

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34

Shatnawi, Amjed, Hana Mahmood Alkassar, Nadia Moneem Al-Abdaly, Emadaldeen A. Al-Hamdany, Luís Filipe Almeida Bernardo, and Hamza Imran. "Shear Strength Prediction of Slender Steel Fiber Reinforced Concrete Beams Using a Gradient Boosting Regression Tree Method." Buildings 12, no. 5 (2022): 550. http://dx.doi.org/10.3390/buildings12050550.

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For the design or assessment of concrete structures that incorporate steel fiber in their elements, the accurate prediction of the shear strength of steel fiber reinforced concrete (SFRC) beams is critical. Unfortunately, traditional empirical methods are based on a small and limited dataset, and their abilities to accurately estimate the shear strength of SFRC beams are arguable. This drawback can be reduced by developing an accurate machine learning based model. The problem with using a high accuracy machine learning (ML) model is its interpretation since it works as a black-box model that i

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35

Shatnawi, Amjed, Hana Mahmood Alkassar, Nadia Moneem Al-Abdaly, Emadaldeen A. Al-Hamdany, Luís Filipe Almeida Bernardo, and Hamza Imran. "Shear Strength Prediction of Slender Steel Fiber Reinforced Concrete Beams Using a Gradient Boosting Regression Tree Method." Buildings 12, no. 5 (2022): 550. http://dx.doi.org/10.3390/buildings12050550.

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For the design or assessment of concrete structures that incorporate steel fiber in their elements, the accurate prediction of the shear strength of steel fiber reinforced concrete (SFRC) beams is critical. Unfortunately, traditional empirical methods are based on a small and limited dataset, and their abilities to accurately estimate the shear strength of SFRC beams are arguable. This drawback can be reduced by developing an accurate machine learning based model. The problem with using a high accuracy machine learning (ML) model is its interpretation since it works as a black-box model that i

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36

Chakrawarthi, Vijayaprabha, Leon Raj Jesuarulraj, Siva Avudaiappan, et al. "Effect of Design Parameters on the Flexural Strength of Reinforced Concrete Sandwich Beams." Crystals 12, no. 8 (2022): 1021. http://dx.doi.org/10.3390/cryst12081021.

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Sandwich beams are preferable for aerostructure and marine structures due to their high mechanical strength, durability, stiffness, and fatigue resistance. This paper presents a study on the flexural behavior of sandwich beams made of self-compacting concrete comprising a polystyrene inner core with wire mesh reinforcement. The effect of the design parameters such as the inner core area, percentage of tension reinforcement, and wire mesh on the moment carrying capacity and failure modes of sandwich beams was analyzed. Ten beams were cast and tested to failure with simply supported end conditio

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37

Smarzewski, Piotr, and Renata Spaczyńska. "Analysis of limit state of reinforced high performance hybrid fiber concrete deep beams with openings." Budownictwo i Architektura 10, no. 1 (2012): 027–36. http://dx.doi.org/10.35784/bud-arch.2228.

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The article presents the analysis of the strength of reinforced deep beams with openings made of high performance hybrid fibre concrete – steel and polypropylene. We compared the results of the shear capacity of the analytically calculated values based on its own assessment of the theoretical capacity of the proposals deep beams members created by modifications of empirical formulas.

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Albasyouni, Wahbi, and Mohamed Radwan. "Flexural Performance of Concrete Structures Reinforced with Fiber Reinforced Polymer (FRP)." iRASD Journal of Energy & Environment 3, no. 1 (2022): 20–29. http://dx.doi.org/10.52131/jee.2022.0301.0022.

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ne of the most recent uses of FRP is to replace the use of steel in reinforced concrete structures. There are multiple reasons for deciding to choose FRP instead of steel such as their lightweight which can be quite beneficial to the design of buildings, high strength, and high flexibility. However, the initial use of this material was anticipated in the retrofitting of heritage buildings or any other damaged structures. There are several studies that concentrated on the use of FRP to enhance shear and flexural strength of concrete structures. However, limited studies concentrated on the effec

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Ni, Xiangyong, and Kangkang Duan. "Machine Learning-Based Models for Shear Strength Prediction of UHPFRC Beams." Mathematics 10, no. 16 (2022): 2918. http://dx.doi.org/10.3390/math10162918.

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Estimating shear strength is a crucial aspect of beam design. The goal of this research is to develop a shear strength calculation technique for ultra-high performance fiber reinforced concrete (UHPFRC) beams. To begin, a shear test database of 200 UHPFRC beam specimens is established. Then, random forest (RF) is used to evaluate the importance of influence factors for the shear strength of UHPFRC beams. Subsequently, three machine learning (ML)-based models, including artificial neural network (ANN), support vector regression (SVR), and eXtreme-gradient boosting (XGBoost), are proposed to com

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Jung, Ju-Seong, Jae-Won Jeong, and Kang-Seok Lee. "Structural Performance Degradation of Corrosion-Damaged Reinforced Concrete Beams Based on Finite Element Analysis." Applied Sciences 12, no. 4 (2022): 2090. http://dx.doi.org/10.3390/app12042090.

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The impact of the seismic performance of corrosion-damaged reinforced concrete (RC) members on the overall seismic performance of the entire RC structure must be investigated. Related research results provide important guidance for a more accurate seismic performance evaluation of RC structures with corroded members including beams and columns. However, currently available technologies for the seismic evaluation of existing RC structures do not consider the impact of reinforcement corrosion-induced deterioration on the seismic performance of RC members. The main focus of this study is on propo

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Liu, Zhengyu, Ali A. Semendary, and Brent M. Phares. "Numerical investigation on early age performance of ultra-high-performance concrete shear keys between an adjacent prestressed concrete box beams." Advances in Structural Engineering 25, no. 3 (2021): 511–21. http://dx.doi.org/10.1177/13694332211056111.

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Adjacent precast prestressed concrete box beam bridges have been widely utilized for decades and have shown satisfactory performance. However, significant issues regarding to the longitudinal shear key cracking have been noted by bridge maintenance personnel. The cracks are typically initiated at beam-shear key interfaces due to shrinkage and temperature and propagate due to applied load. Recently, ultra-high-performance concrete (UHPC) was employed in the shear keys with the anticipation to prevent joint cracking. Although the field-collected data at early age from bridge utilizing UHPC shear

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Wang, Wei, Xie-dong Zhang, Fa-xing Ding, and Xi-long Zhou. "Finite Element Analysis on Shear Behavior of High-Strength Bolted Connectors under Inverse Push-Off Loading." Energies 14, no. 2 (2021): 479. http://dx.doi.org/10.3390/en14020479.

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High-strength bolted shear connectors (HSBSCs), which can be demounted easily and efficiently during deconstruction, are recommended to replace the conventional steel studs in steel–concrete composite beams (SCCBs) to meet the requirements of sustainable development. The existing investigations on the behavior of HSBSCs mainly focus on the positive moment area of composite beams, in which the concrete slab is in compress condition. In this paper, a three-dimensional finite element model (FEM) was developed to investigate the performance of HSBSCs subjected to inverse push-off loading. Material

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Harbi, Nibras Abbas, and Amer F. Izzet. "Performance of Post-Fire Composite Prestressed Concrete Beam Topped with Reinforced Concrete Flange." Civil Engineering Journal 4, no. 7 (2018): 1595. http://dx.doi.org/10.28991/cej-0309198.

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The performance of composite prestressed concrete beam topped with reinforced concrete flange structures in fire depends upon several factors, including the change in properties of the two different materials due to fire exposure and temperature distribution within the composition of the composite members of the structure. The present experimental work included casting of 12 identical simply supported prestressed concrete beams grouped into 3 categories, depending on the strength of the top reinforced concrete deck slab (20, 30, and 40 MPa). They were connected together by using shear connecto

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Seckinli, Muhammed, and Musa Hakan Arslan. "Comparison of design and application criteria for various methods used in reinforced concrete beam strengthening." Global Journal of Arts Education 9, no. 1 (2019): 35–42. http://dx.doi.org/10.18844/gjae.v9i2.4028.

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The design of the buildings to the earthquakes is a very critical issue. Some of existing reinforced concrete buildings does not have sufficient performance in terms of earthquake. These buildings must be demolished or strengthened. Strengthening design is not a simple engineering account but requires deep knowledge of composite material behavior. In this study, the structural advantages and disadvantages of various strengthening types of reinforced concrete beams are investigated. In this scope, reinforced concrete jacketing, strengthening with steel plate, strengthening methods with fiber po

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Aksoylu, Ceyhun, Yasin Onuralp Özkılıç, Marijana Hadzima-Nyarko, Ercan Işık, and Musa Hakan Arslan. "Investigation on Improvement in Shear Performance of Reinforced-Concrete Beams Produced with Recycled Steel Wires from Waste Tires." Sustainability 14, no. 20 (2022): 13360. http://dx.doi.org/10.3390/su142013360.

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In parallel with the increase in vehicle sales worldwide, waste tires are becoming an increasing problem. The storage and disposal of these waste tires are critical environmental problems. Re-using these wastes in different areas instead of being disposed of is vital in preventing environmental pollution and creating new low-cost products. From this motivation, this paper investigates the properties of traditional reinforced-concrete beam with recycled steel wires (RSWT) obtained from the waste tires. RSWT were added to reinforced-concrete beam between 1% and 3% by weight with an increment of

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Kazemi, Mostafa, Mohammad Daneshfar, Yousef Zandi, et al. "Effects of the Concrete Strength and FRP Reinforcement Type on the Non-Linear Behavior of Concrete Deep Beams." Sustainability 14, no. 7 (2022): 4136. http://dx.doi.org/10.3390/su14074136.

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To provide sustainable reinforced concrete deep beams, the replacement of steel rebars by FRP rebars with high-chemical resistance is proposed by researchers. However, the effects of the concrete strength, top and web longitudinal reinforcements, and types of FRP flexural rebars on the non-linear performance of concrete deep beams have rarely been evaluated. This study numerically assessed the effects of the top and web longitudinal reinforcements and concrete strength on the non-linear behaviour of GFRP- and CFRP-strengthened concrete deep beams with various shear span-to-overall depth (a/h)

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Wani, Shoib Bashir, Sarvat Gull, Ishfaq Amin, and Ayaz Mohmood. "Analytical and experimental study on shear performance of RCC beam elements reinforced with PSWC rebars: a comparative study." Challenge Journal of Concrete Research Letters 11, no. 3 (2020): 53. http://dx.doi.org/10.20528/cjcrl.2020.03.002.

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Early distress in RCC (Reinforced Cement Concrete) structures in the recent times poses a major problem for the construction industry. It is found that in most of cases, distresses in reinforced concrete structures are caused by corrosion of rebar embedded in the concrete. The HYSD (High Yield Strength Deformed) rebars which are used to offer excellent strength properties is detrimental to durability due to action of ribs as stress concentrators. Nowadays, concept of PSWC rebars (plain surface with wave type configuration rebars, formerly known as C-bars/mild steel rebar with curvy profile) is

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Xiao, Tong-Liang, Hong-Xing Qiu, and Jia-Le Li. "Seismic Behaviors of Concrete Beams Reinforced with Steel-FRP Composite Bars under Quasi-Static Loading." Applied Sciences 8, no. 10 (2018): 1913. http://dx.doi.org/10.3390/app8101913.

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Steel-fiber reinforced polymer (FRP) composite bar (SFCB) is a new composite material with good corrosion resistance and designable post-yield stiffness. Substitution of steel bar with SFCB can greatly increase the durability and ultimate capacity associated with seismic performance. First, the method and main results of the experiment are briefly introduced, then a simplified constitutive model of composite bar material was applied to simulate the seismic behaviors of the concrete beams reinforced with SFCBs by fiber element modeling. The simulation results were found to be in good agreement

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Jang, Seok-Joon, Dae-Hyun Kang, Kyung-Lim Ahn, Wan-Shin Park, Sun-Woong Kim, and Hyun-Do Yun. "Feasibility of Using High-Performance Steel Fibre Reinforced Concrete for Simplifying Reinforcement Details of Critical Members." International Journal of Polymer Science 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/850562.

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This paper addresses the effects of hooked-end steel fibre contents on the mechanical properties of high-performance concrete (HPC) and investigates the feasibility of utilizing steel fibres to simplify the complicated reinforcement detailing of critical HPC members under high shear stress. Mechanical properties of HPCs with specified compressive strength of 60 and 100 MPa include the flow, air content, compressive strength, and flexural strength. The effectiveness of 1.50% steel fibre content on the shear behaviour of diagonally reinforced concrete coupling beam without additional transverse

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Smarzewski, Piotr. "Hybrid Fibres as Shear Reinforcement in High-Performance Concrete Beams with and without Openings." Applied Sciences 8, no. 11 (2018): 2070. http://dx.doi.org/10.3390/app8112070.

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The article presents the results of research work aimed at testing the use of hybrid steel-polypropylene fibre as a strengthening solution to upgrade reinforced high-performance concrete (HPC) beams with openings (BO1 ÷ BO3) and without (B1 ÷ B3). A total of six simply supported beams were tested under four-point bending. The test beams had a cross section of 200 × 400 mm and a total length of 2500 mm. Two square openings in each shear span were located symmetrically about the mid-point in three BO beams. Research was carried out with regard to the quantity and type of reinforcement. Beams B1

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