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Artykuły w czasopismach na temat „Concrete beams Testing”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 31 stycznia 2023

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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 (January 15, 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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Muhtar, Amri Gunasti, Suhardi, Nursaid, Irawati, Ilanka Cahya Dewi, Moh Dasuki, et al. "The Prediction of Stiffness of Bamboo-Reinforced Concrete Beams Using Experiment Data and Artificial Neural Networks (ANNs)." Crystals 10, no. 9 (August 27, 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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Michalek, Peter, Jakub Kralovanec, and Jan Bujnak. "Composite Steel and RPC Testing." Pollack Periodica 15, no. 3 (November 7, 2020): 144–49. http://dx.doi.org/10.1556/606.2020.15.3.14.

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Reactive powder concretes are a set of ultrahigh-strength concrete reinforced with fibers. Their compressive strength is greater than 100 MPa. For assuring connection of steel beams and a concrete slab, steel stud connectors are used. The investigation of that kind of shear connection efficiency, in the case of this higher strength concrete deck using standard push-out test specimens has been executed. The experimental results are presented in the paper.

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Aparicio, Angel C., Gonzalo Ramos, and Juan R. Casas. "Testing of externally prestressed concrete beams." Engineering Structures 24, no. 1 (January 2002): 73–84. http://dx.doi.org/10.1016/s0141-0296(01)00062-1.

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Sunar Bükülmez, Pınar, and Oguz C. Celik. "Pre and post-fire mechanical properties of structural steel and concrete in steel-concrete composite cellular beams." MATEC Web of Conferences 282 (2019): 02054. http://dx.doi.org/10.1051/matecconf/201928202054.

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This paper presents an experimental investigation into possible variations of mechanical properties of structural steel and concrete in composite cellular beams exposed to ISO 834 fire and cooled down phases. Four full-scale fire tests were performed on protected and unprotected beams under assumed service loads. Tensile stress-strain behavior of steel coupons taken from the beams and compressive strengths of concrete cores taken from the reinforced concrete slabs are studied. Material coupon tests for steel are carried out as per TS EN ISO 6892-1. As for the concrete, compression tests were c

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6

Jiang, De Bao, and Xiao Jing Gu. "Test Research of Prestressed Concrete Beams with CFRP under Low Cyclic Loading." Advanced Materials Research 163-167 (December 2010): 3848–52. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.3848.

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Through testing it is obtained that force and the damage that 1 root structure of prestressed concrete beams strengthened and 3 different layers CFRP reinforced stickup prestressed concrete beams under cyclic loading. This test results show that CFRP reinforcement effect of prestressed concrete beams is obvious, and at the same time the cracking of prestressed concrete beam has also has certain reinforcement effect; But the CFRP reinforcement effect is proportional to the number of layers.

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7

Newtson, Craig M., Gaur P. Johnson, and Brian T. Enomoto. "Fundamental Frequency Testing of Reinforced Concrete Beams." Journal of Performance of Constructed Facilities 20, no. 2 (May 2006): 196–200. http://dx.doi.org/10.1061/(asce)0887-3828(2006)20:2(196).

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Motter, Christopher J., David C. Fields, John D. Hooper, Ron Klemencic, and John W. Wallace. "Steel-Reinforced Concrete Coupling Beams. I: Testing." Journal of Structural Engineering 143, no. 3 (March 2017): 04016191. http://dx.doi.org/10.1061/(asce)st.1943-541x.0001670.

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Jesse, S. Margaret, and V. M. Shanthi. "Investigating the Load–Deflection of FRP Material in Concrete Beams Wrapped with CFRP in Universal Testing Machine (UTM)." Journal of Computational and Theoretical Nanoscience 15, no. 2 (February 1, 2018): 744–51. http://dx.doi.org/10.1166/jctn.2018.7155.

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Strengthening Reinforced Concrete (RC) beams using FRP laminate becomes one of the main strengthening techniques. Failure of these beams is usually controlled by the bond strength between the laminate and the concrete. This paper presents the results of experimental investigation on six reinforced concrete beams, with various types, which were tested under two-point loading. The aim of the work was to study the efficacy of Carbon Fiber Reinforced Polymer (CFRP) sheets in enhancing the beam strength and stiffness from shear failure or flexural failure. The strengthening and deflection of the be

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10

Buller, A. H., M. Oad, and B. A. Memon. "Flexural Behavior of Reinforced RAC Beams Exposed to 1000°C Fire for 18 Hours." Engineering, Technology & Applied Science Research 9, no. 3 (June 8, 2019): 4225–29. http://dx.doi.org/10.48084/etasr.2733.

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In order to meet the socio-economic demands around the globe, construction industry not only consumes concrete at a very fast pace but also yields huge amounts of construction and demolishing waste. The phenomenon gives rise to environmental issues due to production of concrete ingredients and due to dumping of the waste. Therefore, one of the solutions is the production of green concrete utilizing demolished waste. This research work studies the effect of prolonged fire (18 hours) on the flexural behavior of reinforced concrete–recycled aggregate beams. The beams were using 50% replacement of

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11

Wang, Wei, Xin Zeng, Emery Niyonzima, Yue-Qing Gao, Qiu-Wei Yang, and Shao-Qing Chen. "Size Effect of Shear Strength of Recycled Concrete Beam without Web Reinforcement: Testing and Explicit Finite Element Simulation." Sustainability 13, no. 8 (April 13, 2021): 4294. http://dx.doi.org/10.3390/su13084294.

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Recycled concrete is a form of low-carbon concrete with great importance. The explicit finite element method is an economical and feasible method for analyzing static concrete structures, such as those made of recycled concrete. The shear strength of regular concrete beams has size effects. In this study, a group of physical tests on the size effect of the shear strength of recycled concrete beams without web reinforcement was carried out under the condition of a constant shear span ratio. The research results show that the shear strength of the test beam generally decreases with the increase

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12

Yang, Yong Xin, Wei Zhang, Zeng Wei Guan, and Wei Xie. "Numerical Analysis of RC Beams Strengthened with Pre-Stressed CFRP Sheets." Advanced Materials Research 255-260 (May 2011): 3101–5. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.3101.

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Through the finite element analysis software, fourteen strengthened beams are calculated in the condition of considering bonding-slip or not respectively. Comparing simulation results with test and theoretical calculation, We can draw the following conclusions: Testing reinforced concrete beams when there is no debonding, ANSYS simulation, theoretical calculations and experimental results agree well. Testing reinforced concrete beams when there is debonding. By considering the bond-slip calculation model calculation accuracy is higher. .Numerical results show that, prestressed CFRP with relati

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13

Alnahhal, Wael, and Omar Aljidda. "Effect of Fiber Volume Fraction on Behavior of Concrete Beams Made with Recycled Concrete Aggregates." MATEC Web of Conferences 253 (2019): 02004. http://dx.doi.org/10.1051/matecconf/201925302004.

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This study investigates the effect of using different volume fractions of basalt macro fibers (BMF) on the flexural behavior of concrete beams made with 100% recycled concrete aggregates (RCA) experimentally. A total of 4 reinforced concrete (RC) beam specimens were flexural tested until failure. The parameter investigated included the BMF volume fraction (0%, 0.5%, 1%, and 1.5%). The testing results of the specimens were compared to control beam specimen made with no added fibers. The experimental results showed that adding BMF improves the flexural capacity of the tested beams.

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14

Das, P. C., J. S. Owen, B. J. Eccles, M. A. Woodings, and B. S. Choo. "Role of Dynamic Testing in Assessment of Bridges." Transportation Research Record: Journal of the Transportation Research Board 1594, no. 1 (January 1997): 115–24. http://dx.doi.org/10.3141/1594-12.

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Six reinforced concrete beams were loaded incrementally up to failure. After each increment the load was removed and measurements of the modal properties of the beams were made by impulse testing. The variation of the natural frequencies, frequency ratios, mode shapes, and the level of damage were investigated. It was found that on completion of the tests the natural frequencies of the beams had been reduced by an average of 25 percent in each mode. However, changes in mode shape were very small, and appreciable differences were only observed when the damage was highly localized. Modeling of t

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15

Protchenko, Kostiantyn. "Residual Fire Resistance Testing of Basalt- and Hybrid-FRP Reinforced Concrete Beams." Materials 15, no. 4 (February 17, 2022): 1509. http://dx.doi.org/10.3390/ma15041509.

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The fire resistance of fiber-reinforced polymer reinforced concrete (FRP-RC) elements depends on the temperature performance of the original concrete member, the fire scenario, and FRP reinforcement behavior. In this study, fire resistance tests are described, along with the characteristics obtained during and after applying elevated temperatures, simulating the effects of fire. The tested beams were reinforced with basalt (BFRP) bars and with a hybrid composite of carbon fibers and basalt fibers (HFRP) bars. Fire tests were performed on full-scale beams, in which the midsections of the beams

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16

Elbasha, Nuri Mohamed. "Reinforced HSC Beams." Key Engineering Materials 629-630 (October 2014): 544–50. http://dx.doi.org/10.4028/www.scientific.net/kem.629-630.544.

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The primary long and short term advantages of high strength concrete are, low creep and shrinkage, higher stiffness, higher elastic modulus, higher tensile strength, higher durability (resistance to chemical attacks) and higher shear resistance. In addition, high strength concrete reduces the size of the member, which in turn reduces the form size, concrete volume, construction time, labor costs and dead load. Reducing the dead load reduces the number and size of the beams, columns and foundations. Thus there is a positive impact on reduction of maintenance and repair costs and an increase in

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17

MORDOVSKY, Sergey S., Nikolay A. ILYIN, Denis A. PANFILOV, Valeriya N. TALANOVA, and Yana A. BUZOVSKAYA. "METHOD OF MODELING A REINFORCED CONCRETE BEAM WITH DOUBLE REINFORCEMENT FOR STRENGTH, DEFORMATION AND FIRE RESISTANCE." Urban construction and architecture 9, no. 1 (March 15, 2019): 4–9. http://dx.doi.org/10.17673/vestnik.2019.01.1.

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The article presents a new technical solution, which relates to the field of construction, in particular, to the testing of bending reinforced concrete elements - building beams for strength, deformation and fire resistance on a scale model. The new method of solution implies an increase in the information content, visual clarity and depth of experimental studies of reinforced concrete beams as a result of using the cost-effective way of designing geometric and forceful similarity to the scale model of reinforced concrete beams for strength, deformation and fire resistance. The proposed method

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18

Sagaydak, A. I., V. V. Bardakov, S. V. Elizarov, and V. I. Ivanov. "STANDARDS FOR THE TECHNICAL STATE TESTING OF REINFORCED CONCRETE STRUCTURES BY MEANS OF ACOUSTIC EMISSION METHOD." Kontrol'. Diagnostika, no. 264 (June 2020): 32–39. http://dx.doi.org/10.14489/td.2020.06.pp.032-039.

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The review of 3 standards in the field of concrete and reinforced concrete acoustic emission testing, developed and issued by International Organization for Standardization in 2019 is provided in the article. The first standard describes the process of acoustic emission signals measuring in concrete and reinforced concrete. The second standard describes test method for damage qualification of reinforced concrete beams. This standard allows dividing the damage degree of reinforced concrete beams into 3 groups: minor, intermediate, heavy. The third standard describes method for active cracks cla

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Sagaydak, A. I., V. V. Bardakov, S. V. Elizarov, and V. I. Ivanov. "STANDARDS FOR THE TECHNICAL STATE TESTING OF REINFORCED CONCRETE STRUCTURES BY MEANS OF ACOUSTIC EMISSION METHOD." Kontrol'. Diagnostika, no. 264 (June 2020): 32–39. http://dx.doi.org/10.14489/td.2020.06.pp.032-039.

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The review of 3 standards in the field of concrete and reinforced concrete acoustic emission testing, developed and issued by International Organization for Standardization in 2019 is provided in the article. The first standard describes the process of acoustic emission signals measuring in concrete and reinforced concrete. The second standard describes test method for damage qualification of reinforced concrete beams. This standard allows dividing the damage degree of reinforced concrete beams into 3 groups: minor, intermediate, heavy. The third standard describes method for active cracks cla

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20

Madjlessi, Noosha, Demitrios M. Cotsovos, and Mojtaba Moatamedi. "Drop‐weight testing of slender reinforced concrete beams." Structural Concrete 22, no. 4 (May 5, 2021): 2070–88. http://dx.doi.org/10.1002/suco.202000395.

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21

Lindberg, Ralf, Nina Lindberg, Anssi Laaksonen, and Ilkka Vilonen. "Testing of Full Scale Pre-Stressed Concrete Beams." IABSE Symposium Report 100, no. 3 (June 1, 2013): 170–76. http://dx.doi.org/10.2749/222137813807018881.

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22

Gong, Bingnian, and Bahram M. Shahrooz. "Concrete-Steel Composite Coupling Beams. I: Component Testing." Journal of Structural Engineering 127, no. 6 (June 2001): 625–31. http://dx.doi.org/10.1061/(asce)0733-9445(2001)127:6(625).

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23

Abdulazeez Abdulridha, Aseel, Sura Amoori Abbas, Lubna Salim Danha, and Zainab Hassan Shaker. "Flexural Behavior of the Layered Beams Containing Reactive Powder Concrete and Self-Compacting Concrete." Journal of Engineering and Technological Sciences 54, no. 3 (May 20, 2022): 220302. http://dx.doi.org/10.5614/j.eng.technol.sci.2022.54.3.2.

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Reactive powder concrete (RPC) possesses superior structural and mechanical characteristics. Despite these excellent properties, the main drawback of RPC is that it is a very costly material. This study included an experimental program for studying the flexural behavior of hybrid beams containing RPC together with self-compacting concrete (SCC) in the same section. Five specimens with dimensions of 100 x 150 x 1000 mm were investigated. The first crack load, ultimate load, maximum deflection, load-deflection response, and crack pattern were investigated. The experimental program included testi

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Braimah, Abass, Mark F. Green, and T. Ivan Campbell. "Fatigue behaviour of concrete beams post-tensioned with unbonded carbon fibre reinforced polymer tendons." Canadian Journal of Civil Engineering 33, no. 9 (September 1, 2006): 1140–55. http://dx.doi.org/10.1139/l06-063.

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Much research has been conducted in the past decade to evaluate the suitability of fibre reinforced polymer (FRP) reinforcement in concrete structures. Most of the research has concentrated on the short-term performance of FRP prestressed and reinforced concrete beams. Only a limited amount of research has considered the fatigue behaviour of FRP prestressed beams. This paper presents an experimental research program designed to examine the fatigue behaviour of unbonded carbon fibre reinforced polymer (CFRP) post-tensioned concrete beams. The fatigue test program consisted of five large-scale (

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Omeman, Z., M. Nehdi, and H. El-Chabib. "Experimental study on shear behavior of carbon-fiber-reinforced polymer reinforced concrete short beams without web reinforcement." Canadian Journal of Civil Engineering 35, no. 1 (January 2008): 1–10. http://dx.doi.org/10.1139/l07-080.

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Recent literature emphasized the scarcity of information on the shear behavior of fiber-reinforced polymer (FRP) reinforced concrete short beams and the need to develop sufficient experimental data in this area. The present study responds to this need by conducting shear force testing on eight concrete short beams reinforced with carbon-fiber-reinforced polymer (CFRP) and four control concrete beams reinforced with steel. To ensure a shear failure, all tested beams were reinforced with only bottom longitudinal reinforcement and no web reinforcement was provided. The crack pattern, reinforcemen

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26

Liu, Tongxu, and Jean-Philippe Charron. "Shear strengthening of concrete T-beams with lateral layers of UHPC." MATEC Web of Conferences 364 (2022): 04016. http://dx.doi.org/10.1051/matecconf/202236404016.

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Concrete T-beams are commonly used in building slab systems and bridge decks. They may require strengthening in shear when they are deteriorated or when loading requirements increased. This research project studied the shear behaviour of concrete T-beams using cast-in-place Ultra High-Performance Concrete (UHPC) layers as a lateral strengthening method avoiding beam depth modification. Three UHPC strengthened beams together with one reference reinforced concrete beam were tested in monotonic three-point bending. Parameters investigated include the thickness of UHPC layers and the presence of s

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Yang, Qiuwei, Xi Peng, and Yun Sun. "Shear Capacity Evaluation of the Recycled Concrete Beam." Materials 15, no. 10 (May 21, 2022): 3693. http://dx.doi.org/10.3390/ma15103693.

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Compared with traditional concrete beams, recycled concrete beams are more prone to cracking and shear failure. Generally, shear failure is a brittle failure and its failure consequences are often very serious. Thus, the shear capacity is an important parameter in the design and testing for beam structures. In this work, the computation method and size effect on shear capacity of recycled concrete beams without stirrups are studied. Four recycled aggregate concrete beams with different sizes are tested by the bending experiment to obtain their ultimate shear capacities. By keeping the shear sp

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Tamil Selvi, M., and T. S. Thandavamoorthy. "Load-Deflection Characteristics Of Steel, Polypropylene And Hybrid Fiber Reinforced Concrete Beams." Archives of Civil Engineering 61, no. 1 (March 1, 2015): 59–72. http://dx.doi.org/10.1515/ace-2015-0004.

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AbstractConcrete is the most widely used construction material because of its specialty of being cast into any desired shape. The main requirements of earthquake resistant structures are good ductility and energy absorption capacity. Fiber reinforced concrete possesses high flexural and tensile strength, improved ductility, and high energy absorption over the conventional concrete in sustaining dynamic loads. The aim of this paper is to compare the properties of concrete beams in which three types of fibers are added individually. Steel fibers, polypropylene fibers and hybrid fibers were added

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Chen, Li Hua, Fei Xiao, and Qi Liang Jin. "Research on Key Issues in Design of Outer-Plated Steel-Concrete Continuous Composite Beams." Applied Mechanics and Materials 166-169 (May 2012): 414–19. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.414.

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Based on the theoretical analysis and testing results, some key issues in design of outer-plated steel-concrete continuous composite beams are discussed. The influence of the form of steel beam upper flange on the behavior of composite beam is analyzed. The requirements about longitudinal reinforcement strength in the concrete flange of the negative moment region are given. It is suggested that the moment-shear interaction should be neglected when calculating the flexural capacity of outer-plated steel-concrete composite beams under negative bending moment. The behavior of longitudinal shear r

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Lei, Guang Yu, Chang Hong Wu, and Shi Ming Li. "Testing Research for Deformation and Rigidity of Lightweight Aggregate Reinforced Concrete Beams under Fatigue Loading." Applied Mechanics and Materials 204-208 (October 2012): 3123–27. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.3123.

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Through the experiment of eight lightweight aggregate reinforced concrete beams under static loading and fatigue loading with constant amplitudes, the deformation rule under fatigue loading was analysed, the rigidity calculation means and formulations of lightweight aggregate reinforced concrete beam under fatigue loading were also discussed.

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Raju, Sumathy, Jagadheeswari Rathinam, Brindha Dharmar, Sasi Rekha, Siva Avudaiappan, Mugahed Amran, Kseniia Iurevna Usanova, Roman Fediuk, Pablo Guindos, and Ramkumar Velayutham Ramamoorthy. "Cyclically Loaded Copper Slag Admixed Reinforced Concrete Beams with Cement Partially Replaced with Fly Ash." Materials 15, no. 9 (April 25, 2022): 3101. http://dx.doi.org/10.3390/ma15093101.

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Generally, the concrete with higher strength appears to produce brittle failure more easily. However, the use of mineral admixture can help in enhancing the ductility, energy dissipation, and seismic energy in the designed concrete. This paper presents energy absorption capacity, stiffness degradation, and ductility of the copper slag (CS) admixed reinforced concrete with fly ash (FA) beams subjected to forward cyclic load. The forward cyclic load was applied with the help of servo-hydraulic universal testing machines with 250 kN capacity. Twenty-four beams with a size of 100 mm × 150 mm × 170

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Raju, Sumathy, Jagadheeswari Rathinam, Brindha Dharmar, Sasi Rekha, Siva Avudaiappan, Mugahed Amran, Kseniia Iurevna Usanova, Roman Fediuk, Pablo Guindos, and Ramkumar Velayutham Ramamoorthy. "Cyclically Loaded Copper Slag Admixed Reinforced Concrete Beams with Cement Partially Replaced with Fly Ash." Materials 15, no. 9 (April 25, 2022): 3101. http://dx.doi.org/10.3390/ma15093101.

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Generally, the concrete with higher strength appears to produce brittle failure more easily. However, the use of mineral admixture can help in enhancing the ductility, energy dissipation, and seismic energy in the designed concrete. This paper presents energy absorption capacity, stiffness degradation, and ductility of the copper slag (CS) admixed reinforced concrete with fly ash (FA) beams subjected to forward cyclic load. The forward cyclic load was applied with the help of servo-hydraulic universal testing machines with 250 kN capacity. Twenty-four beams with a size of 100 mm × 150 mm × 170

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Tampubolon, Sudarno P. "Analisa Perilaku Pushover pada Pengujian Balok Beton Bertulang." Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil 10, no. 1 (January 7, 2022): 77–88. http://dx.doi.org/10.33558/bentang.v10i1.3078.

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Beams are part of the building structure that is important to consider when designing the structure. Some failures that occur in beams due to beam reinforcement are not installed such as planning/ design procedures, this problem can cause structural failure. Knowing the behavior of the beam structure due to the given load can help predict the strength of the structural beam and the comfort of the planned structure. To determine and predict the strength and comfort of the reinforced concrete beam structure due to the received load, experimental and simulation tests are carried out. VecTor2 simu

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Yi, Wei Jian, and Yan Mei Lv. "Experimental Study on Shear Failure of High-Strength Concrete Beams with High-Strength Stirrups." Key Engineering Materials 400-402 (October 2008): 857–63. http://dx.doi.org/10.4028/www.scientific.net/kem.400-402.857.

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19 RC beams with shear span-to-depth equal to 3 were tested under a stiff testing facility, and complete load-deflection curves including the post-peak branch were obtained. Based on the test results the effects of concrete strength, stirrups strength, inclined stirrup angle, the amount of longitudinal reinforcement on failure mode, shear ductility index and shear capacity were analyzed. The test results were compared with the shear design approaches of Chinese Code and American Code. The results indicate that the shear failure of beam with appropriate web reinforcement has finite ductility. H

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Smarzewski, Piotr, Justyna Poręba, and Agata Rentflejsz. "Experimental testing of high performance fibre reinforced concrete deep beams." Budownictwo i Architektura 10, no. 1 (June 11, 2012): 015–26. http://dx.doi.org/10.35784/bud-arch.2227.

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The article presents the results of testing reinforced deep beams made of high performance concrete and fibre-concrete in the scheme of centrally placed load. The test was conducted for three deep beam elements of the of the main reinforcement bars in the form of lower, upper, horizontal and vertical stirrups in support areas of alternative reinforcement grids or steel and polypropylene fibers between the points of support elements. Analysis of results was based on the maps of major strains, the relations of force in the function of time and the relations of vertical displacements of the lengt

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Zhou, Yunlong, Zhinian Yang, Zhiguo You, Xingguo Wang, Kaijiang Chen, Boyu Guo, and Kai Wu. "Experimental Study on Fire Resistance of Concrete Beams Made with Iron Tailings Sand." Buildings 12, no. 11 (October 28, 2022): 1816. http://dx.doi.org/10.3390/buildings12111816.

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In order to measure the effect of iron tailings sand replacing natural sand on the fire resistance of concrete beams, five full-scale iron tailings sand concrete (ITSC) beams and two natural sand concrete (NSC) beams were conducted to fire testing under dead load and rising temperature conditions. The section temperature field, mid-span displacement, failure form, and fire resistance limit of ITSC beams under fire were analyzed. The main influence factors included different ISTC strengths (C30 and C40) and constraints. The analysis results were compared with those of NSC beams. The results sho

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M S, Latha, Revanasiddappa M, and Naveen Kumar B M. "Influence of stirrup spacing on shear resistance and deformation of reinforced concrete beams." International Journal of Engineering & Technology 7, no. 1 (February 3, 2018): 126. http://dx.doi.org/10.14419/ijet.v7i1.9013.

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An experimental investigation was carried out to study shear carrying capacity and ultimate flexural moment of reinforced cement concrete beam. Two series of simply supported beams were prepared by varying diameter and spacing of shear and flexural reinforcement. Beams of cross section 230 mm X 300 mm and length of 2000 mm. During testing, maximum load, first crack load, deflection of beams were recorded. Test results indicated that decreasing shear spacing and decreasing its diameter resulted in decrease in deflection of beam and increase in bending moment and shear force of beam.

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Novak, Josef, and Alena Kohoutkova. "Optimization of Pretensioned Steel Fiber Reinforced Concrete Beam." Advanced Materials Research 1106 (June 2015): 94–97. http://dx.doi.org/10.4028/www.scientific.net/amr.1106.94.

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Pretensioned concrete beams are used as a main load bearing member for composite bridges with a span to 30 m. The advantage of longitudinal prefabrication technology of beams for small span bridges is quick installation, savings of straight supporting scaffolding of centers and formwork. The amount of labour with formwork, reinforcement and concrete including work with scaffolding of centers on site is reduced at a minimum. During searching applications of steel fiber reinforced concrete (SFRC) suitable for this kind of structure a pretensioned concrete beam suitable for a bridge bay with a sp

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Mohammed, Ihtesham Hussain, Ahmed Majid Salim Al Aamri, Shakila Javed, and Yahya Ubaid Al Shamsi. "A Comparative Investigation on Normal and High Strength Concrete Beams under Torsion." Materials Science Forum 1048 (January 4, 2022): 359–65. http://dx.doi.org/10.4028/www.scientific.net/msf.1048.359.

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In this study, an experimental investigation was done to study the behaviour of Normal Strength Concrete (NSC) and High Strength Concrete (HSC) Plain beams under torsion with the concrete mix of M40 and M100. No mineral admixtures are used to obtain the required strength of concrete. Eight NSC beams and eight HSC beams whose width was varying with 75 mm, 100 mm, and 150 mm; depth varying as 75 mm, 100 mm, 150 mm and 200 mm; and span of the beams varying 600 mm, 800 mm and 1200 mm were casted and cured to stud the effect of torsion. The principle aim of this study was to understand the torsiona

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Abdulhameed, Ali Adel, and AbdulMuttalib Issa Said. "Behaviour of Segmental Concrete Beams Reinforced by Pultruded CFRP Plates: An Experimental Study." Journal of Engineering 25, no. 8 (July 31, 2019): 62–79. http://dx.doi.org/10.31026/j.eng.2019.08.05.

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The research aims to develop an innovative technique for segmental beam fabrication using plain concrete blocks and externally bonded Carbon Fiber Reinforced Polymers Laminates (CFRP) as a main flexural reinforcement. Six beams designed and tested under two-point loadings. Several parameters included in the fabrication of segmental beam were studied such as; bonding length of carbon fiber reinforced polymers, the surface-to-surface condition of concrete segments, interface condition of the bonding surface and thickness of epoxy resin layers. Test results of the segmental beams specimens compar

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Abdulhameed, Ali A., and AbdulMuttalib Issa Said. "Behaviour of Segmental Concrete Beams Reinforced by Pultruded CFRP Plates: an Experimental Study." Journal of Engineering 25, no. 8 (August 5, 2019): 62–79. http://dx.doi.org/10.31026/j.eng.2019.08.11.

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Research aims to develop a novel technique for segmental beam fabrication using plain concrete blocks and externally bonded Carbon Fiber Reinforced Polymers Laminates (CFRP) as a main flexural reinforcement. Six beams designed an experimentally tested under two-point loadings. Several parameters included in the fabrication of segmental beam studied such as; bonding length of carbon fiber reinforced polymers, the surface-to-surface condition of concrete segments, interface condition of the bonding surface, and thickness of epoxy resin layers. Test results of the segmental beams specimens compar

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Liu, Xinhua, Jianren Zhang, Zihan Cheng, and Meng Ye. "Experimental and Numerical Studies on the Negative Flexural Behavior of Steel-UHPC Composite Beams." Advances in Civil Engineering 2021 (January 31, 2021): 1–15. http://dx.doi.org/10.1155/2021/8828175.

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The cracking of concrete in the negative moment region for a composite beam subjected to a negative bending moment reduces the beam’s strength and stiffness. To improve the cracking performance of composite beams, this paper presents an experimental investigation on applying ultrahigh-performance concrete (UHPC) instead of conventional concrete. Three steel-UHPC composite beams with different forms of joints were designed and tested through a unique rotation angle loading method using a spring displacement control testing setup. The crack distribution, rotation versus crack width, load versus

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Saleh, Fadillawaty. "Determination of Damage Location in Reinforced Concrete Beams Using Mode Shape Curvature Square (MSCS) Method." Applied Mechanics and Materials 845 (July 2016): 140–47. http://dx.doi.org/10.4028/www.scientific.net/amm.845.140.

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This paper presents a numerical algorithm technique to detect cracks propagated in concrete beams based on the frequency response curve of the beam determined from vibration testing. Impact tests on simply supported reinforced concrete beams were conducted to measure vibration on the beam. The ICATS software was carried out to capture the Frequency Response Functions (FRFs) data at each load step. Utilizing the FRFs data, a numerical algorithm based on finite different methods was performed to compute the different FRFs between undamage and damage beams based on the mode shape curvature square

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Buller, A. H., M. Oad, and B. A. Memon. "Flexural Strength of Reinforced Concrete RAC Beams Exposed to 6-hour Fire – Part 2: Rich Mix." Engineering, Technology & Applied Science Research 9, no. 1 (February 16, 2019): 3814–17. http://dx.doi.org/10.48084/etasr.2494.

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In this research work, experimental investigation on flexural strength of reinforced concrete beams exposed to fire for 6-hours at the temperature of 1000˚C is presented. The beams are made with 50% replacement of natural coarse aggregates with recyclable concrete aggregates. A total of 12 reinforced concrete beams using 1:1.5:3 mix (rich mix) and 0.54 water-cement ratio were cast. The beams were prepared in two groups. Group 1 beams were prepared with 50% recyclable aggregates, whereas group 2 beams were cast with all-natural aggregates (control specimens). All beams were exposed to fire at t

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Kachouh, Nancy, Tamer El-Maaddawy, Hilal El-Hassan, and Bilal El-Ariss. "Shear Behavior of Steel-Fiber-Reinforced Recycled Aggregate Concrete Deep Beams." Buildings 11, no. 9 (September 21, 2021): 423. http://dx.doi.org/10.3390/buildings11090423.

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Results of an experimental investigation aimed at studying the effect of steel fibers on the shear behavior of concrete deep beams made with a 100% recycled concrete aggregate (RCA) are presented in this paper. The study comprised testing of seven concrete deep beam specimens with a shear span-to-depth ratio (a/h) of 1.6. Two beams were made of natural aggregates (NAs) without steel fibers, two beams were made of a 100% RCA without steel fibers, and three beams were made of RCA-based concrete with steel fibers at volume fractions (vf) of 1, 2, and 3%. Two of the beams without steel fibers incl

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Michałowska-Maziejuk, Dorota, Barbara Goszczyńska, and Wiesław Trąmpczyński. "Effectiveness of strengthening pre-loaded RC beams with CFRP strips in conventional and accelerated strengthening procedures." MATEC Web of Conferences 284 (2019): 06005. http://dx.doi.org/10.1051/matecconf/201928406005.

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This paper analyses the results obtained from the testing of reinforced concrete beams additionally strengthened with composite materials pressed into the concrete cover using the near-surface-mounted reinforcement (NSMR) method. The testing program comprised two series of beams with cross-sectional dimensions of 0.12 x 0.30 x 3.30 m. The series differed in the amount of longitudinal steel reinforcement, 0.51% and 1.00%. Three beams were cast in each series. One beam was assigned as the control beam, while two other beams were strengthened with carbon fibre strips. A two-component thixotropic

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Rochman, Taufiq, and Suhariyanto. "STATE OF THE ART OF TANK STRUCTURAL EVALUATION REVIEW: A CASE STUDY OF AN ELEVATED CONCRETE WATER TANK CONCERNING CRACK INITIATION." Journal of Southwest Jiaotong University 56, no. 5 (October 30, 2021): 90–106. http://dx.doi.org/10.35741/issn.0258-2724.56.5.9.

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This study aims at the structural evaluation of the elevated concrete water tank condition, including crack initiation, through nondestructive testing. The growing demands for environmental quality have resulted in a rise in the design and construction of tanks and reservoirs in the construction industry. Cracks for water line leakage were found during watertight testing in concrete tanks. Long-term liquid leaking may permanently damage the tank and can contaminate the groundwater. Given the critical existence of leaked cracks in tank serviceability and durability, the contribution examines th

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Seshadri Sekhar, N., P. N. Raghunath, D. Govindarajalu, and K. Suguna. "Cyclic Behaviour of High Performance Concrete Beams Strengthened with GFRP Sheets." Applied Mechanics and Materials 813-814 (November 2015): 1114–20. http://dx.doi.org/10.4028/www.scientific.net/amm.813-814.1114.

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This paper indicates the difference between the strengthened reinforced high performance concrete beams and the normal reinforced high performance concrete beams. This paper shows the cyclic behaviour of the two types of beams. Experimental investigations were carried out on reinforced High Performance Concrete (HPC) beams of size 150 mm × 250 mm × 3000 mm under both static loading and cyclic loading separately under four point bending. It was observed that the trend in behaviour of the load-deflection curve of the beams was showing the same trend of normal reinforced concrete beams under stat

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Indrayani, Indrayani, Lina Flaviana Tilik, Djaka Suhirkam, Suhadi Suhadi, Muhammad Prawira Wardana, and Iros Milawati. "Pengaruh Penambahan Serat Kawat Bendrat Terhadap Kuat Lentur Beton Geopolimer." Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil 10, no. 1 (January 7, 2022): 69–76. http://dx.doi.org/10.33558/bentang.v10i1.2941.

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Currently, innovation continues to be developed to replace cement with other materials so that the use of cement as a building material can be reduced. Utilization of coal waste (fly ash) is an alternative to subtitude cement. From previous studies, fly ash mixed with alkaline materials in the form of NaOH and Na2SiO3 in a ratio of 1:5 can produce geopolymer concrete. This geopolymer concrete research was continued by adding bendrat wire fibers into the geopolymer concrete mixture. The method used in testing the aggregate, testing the compressive strength of normal concrete K225, testing the f

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Bardakov, V. V., A. I. Sagaydak, and S. V. Elizarov. "ACOUSTIC EMISSION BEHAVIOUR OF OVER-REINFORCED CONCRETE BEAMS." Kontrol'. Diagnostika, no. 255 (2019): 4–12. http://dx.doi.org/10.14489/td.2019.09.pp.004-012.

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The paper presents the results of the conducted experimental studies on three-point bend testing of over-reinforced concrete beams with incremental cyclic load, up to destruction, using the acoustic emission method. In total 3 RC beams differ from each other in reinforcement type, concrete composition and ultimate load were tested. Special attention is paid to the investigation of the relationship between destructive processes occurring during the testing of reinforced concrete beams and the evolution of acoustic emission data registered during the test. The analysis described in the article m

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