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Artykuły w czasopismach na temat „Concrete beams”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Zainurrahman, Eko Darma, and Sri Nuryati. "Carbon Fiber Reinforced Polymer Sebagai Perkuatan Lentur pada Balok Beton." BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil 8, no. 1 (2020): 20–28. http://dx.doi.org/10.33558/bentang.v8i1.1947.

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Concrete Beams can experience a sudden collapse when overload because of its brittle characteristic. The use of Carbon Fiber Reinforced Polymer (CFRP) on concrete beams externally as external confinement is predicted to improve concrete mechanics properties, increase the ductility and capacity of concrete, and the flexural strength of concrete beams. An experimental study on the reinforcement of concrete beams with Carbon Fiber Reinforced Polymer (CFRP) was carried out to estimate the effectiveness of CFRP on concrete structures as a concrete beam flexural reinforcement material. Two types of

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Du, Chuang, Wen Ling Tian, Xiao Wei Wang, and De Jun Wang. "Experimental Research on Ceramsite Concrete Beams." Applied Mechanics and Materials 166-169 (May 2012): 708–11. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.708.

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Six specimens, including 4 ceramsite concrete beams(one of beams mixed into the polypropylene fiber ) and 2 normal concrete beams, were tested to investigate the flexural behavior. The test results show that cracking load of ceramsite concrete beams is slightly smaller than the ordinary concrete beam and cracking load of ceramsite concrete beams has significantly improved after mixing into the polypropylene fibers. The ultimate load of ceramsite concrete beams are no less than ordinary concrete beam,and fibers have not effects on the increase of ultimate load. Load-deflection curves were compa

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3

Muhtar, Amri Gunasti, Suhardi, et al. "The Prediction of Stiffness of Bamboo-Reinforced Concrete Beams Using Experiment Data and Artificial Neural Networks (ANNs)." Crystals 10, no. 9 (2020): 757. http://dx.doi.org/10.3390/cryst10090757.

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Stiffness is the main parameter of the beam’s resistance to deformation. Based on advanced research, the stiffness of bamboo-reinforced concrete beams (BRC) tends to be lower than the stiffness of steel-reinforced concrete beams (SRC). However, the advantage of bamboo-reinforced concrete beams has enough good ductility according to the fundamental properties of bamboo, which have high tensile strength and high elastic properties. This study aims to predict and validate the stiffness of bamboo-reinforced concrete beams from the experimental results data using artificial neural networks (ANNs).

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4

Siew, Jia Ning, Qi Yan Tan, Kar Sing Lim, Jolius Gimbun, Kong Fah Tee, and Siew Choo Chin. "Effective Strengthening of RC Beams Using Bamboo-Fibre-Reinforced Polymer: A Finite-Element Analysis." Fibers 11, no. 5 (2023): 36. http://dx.doi.org/10.3390/fib11050036.

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This paper presents a finite-element model of the structural behaviour of reinforced concrete (RC) beams with and without openings externally strengthened with bamboo-fibre-reinforced composite (BFRC) plates. The simulation was performed using ABAQUS Unified FEA 2021HF8 software. The stress–strain relationship of the RC was modelled using a model code for concrete structures, whereas the concrete-damaged plasticity model was used to simulate concrete damage. The predicted crack pattern of the beams was comparable to that from experimental observations. The ultimate load-bearing capacity of RC

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5

Topark-Ngarm, Pattanapong, Trinh Cao, Prinya Chindaprasirt, and Vanchai Sata. "Strength and Behaviour of Small-Scale Reinforced High Calcium Fly Ash Geopolymer Concrete Beam with Short Shear Span." Key Engineering Materials 718 (November 2016): 191–95. http://dx.doi.org/10.4028/www.scientific.net/kem.718.191.

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The small-scale reinforced high calcium fly ash geopolymer concrete beams with short shear span were studied in this research. Reinforced concrete beams with 150x150 mm2 cross-section and 530 mm in length were used for tests. Conventional reinforced Portland cement concrete beams (RC) with designed concrete compressive strengths of 35, 45 and 55 MPa and high-calcium fly ash geopolymer reinforced concrete beams with similar strength were tested. The geopolymer concretes (GC) were designed with alkaline liquid to fly ash ratio (L/A) of 0.5, sodium silicate to sodium hydroxide (S/H) ratio of 1.0

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6

Zhang, Xizhi, Shaohua Zhang, and Sixin Niu. "Experimental studies on seismic behavior of precast hybrid steel–concrete beam." Advances in Structural Engineering 22, no. 3 (2018): 670–86. http://dx.doi.org/10.1177/1369433218796411.

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This study aims to investigate the seismic behavior of precast hybrid steel–concrete beams. Five full-scale beam specimens, including four precast hybrid steel–concrete beams and a conventional precast concrete beam, were tested under cyclic loading. Furthermore, a new connection form was proposed to facilitate the constructability of the steel-to-concrete connection. The main experimental parameters were the steel beam length and the longitudinal reinforcement ratio. In addition, the influence of the reduced beam section of the steel beam on seismic behavior of precast hybrid steel–concrete b

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7

Wibowo, Petrus Haryanto, and Dony Dony. "Comparative Study of Reinforced Concrete Beams in School Buildings Using Prestressed Concrete Beams." Journal of Civil Engineering and Planning 3, no. 2 (2022): 169–81. http://dx.doi.org/10.37253/jcep.v3i2.1237.

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Building construction in Indonesia generally uses concrete. The concrete used for building structures, such as beams, generally utilizes reinforced concrete. It is very rare to see the use of prestressed concrete for building structures such as beams, especially in Batam City. This study aims to analyze the comparison between the beam structure with reinforced concrete that has been existing and prestressed concrete in the Kaliban School project. The stages in this research included prestressed concrete beam design and comparative analysis. The design of prestressed concrete beams was planned

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8

Konin, D. V. "Rigidity of partially concreted steel beams and steelreinforced floors." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture 25, no. 3 (2023): 128–42. http://dx.doi.org/10.31675/1607-1859-2023-25-3-128-142.

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The use of steel-reinforced (composite) floor structures with partially concreted steel beams and prefabricated flooring elements is an effective solution in terms of reducing the material consumption and increasing the structural rigidity. The experimental results of partially concreted composite beams and beams as part of full-size ceilings are studied and analyzed herein. It is shown that the stiffness graph of simple steel-reinforced concrete beams of any shape can be divided into 3 stages: an initial stiffness drop, normal operation, and transition to the limit state with subsequent destr

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9

Gayathri, H. Thanya, R. Baskar, and N. Pannirselvam. "Experimental Investigation on Flexural Behaviour of Encased Cold Formed Steel Section in Reinforced Concrete Beams." Indian Journal Of Science And Technology 18, no. 23 (2025): 1873–81. https://doi.org/10.17485/ijst/v18i23.881.

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Objectives: This research investigates flexural behaviour by comparing the experimental findings of two sample specimens: encased Cold Formed Steel (CFS) concrete beams and conventional reinforced concrete beams. Understanding the failure modes seen in encased CFS is critical for developing a safe and efficient composite system. Methods: The flexural behaviour of CFS encased in typical concrete beams was assessed using Four Point Bending Test. Compressive strength, flexural strength, deflection, stiffness, failure modes, load-carrying capacity, and structural performance are determined by the

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10

Abbas, Rafaa Mahmood, and Rawah Khalid Rakaa. "Structural Performance of Lightweight Fiber Reinforced Polystyrene Aggregate Self-Compacted Concrete Beams." Engineering, Technology & Applied Science Research 13, no. 5 (2023): 11865–70. http://dx.doi.org/10.48084/etasr.6217.

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This study aims to investigate experimentally the flexural behavior of lightweight Self-Compacted Concrete (SCC) beams made by Expanded Polystyrene (EPS) concrete and reinforced with rebars and steel fibers. To achieve the aims of this study, seven simply supported EPS lightweight fiber-reinforced concrete beams were fabricated and tested up to failure to study the effects of EPS content and the volume fraction of the steel fibers on their flexural behavior. The tested specimens were divided into two groups with one additional reference beam to be cast without using EPS or steel fibers. In the

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11

Badawy, Amr H., Ahmed Hassan, Hala El-Kady, and L. M. Abd-El Hafez. "The Behavior of Reinforced and Pre-Stressed Concrete Beams under Elevated Temperature." International Journal of Engineering Research in Africa 47 (March 2020): 15–30. http://dx.doi.org/10.4028/www.scientific.net/jera.47.15.

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The behavior of unbounded post tension and reinforced concrete beams under elevated temperature was presented. The experimental work was consisted of two major phases. In the first phase, the objective was studying the mechanical performance of prestressed beam, prestressed beam with steel addition and reinforced concrete beams respectively were studied. In the second phase, the residual mechanical performance of prestressed beam, prestressed beam with steel addition and reinforced concrete beams under elevated 400oC, for 120 minutes durations. The failure mechanisms, ultimate load capacity, a

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12

Song, Xingyu, Yan Liu, Xiaodong Fu, Hongwei Ma, and Xiaolun Hu. "Experimental Study on Flexural Behaviour of Prestressed Specified Density Concrete Composite Beams." Sustainability 14, no. 22 (2022): 14727. http://dx.doi.org/10.3390/su142214727.

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To solve the problem of poor seismic resistance due to the disadvantages of traditional concrete composite beams, such as heavy self-weight in prefabricated buildings, prestressed specified-density concrete composite beams are proposed herein. First, a mix ratio test of specified-density concrete was performed. Second, five prestressed specified-density composite beams, a prestressed ordinary concrete composite beam, and a prestressed semi lightweight concrete cast-in-situ beam were tested. The influence of the precast concrete height, reinforcement ratio, and concrete materials on the failure

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13

Dong, Chun Min, Ke Dong Guo, and Jia Jia Sun. "A New Calculation Method for Cracking Width of Beam with High Strength Rebar." Advanced Materials Research 243-249 (May 2011): 415–18. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.415.

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With the application of high strength concrete and rebar, the influence of concrete strength on cracking width of reinforced concrete beam with high strength rebar is becoming more and more important. To investigate the effect of concrete strength on cracking width of reinforced concrete beam with high strength rebar, the experiment including 6 simply supported T-beams with high-strength rebar and 2 beams with ordinary-strength rebar have been made. Then the relevant specifications advised in Code for Design of Concreter Structure (GB50010-2002) are revised according to the experiment results

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14

Raad Shaker, Hussein, Layth A. Al-Jaberi, and Wissam AlSaraj. "Flexural behavior of steel fiber reinforced slag- based geopolymer concrete beams." Nexo Revista Científica 36, no. 06 (2023): 1049–61. http://dx.doi.org/10.5377/nexo.v36i06.17462.

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This study includes tested nine reinforced concrete beams. It’s designed to fail in flexural under two-point load. All beams are classified according to the type of concrete and the percentage of PVA into three groups. The first group including four reinforced geopolymer concrete beams with percent of PVA was 0.2 %; second group including four reinforced geopolymer concrete beams with percent of PVA was 0.75 % and third group including one reinforced normal concrete beam. The results showed when comparing the geopolymer concrete beam with the normal concrete beam, noticed that the ultimate str

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15

Popovych, M. M., and S. V. Kliuchnyk. "Features of the Stressed-Strain State of a Steel-Reinforced-Concrete Span Structure with Preliminary Bending of a Steel Beam." Science and Transport Progress, no. 1(97) (October 17, 2022): 80–87. http://dx.doi.org/10.15802/stp2022/265333.

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Purpose. The authors aim to determine the features of the operation of a steel-reinforced concrete span structure with beams reinforced with an I-beam, with their pre-stressing using the bending of a steel I-beam. Methodology. To manufacture a steel-reinforced concrete span structure, it was proposed to reinforce an I-beam with a camber, which is then leveled with the help of applied external loads. For practical convenience, the vertical external forces are replaced by horizontal forces that keep the metal I-beam in a deformed state and in this state it is concreted. After the concrete streng

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16

Saketh Raj, B., and M. Kanta Rao. "Flexural Performance of Sustainable Fly Ash Based Concrete Beams." IOP Conference Series: Earth and Environmental Science 1130, no. 1 (2023): 012021. http://dx.doi.org/10.1088/1755-1315/1130/1/012021.

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Abstract The demand for concrete is high due to its solid strength and flexibility. To produce more concrete requirement of cement is very large. The production of concrete releases CO2 into the atmosphere. This can lead to global warming. By including other substances that have a cementations tendency, cement consumption can be decreased. To lower the cement consumption in concrete, a variety of pozzolanic ingredients are being used. It is being investigated whether fly ash can replace cement. Flexural tests were performed on reinforced concrete beams with fly ash contents ranging from 0% to

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17

Rajaa, Nagham, Salam Alharishawi, and Hamid Faris. "Experimental study of shear stresses of solid and hollow concrete beams made with Waste Tire rubber." Journal of Applied Engineering Science 23, no. 2 (2025): 208–19. https://doi.org/10.5937/jaes0-52938.

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Numerous studies have suggested using alternative materials in concrete; waste tire rubber is one such item which has drawn a lot of interest. Furthermore, tire landfilling-one of the biggest ecological issues facing the planet in the near future can be avoided by reusing and recycling waste tire rubber. The rubber crumb waste is added to concrete mixtures at those percentage values of 0%, and 15% as substitute by coarse aggregate weight. This research investigates the Shear and Flexural Behaviour and Action of Reinforced Solid Recycled Rubber Concrete Beams (SRRCB) and Reinforced Hollow Recyc

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18

Thilagar, K., and S. Suresh Babu. "Analytical Study on Flexural Behaviour of Light Gauge Steel Corrugated Section Encased in Concrete." Journal of Physics: Conference Series 2040, no. 1 (2021): 012026. http://dx.doi.org/10.1088/1742-6596/2040/1/012026.

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Abstract Light gauge elements for integrated beams were used, and thin webs are typically needed in constructed beams’ economical design. However, the buckling problem may arise if the Web is fragile. This risk may be reduced by using thicker panels, web reinforcements, or web enhancements. The use of corrugated Web is a possible means of achieving adequate rigidity and shear resistance without hardeners. Analytical studies were conducted in this present work to study the bending behavior of the conventional beam and light-weight steel beam with corrugated, concrete enclosed Web. Analyzes of f

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19

Lam, T. Q. K., T. M. D. Do, V. T. Ngo, T. T. N. Nguyen, and D. Q. Pham. "Concrete grade change in the layers of three-layer steel fibre reinforced concrete beams." Journal of Achievements in Materials and Manufacturing Engineering 1, no. 102 (2020): 16–29. http://dx.doi.org/10.5604/01.3001.0014.6325.

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Purpose: Determine the state of stress-strain, formation and development cracks, three-layer beam diagrams of load-compression stress, load-tension stress, load-vertical displacement relationships with a change in concrete grade. Design/methodology/approach: This paper presents the results of an ANSYS numerical simulation analysis involving stress-strain state and cracking of the steel fiber concrete layers of three-layer reinforced concrete beams with the upper and lower layers. With a cross-section of 150x300 mm, a total span of 2200 mm and an effective length of 2000 mm, the middle is a nor

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20

Du, Hao, Shengnan Yuan, Tianhong Yu, and Xiamin Hu. "Experimental and Analytical Investigation on Flexural Behavior of High-Strength Steel-Concrete Composite Beams." Buildings 13, no. 4 (2023): 902. http://dx.doi.org/10.3390/buildings13040902.

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This research investigated the flexural behavior of high-strength steel (HSS)—concrete composite beams. The effect of concrete strength on the load-deflection behavior, flexural capacity, and ductility of HSS—concrete composite beams was investigated. Four full-scale HSS—concrete composite beam specimens were tested under static load. The test results demonstrate that the failure mode of HSS—concrete composite beams is flexural failure of the steel member and compression fracture of concrete at mid-span. The HSS—concrete composite beam exhibits good mechanical performance and deformation behav

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21

AL-Turaihi, Ali A. A., and Haider A. A. Al-Katib. "BEHAVIOR OF HYBRID REINFORCED CONCRETE BEAMS ON FLEXURAL STRENGTH." Kufa Journal of Engineering 15, no. 2 (2024): 27–38. http://dx.doi.org/10.30572/2018/kje/150203.

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The objective of this research is to experimentally study the flexural behavior of hybrid reinforced concrete beams. Three test beams, each with dimensions of (2200 X 150 X 240) mm, were fabricated for this purpose. The first beam was constructed using ordinary concrete, while the second beam consisted of two layers of high-strength concrete in the compression zone and normal concrete in the tension zone. The third beam was entirely cast using high-strength concrete. In terms of reinforcement, all beams were equipped with 2φ12 steel bars in the tension zone and 2φ12 steel bars in the compressi

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22

Chen, Xu Jun, Xiao E. Zhu, and Zhong Yang. "Study on Cracking Load of Normal Section for Concrete Beams Strengthened with BFRP Sheet." Applied Mechanics and Materials 578-579 (July 2014): 1343–46. http://dx.doi.org/10.4028/www.scientific.net/amm.578-579.1343.

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Based on the calculation method of cracking load for reinforced concrete beam, the formula to calculate cracking load of normal section for concrete beams strengthened with BFRP sheet is established. The cracking load experiment of seven concrete beams strengthened with BFRP and three concrete beams strengthened with CFRP is conducted, and the results showed that fiber sheet layers and fiber sheet types have little effect on cracking load of concrete beams strengthened, the cracking load of beams strengthened mainly depends on the strength of concrete. The comparison between estimated values a

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23

Cichorski, Waldemar. "Estimate of dynamic load capacity of reinforced concrete deep beam made of very high strength construction materials." Bulletin of the Military University of Technology 67, no. 4 (2018): 15–40. http://dx.doi.org/10.5604/01.3001.0012.8483.

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The paper presents an analysis of the dynamic load capacity of a dynamically loaded rectangular reinforced-concrete deep beam made of high-strength materials, including the physical nonlinearity of the construction materials: concrete and reinforcing steel. The solution was acquired with the use of the method presented in [15]. The dynamic load capacity of the reinforced concrete beam was determined. The results of numerical solutions are presented, with particular emphasis on the impact of the very high strength of concrete and steel on the reinforced concrete beam’s dynamic load capacity. Th

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24

Yan, Qiushi, Bowen Sun, Xuemei Liu, and Jun Wu. "The effect of assembling location on the performance of precast concrete beam under impact load." Advances in Structural Engineering 21, no. 8 (2017): 1211–22. http://dx.doi.org/10.1177/1369433217737119.

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With incorporation of assembling joints, precast concrete beams could behave very differently in resisting both static and dynamic loads in comparison to conventional reinforced concrete beams. With no research available on the dynamic behavior of precast concrete beams under impact load, a combined experimental and numerical study is conducted to investigate the dynamic response of precast concrete beams under impact load. The results were also compared with reinforced concrete beams. Four groups of concrete beams were tested with all beams designed with the same reinforcement, but different

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25

Wang, Zuohu, Zhanguang Gao, Yuan Yao, and Weizhang Liao. "Experimental investigation on the seismic behavior of concrete beams with prestressing carbon fiber reinforced polymer tendons." Science Progress 103, no. 1 (2019): 003685041988523. http://dx.doi.org/10.1177/0036850419885235.

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Seven prestressed concrete beams and one normal concrete beam were tested to study the seismic performance of concrete beams with prestressing carbon fiber reinforced polymer tendons. The failure modes, hysteretic curves, ductility, stiffness degeneration, and energy dissipation capacity were studied systematically. This study shows that the partial prestressing ratio is the main factor that affects the seismic performance of carbon fiber reinforced polymer prestressed concrete beams. The beam is more resilient to seismic loads as the partial prestressing ratio decreases. Under the same partia

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Surianinov, Mykola, and Marina Vyhnanets. "DEFORMABILITY AND CRACK RESISTANCE OF REINFORCED CONCRETE AND FIBER CONCRETE BEAMS." Spatial development, no. 6 (December 26, 2023): 227–38. http://dx.doi.org/10.32347/2786-7269.2023.6.227-238.

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The work presents the results of the study of deformability and crack resistance of reinforced concrete beams with additional steel fiber reinforcement. Beam samples of three series were produced (three in each series): series I ― beams made of ordinary concrete; II series ― steel-reinforced concrete beams; III series ― beams of combined section, in which the lower zone (0.5 from the height of the beam) is made of steel fiber concrete, and the upper zone is made of ordinary concrete. One sample of each series was made from one batch. At the same time, material samples were made from the same b

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Lam, Thanh Quang Khai, and Thi My Dung Do. "The Behavior of RC Beams Strengthened with Steel Fiber Concrete Layer by ANSYS Simulation." Advances in Civil Engineering 2023 (March 2, 2023): 1–17. http://dx.doi.org/10.1155/2023/4711699.

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In this study, a double-layer reinforced concrete beam structure was created for the purpose of repairing reinforced concrete beams by pouring a layer of concrete on top of the reinforced concrete beam and then adding fibers to the concrete. Take into consideration the bearing capacity of these double-layer concrete beams as well as the effects that the input parameters have on the stress strain, the propagation of cracks in reinforced concrete beams. The study looks at double-layered reinforced concrete beams, with the steel fiber concrete placed on top of the one containing the normal concre

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Mansur, Achmad Z., Rudy Djamaluddin, Herman Parung, Rita Irmawaty, and Daud Nawir. "Effectiveness of Grouting and GFRP Reinforcement for Repairing Spalled Reinforced Concrete Beams." Civil Engineering Journal 10, no. 7 (2024): 2144–61. http://dx.doi.org/10.28991/cej-2024-010-07-05.

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Corrosion of steel reinforcement from chloride exposure can compromise the strength of reinforced concrete structures. Rust formation expands, applying pressure on concrete, resulting in cracks and spalling. Prompt repair is crucial for severe cases of spalling. This research assessed the efficacy of repair strategies for reinforced concrete beams post-spalling, including grouting and different techniques involving Glass Fiber Reinforced Polymer (GFRP) reinforcement. The research examined four variations of reinforced concrete beams, each sized at 150 mm × 200 mm × 3300 mm. Results showed that

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Vasyl, Karpiuk, Tselikova Alina, Khudobych Artur, Karpiuk Irina, and Kostyuk Anatoly. "STUDY OF STRENGTH, DEFORMABILITY PROPERTY AND CRACK RESISTANCE OF BEAMS WITH BFRP." Eastern-European Journal of Enterprise Technologies 4, no. 7 (106) (2020): 42–53. https://doi.org/10.15587/1729-4061.2020.209378.

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Experimental data of strength, deformability, and crack resistance of 2,000×200×100 mm reinforced concrete and basalt-concrete beams are given. Longitudinal reinforcement consisted of 2 Ø14 A500C for reinforced concrete beams and 2 Ø14 BFRP (AKB800) for basalt-concrete beams. Transverse reinforcement consisted of 2 Ø3,4,5 ВрI for reinforced concrete beams and 2 Ø4,6,8 BFRP (АКБ800) for basalt-concrete beams. Beams were made of heavy concrete of C16/20, C30/35, and C40/50 classes. The experimental beam specimens were tested according to a four-point

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Słowik, Marta. "Analysis of fracture processes in reinforced concrete beams without stirrups." Frattura ed Integrità Strutturale 15, no. 57 (2021): 321–30. http://dx.doi.org/10.3221/igf-esis.57.23.

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The analysis of fracture processes which led to shear failure in reinforced concrete beams without transverse reinforcement was performed on the basis of test results from the author’s own experimental investigation and numerical simulations. The variable parameters during the experiment were a beam’s length and a shear span. It was observed that the character of failure in the beams depended on the beam’s length and the span-to-depth ratio. In slender beams characterized by the shear span-to-depth ratio 3.4 and 4.1, the formation of the critical diagonal crack caused a brittle, sudden failure

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Ghailan, Dhia B. "T-Beam Behavior In Flexure With Different Layers Of Concrete In Web And Flange." Kufa Journal of Engineering 2, no. 1 (2014): 54–63. http://dx.doi.org/10.30572/2018/kje/211287.

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This study presents an experimental investigation performed to investigate the behavior of reinforced concrete T-beams with different types of concrete in web and/or flange. More rational way has been used by strengthening the web and the flange by steel fiber reinforced concrete (SFRC) and strengthening the flange by high strength concrete (HSC). Tests were carried out on six beams, simply supported under a single point loading at mid-span. Two of which were made fully with normal strength concrete (NSC) as reference beams, and the others were made fully or partially with (SFRC) and (HSC) in

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Li, Shengyuan, Henglin Lv, Tianhua Huang, Zhigang Zhang, Jin Yao, and Xin Ni. "Degradation of Reinforced Concrete Beams Subjected to Sustained Loading and Multi-Environmental Factors." Buildings 12, no. 9 (2022): 1382. http://dx.doi.org/10.3390/buildings12091382.

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In the process of service, reinforced concrete structures have to bear both load and multi-environmental factors. The deterioration of reinforced concrete beams is critical to the durability, safety, and sustainability of reinforced concrete structures. The main aim of the present research is to determine the degradation mechanism of reinforced concrete beams subjected to sustained loading and multi-environmental factors. Reinforced concrete beam specimens were prepared, loaded and then exerted multi-environmental factors. At the end of each degradation period, the degradation of concrete (che

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Aulia, Teuku Budi, M. Zardan, Nora Abdullah, et al. "Use of Cement and Aggregates Substitution for Production of Hybrid Cost-Effective and Sustainable High-Strength Concretes." Key Engineering Materials 998 (December 13, 2024): 77–84. https://doi.org/10.4028/p-eb6rke.

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High-strength concretes made with a lot of cement and good quality aggregates added with additives and admixtures causing expensive costs. Conversely, cement manufacturing is not environment friendly due to using many natural raw materials and delivers CO2 to atmosphere triggering global warming. Moreover, aggregates availability deriving from river reduces over time, almost 60% of civil engineering infrastructures in world are made with concrete. The purpose of this research is to study effectiveness of using cement substitute materials derived from natural geopolymer pozzolanic ash and aggre

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Alrshoudi, Fahed. "Textile-Reinforced Concrete Versus Steel-Reinforced Concrete in Flexural Performance of Full-Scale Concrete Beams." Crystals 11, no. 11 (2021): 1272. http://dx.doi.org/10.3390/cryst11111272.

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The effectiveness of textile-reinforced concrete (TRC) and steel-reinforced concrete (SRC) in the flexural performance of rectangular concrete beams was investigated in this study. To better understand TRC behaviour, large-scale concrete beams of 120 × 200 × 2600 mm were tested and analysed in this work. Cover thickness, anchoring, and various layouts were all taken into consideration to assess the performance of beams. In addition, bi-axial and uni-axial TRC beams and SRC beams were classified according to the sort and arrangement of reinforcements. The findings showed that anchoring the text

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Abdullah, Adnan I., and Assim M. Lateef. "Innovative Method for Reinforcing Beams with Different Types of Concrete Using Cross-Rod Steel Bracing Under Pure Torsion." Civil Engineering Journal 10, no. 4 (2024): 1093–112. http://dx.doi.org/10.28991/cej-2024-010-04-06.

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This study aimed to investigate the effectiveness of an innovative way to reinforce the concrete beams using cross-rod steel bracing under pure torsion. The experimental program consists of casting and testing eighteen concrete beams made of three types of concrete in the form of three groups, with the same dimensions for all beams (200×200×2000) mm. The parameters of the study included concrete types (normal strength, high strength, and steel fiber), as well as the number of internally cross rods (4, 8, 12, 16, 20). The experimental results showed that the number of internally cross-rod reinf

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John, A. TrustGod, Douye Joshua, and S. Teminusi Orumu. "Investigation on the Actual Behaviour of a Reinforced Concrete Beam Occasioned by Abandonment." Journal of Scientific and Engineering Research 10, no. 2 (2023): 150–55. https://doi.org/10.5281/zenodo.10454011.

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<strong>Abstract </strong>This paper presents the results of an investigation into the actual behavior of a two-layer reinforced concrete beam occasioned by abandonment. Six (6) RC beams of 1100 x 100 x 150 mm, provided with 2ϕ10 and 2ϕ8 at the bottom and top, respectively, and ϕ6 mm at 225 mm spacing, were used as links. The beams were constructed with a 1:2:4 mix ratio and a 0.54 water-to-cement ratio. Two beams were used as control and were constructed with a single concrete layer, while the remaining beams were produced to different depths and abandoned for 28 days before being completed.

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Jiang, Yu Chen, Xia Min Hu, and Huai Dong Yan. "Experimental Investigation on Bending Performance of Steel-Concrete Composite Slim Beams." Key Engineering Materials 853 (July 2020): 182–86. http://dx.doi.org/10.4028/www.scientific.net/kem.853.182.

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In this paper, the mechanical behavior of steel-concrete composite slim beams was investigated by experiments, and the influence of sectional dimension of steel beams on the bending stiffness and flexural capacity of composite slim beams was evaluated. Test results show that good cooperative performance can be achieved in steel-concrete composite slim beams and the relative slip between steel and concrete is very small. The steel-concrete slim beam presents considerable deformation ability beyond the service stage, which indicates that the composite slim beam has good ductility. In addition, s

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Thang, Nguyen Truong, and Nguyen Hai Viet. "Simplified calculation of flexural strength deterioration of reinforced concrete T-beams exposed to ISO 834 standard fire." Journal of Science and Technology in Civil Engineering (STCE) - HUCE 15, no. 4 (2021): 123–35. http://dx.doi.org/10.31814/stce.huce(nuce)2021-15(4)-11.

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Reinforced concrete (RC) T-shaped cross-section beam (so-called T-beam) is a common structural member in buildings where beams and slabs are monolithically cast together. In this paper, a simplified calculation method based on Russian design standard SP 468.1325800.2019 is introduced to determine the flexural strength of RC T-beams when exposed to ISO 834 standard fire. The idea of 500oC isotherm method, which is stipulated in both Eurocodes (EC2-1.2) and SP 468, is applied associated with specifications of temperature distribution on T-beams’ cross sections and the temperature-dependent mecha

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Ren, Zhenhua, Yuzhu Wang, Wei Chen, Xiantao Zeng, and Xuanming Ding. "Research on the Shear Performance of Concrete Beams Strengthened with Lateral External Prestressing." Buildings 15, no. 9 (2025): 1482. https://doi.org/10.3390/buildings15091482.

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Urban renewal and improving the structural resilience of infrastructure are the hotspots of attention in all walks of life. The structural resilience of existing infrastructure and engineering structures is deteriorating with the increase in service life. In order to quickly improve the structural resilience and service life of existing engineering structures, a new method of rapid reinforcement for in-service concrete beams is proposed in this paper, which is the external prestressed reinforcement method of the side façade. The specific procedure involves creating a penetration hole at each e

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Djamaluddin, Rudy, Rita Irmawaty, Fakhruddin, and Kohei Yamaguchi. "Flexural Behavior of Repaired Reinforced Concrete Beams Due to Corrosion of Steel Reinforcement Using Grouting and FRP Sheet Strengthening." Civil Engineering Journal 10, no. 1 (2024): 222–33. http://dx.doi.org/10.28991/cej-2024-010-01-014.

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One of the common causes of damage to the concrete structures close to the sea line is corrosion on the steel reinforcement in the concrete, which may cause spalling on the concrete cover. This paper presents the results of the simulation of the corroded reinforced concrete beams, which were repaired using the grouting method and FRP strengthening. The concrete cover of the beam specimens on the tensile side was filled with grouted concrete instead of filled with normal concrete to simulate the repair of concrete spalling. Three types of beam specimens were prepared and tested under a monotoni

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Jaffal, Angham Nassar, Ameer A. Hilal, and Akram S. Mahmoud. "Behavior of Reinforced Composite Foamed-Normal Concrete Beams." Journal of Engineering 2023 (August 1, 2023): 1–11. http://dx.doi.org/10.1155/2023/3653472.

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A study has been undertaken to investigate the production and behavior of beams made with foamed, normal, and composite concrete and reinforced with different steel percentages (under, balanced, and over). Nine reinforcement beams, including three normal-weight concrete, three lightweight foamed concrete, and three composite concrete, were made with similar rectangular cross sections of dimensions (150 × 250 mm) and length of 1500 mm. A 28-day compressive strength of 29 MPa (suitable for structural purposes) was achieved for all investigated concrete mixes. Ultimate load, crack mode, ductility

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Badar, Sajjad abdulameer, Laith Shakir Rasheed, and Shakir Ahmed Salih. "The Structural Characteristics of Lightweight Aggregate Concrete Beams." Journal of University of Babylon for Engineering Sciences 27, no. 2 (2019): 64–73. http://dx.doi.org/10.29196/jubes.v27i2.2293.

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This paper aims to investigate the structural behavior of reinforced lightweight concrete beams. Attapulgite aggregate and crushed clay brick aggregate were used as coarse lightweight aggregate to produce structural lightweight aggregate concrete with 25 Mpa and 43.6 Mpa cube compressive strength and 1805 Kg/m3 and 1977 Kg/m3 oven dry density respectively. The result of reinforced lightweight concrete beams compared with reinforced normal weight concrete beams, which have 50.5 Mpa cylinder compressive strength and 2317 Kg/m3 oven dry density. For each type of concrete two reinforced concrete b

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Wang, Zhen Qing, Mu Qiao, Yu Lai Han, and Zhu Ju. "A Time-Variant Reliability Analysis of Reinforced Concrete Beams Working with Cracks under High Temperature." Applied Mechanics and Materials 197 (September 2012): 259–65. http://dx.doi.org/10.4028/www.scientific.net/amm.197.259.

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The reliability of a reinforced concrete beam has been largely discounted when it under the action of fire. For a more accurate description of concrete beams’ reliability, the impact of cracks in reinforced concrete beams has been taking into account. Concrete is divided into elastic zone and plastic zone to calculate its strength. A simple and feasible time-variant model of reliability index of reinforced concrete beams under fire has been given. The effect of ISO834 temperature rising curve on the reliability index of concrete beam at different time has been analyzed. The reliability of a re

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Liu, Can. "Shear Capacity Research on Transversely Reinforced Concrete Beams." Applied Mechanics and Materials 744-746 (March 2015): 283–87. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.283.

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Inner transverse prestressed bars were used to enhance the shear capacity of concrete beams in this paper, which can be used in transformer beams to reduce the sectional size. Two transversely prestressed one ordinary concrete beams were tested and calculated by finite element method, and the following conclusions can be drawn: (a)The shear capacity of transversely prestressed concrete beam increase rapidly with the increase of the prestressing force level, which means that prestressing force level has a great influence on the shear capacity of transversely prestressed concrete beam. (b) The t

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Zhao, Wei Jian, Jia Xin Tong, Shen Ming Yuan, and Ye Nan Guo. "Research Progress on Reinforced Concrete Composite Beam in China." Applied Mechanics and Materials 584-586 (July 2014): 939–43. http://dx.doi.org/10.4028/www.scientific.net/amm.584-586.939.

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Reinforced concrete composite beam plays a very important role in the precast concrete structure, composite beam research is critical. Based on the research results about it in China, on the one hand, from the traditional composite beams to the improved ones, the various kinds of composite beams were concluded; on the other hand, the applications of new building materials in the composite beams had been included, which included fiber reinforced cement-based composites, steel fiber reinforced concrete, reactive powder concrete and crumb rubber concrete. Through to the both related tests and the

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Salem, Ghada G., Vera V. Galishnikova, S. M. Elroba, Nikolai I. Vatin, and Makhmud Kharun. "Finite Element Analysis of Self-Healing Concrete Beams Using Bacteria." Materials 15, no. 21 (2022): 7506. http://dx.doi.org/10.3390/ma15217506.

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Deterioration or crack formation in concrete elements is a phenomenon that cannot be easily avoided, and it has a high cost of repair. A modern technology that needs wider study is the use of the bio-precipitation of calcium carbonate using bacteria to increase a structures’ capacity. The current research presents an analytical study on self-healing concrete beams using bacteria to enhance the beam’s capacity. A Finite Element Analysis on (ANSYS 15.0) was carried out to study the effect of the bacteria concentration (the weight of bacteria to cement weight 1%, 2%, and 3%), the type of bacteria

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Zhao, Dong Fu, Zuo Kai You, and Dong Dong Liu. "Experimental Investigation on Temperature Distribution of Reinforced Concrete Beam." Applied Mechanics and Materials 166-169 (May 2012): 1379–82. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.1379.

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To research the temperature field distribution of concrete beams, experiments on fire resistance of 6 reinforced concrete simple-supported beams were completed. Test results indicate that: the trends of the temperature field distribution in each section of beam are the same, but the difference of the values in each section is large; the larger section of beam is, the higher temperature of beam surface and the more slowly the heat transfer to the internal of beam, which shows the increase of concrete cover thickness can improve fire resistance of beams; After the fire, the gradient of temperatu

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Khan, Mohammad Iqbal, and Yassir M. Abbas. "Behavioral Evaluation of Strengthened Reinforced Concrete Beams with Ultra-Ductile Fiber-Reinforced Cementitious Composite Layers." Materials 16, no. 13 (2023): 4695. http://dx.doi.org/10.3390/ma16134695.

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In the literature, there is little information available regarding the behavior of composite beams made up of reinforced concrete (RC) and ultra-ductile fiber-reinforced concrete (UDFRC). In this study, UDFRC was examined for its effectiveness in enhancing the strength of RC beams. With a tensile strength of 4.35 MPa and a strain capacity of 2.5%, PVA-based UDFRC was prepared. The performance of 12 medium-sized reinforced concrete (RC) beams was measured under four-point flexural loading. The beams measured 1800 mm long, 150 mm wide, and 200–260 mm deep. The experimental program on beam specim

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Jomaah, Muyasser M., and Diyaree J. Ghaidan. "Energy Absorption Capacity Of Layered Lightweight Reinforced Concrete Beams With Openings In Web." Civil Engineering Journal 5, no. 3 (2019): 690. http://dx.doi.org/10.28991/cej-2019-03091279.

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This research presents the flexural behavior on reinforced concrete beam with transverse web opening constructed from layered concrete. The layered concrete combining normal concrete and lightweight aggregate concrete (LWC) are depended in present study. In the experimental program, 13 models of normal and layered reinforced concrete beams are tested under the effect of four-point loads. All beams had the same overall geometrical dimensions and main longitudinal top and bottom with internal diagonal reinforcement provided around the openings. One of the beam specimen is tested as control beam

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Jiang, Yuchen, Xiamin Hu, Wan Hong, Mingming Gu, and Weimin Sun. "Investigation on partially concrete encased composite beams under hogging moment." Advances in Structural Engineering 20, no. 3 (2016): 461–70. http://dx.doi.org/10.1177/1369433216654148.

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In order to investigate the mechanical behavior of the partially concrete encased composite beam under hogging moment, static loading tests were conducted on one conventional composite beam and three partially concrete encased composite beams. The results show that partially concrete encased composite beams have higher stiffness and flexural capacity under hogging moment as compared with conventional composite beams. It is also found that the concrete encasement is able to enhance the local bucking resistance of the steel beam and effectively reduces the propagation speed of crack width under

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