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Journal articles on the topic 'Prestressed steel'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 January 2023

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1

Hu, Di, Lai Fa Wang, and Ji Ping Guo. "Calculation of Short-Term and Long-Term Behavior of Prestressed Concrete Box Girders Considering Effect of Shear Lag." Key Engineering Materials 400-402 (October 2008): 943–48. http://dx.doi.org/10.4028/www.scientific.net/kem.400-402.943.

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A set of formulae to calculate short-term behavior of simply supported prestressed concrete box girders under dead load and prestress are established based on energy method, in which shear lag and effect of prestressed steel and non-prestressed steel are taken into account. As the time-dependent relationship between stress and strain of concrete, equilibrium of sectional forces and compatibility equation are introduced, a novel approach to analyze long-term behavior of prestressed concrete box girders is presented, and the theoretical formulae considering the synthetic effect of creep and shri

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2

Peng, Rui Tao, Fang Lu, Xin Zi Tang, and Yuan Qiang Tan. "3D Finite Element Analysis of Prestressed Cutting." Advanced Materials Research 591-593 (November 2012): 766–70. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.766.

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In order to reveal the adjustment principle of prestressed cutting on the residual stress of hardened bearing steel GCr15, a three-dimensional thermal elastic-viscoplastic finite element model was developed using an Arbitrary Lagrangian Eulerian (ALE) formulation. Several key simulation techniques including the material constitutive model, constitutive damage law and contact with friction were discussed, simulation of chip formation during prestressed cutting was successfully conducted. At the prestresses of 0 MPa, 341 MPa and 568 MPa, distributions of residual stress on machined surface were

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3

Li, Feng Ge, and Rong Li. "Experiment Study on Dynamic Characteristics of Unbounded Prestressed Concrete Beams." Applied Mechanics and Materials 166-169 (May 2012): 273–76. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.273.

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An experimental investigation on the dynamic characteristics of unbounded prestressed concrete simply support beams is presented in this study. A total of 3 unbounded prestressed concrete simply support beams were constructed and tested. The main variables considered in the test study were the prestress level, the position of prestressed steel and concrete damage. The test results shows that the natural frequencies and model shape of prestressed concrete beams change with the prestress level and the position of prestressed steel, and that the existence or not of concrete crack have certain eff

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4

Bai-jian, Tang, Wang Fei, and Chen Song. "Effect of Prestress Force on Natural Bending Frequency of External Prestressed Steel Beams." Open Civil Engineering Journal 12, no. 1 (2018): 62–70. http://dx.doi.org/10.2174/1874149501812010062.

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Introduction: Natural bending frequencies of externally prestressed steel beam have certain sensitivity to prestress force, so they can be used to find the magnitude of prestress force. Methods: To answer the question if the existence of externally prestressed tendons increases or decreases the natural bending frequencies of a simply supported steel beam, the calculating formula for natural frequencies is deduced by using the energy method from the view point of prestress mechanism and further verified by the finite element method. Using this formula of universal property, the influence of pre

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5

Sun, Qiang, Wei Tian, and Ding Tang Wang. "Analysis of Mechanics Characteristics of Prestressed Steel Beam in High Temperature (Fire) Condition." Applied Mechanics and Materials 351-352 (August 2013): 519–23. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.519.

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According to the requirements of fire science theory and structural fire resistance design, and the situation of possible disasters that may occur in the building based on practical project, this paper analyzes the mechanical characteristics of prestressed steel beam under high temperature (fire) circumstances. It puts forward how to consider the effects of parameters of different steel categories, the magnitude of prestress tension control forces and prestressed loss of steel cables on the structural bearing capacity in prestressed steel beam design, which can provide references for the fire

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6

Jia, Jin Qing, Fang Yu, Da Li Yao, and Wei Qing Zhu. "Strain Analysis of Corrosed Prestressed Concrete Beams on Fatigue Test." Advanced Materials Research 255-260 (May 2011): 355–59. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.355.

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In order to study the relationship between strains and corrosion levels of prestressed concrete beams uder fatigue loading, accelerated corrosion method is used to make various corrosion rates of prestressed steel strands. The beams have the same designs and submitted to the same maximum and minimum load during the test. With the corrosion level as main parameter, strains at different position of the beams, such as non-prestressed steel strain, concrete strain in compressive region at mid-span and prestressed steel strain are studied. The test results show that beams with different corrosion r

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7

Jin, Li Bing, De Cai Chen, and Ji Peng Qi. "Experimental Study on Shear Capacity of Prestressed SFRC Beams." Applied Mechanics and Materials 256-259 (December 2012): 926–29. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.926.

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In order to study the shear capacity enhancement effect of prestressed technology to steel fiber reinforced concrete, the practical formulas were proposed for evaluating the shear-strength of unbonded prestressed steel-fiber reinforced concrete beams (UPSFRCB) through the test and study of shear capacity of UPSFRCB with simply supported ends. Various factors affecting the shear strength of UPSFRCB, such as steel fiber, prestress and shear-span to depth ratio were analyzed. The result is of importance to the popularization and application of prestressed steel-fiber reinforced concrete.

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8

He, Huan An, and Cheng Kui Huang. "Study on Restrained Expansive Deformation of Steel Fiber Reinforced Self-Stressing Concrete." Key Engineering Materials 385-387 (July 2008): 305–8. http://dx.doi.org/10.4028/www.scientific.net/kem.385-387.305.

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A new sort of high performance concrete is introduced which combines most advantages of prestressed concrete and steel fiber concrete, named steel fiber reinforced self-stressing concrete(SFFRSSC for short). Self-stressing concrete is actually a kind of expansive concrete which self-stresses, namely pre-compressive stresses, are induced by dint of some restrictions generally provided by steel bars to concrete expansion after hydration of expansive cement. As a result of chemical reaction, concrete archived prestresses by itself different from mechanical prestressed concrete, so called self-str

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9

Chen, Dongjun, Benniu Zhang, Xingxing Li, et al. "A Stress Measurement Method for Steel Strands Based on LC Oscillation." Advances in Materials Science and Engineering 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/1584903.

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The prestress loss is one of the main factors affecting the safety of prestressed concrete structure. While the detecting signals like sound and light are difficult to spread in steel strands, there is no effective method for prestress detection of the bonded prestressed steel strands in existing structures yet. In this paper, taking into consideration that the electromagnetic oscillation characteristic can make the signal propagate effectively on the bonded prestressed steel strands, a nondestructive prestress detection method based on the electromagnetic effect to detect oscillation frequenc

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10

Hou, Wen Yu, Lian Guang Wang, and Peng Liu. "Bending Capacity of T Beam with Prestressed Concrete-Filled Steel Tube." Applied Mechanics and Materials 368-370 (August 2013): 1048–51. http://dx.doi.org/10.4028/www.scientific.net/amm.368-370.1048.

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The prestressed composite T beam with concrete-filled steel tube is made through welding with half I-beam to connect the concrete-filled circular steel tube. The prestressed reinforcement was equipped on the T-beam. The load-bearing capacity and rigidity of the composite beam was enhanced by using prestressed force. In consideration of applying prestress, the corresponding parts stress and strain from the beginning of applying prestress to the phase of elimination of the pressure is calculated through the process of applying prestress; establish the equation of elastic flexural capacity with d

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11

Zhao, Lijun, Tiesheng Dou, Bingqing Cheng, et al. "Theoretical Study and Application of the Reinforcement of Prestressed Concrete Cylinder Pipes with External Prestressed Steel Strands." Applied Sciences 9, no. 24 (2019): 5532. http://dx.doi.org/10.3390/app9245532.

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Prestressed concrete cylinder pipes (PCCPs) can suffer from prestress loss caused by wire-breakage, leading to a reduction in load-carrying capacity or a rupture accident. Reinforcement of PCCPs with external prestressed steel strands is an effective way to enhance a deteriorating pipe’s ability to withstand the design load. One of the principal advantages of this reinforcement is that there is no need to drain the pipeline. A theoretical derivation is performed, and this tentative design method could be used to determine the area of prestressed steel strands and the corresponding center spaci

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12

Przygocka, M., and R. Kotynia. "Pre-Stress Losses in FRP Pre-Stressed Reinforced Concrete – Subject Overview." Archives of Civil Engineering 64, no. 4 (2018): 257–68. http://dx.doi.org/10.2478/ace-2018-0073.

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AbstractFiber reinforced polymers (FRPs) due to their specific high-strength properties become more and more popular and replace traditional structural materials like conventional steel in prestressed concrete structures. FRP reinforced structures are relatively new when compared to structures prestressed with steel tendons. For that reason only several studies and applications of pre-tensioned FRP reinforcement have been conducted until now. Moreover, researchers only considered short-term behavior of FRP reinforced concrete members. The precise information about long-term behavior of FRP rei

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13

Liu, Li, Fang Wang, and Kai Wang. "Finite Element Analysis on Contact Surface Slip of Profiled Steel Sheet and Composite Slab." Advanced Materials Research 568 (September 2012): 256–59. http://dx.doi.org/10.4028/www.scientific.net/amr.568.256.

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In order to evaluate correctly the load-bearing performance of the prestressed profiled steel sheet composite slab，according to actual loading conditions, finite element model of the prestressed profiled steel sheet and concrete composite slab is established. Numerical simulation is made to the slip of the prestressed composite slab. The calculation results show that the slip of the prestressed composite slab at ultimate status will be gradually reduced with the improvement of the concrete strength. When increasing the prestress, the slip value at ultimate status will be less reduced and incre

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14

Guo, Nan, Mingtao Wu, Ling Li, Guodong Li, and Yan Zhao. "Bending Performance of Prestressed Continuous Glulam Beams." Advances in Civil Engineering 2021 (June 25, 2021): 1–16. http://dx.doi.org/10.1155/2021/5512350.

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The limited transferring moment capability of Glulam (glued laminated wood) joints results in insufficient joint stiffness. Therefore, most of the connections are hinged joints. Based on the previous studies, one novel end-connection device was proposed to form prestressed continuous Glulam beams. The prestressed beams were composed of prestressed low-relaxation steel bars, the deviator block, the anchorage device, and the novel end-connection apparatus. These prestressed steel bars were tensioned by the deviator block to exert prestress. Then, 18 prestressed continuous beams and two prestress

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15

Du, Jin Sheng, Dong Yang, P. L. Ng, and Francis T. K. Au. "Response of Concrete Beams Partially Prestressed with External Unbonded Carbon Fiber-Reinforced Polymer Tendons." Advanced Materials Research 150-151 (October 2010): 344–49. http://dx.doi.org/10.4028/www.scientific.net/amr.150-151.344.

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To assess the behavior of concrete beams partially prestressed with external unbonded carbon fiber-reinforced polymer (CFRP) tendons, three specimens prestressed with CFRP tendons and one reference specimen prestressed with external steel tendons were tested to failure under third point loading. It was found that the load-deflection curve of all specimens exhibited three stages, namely, elastic, cracked-elastic and plastic. The transition from the elastic to the cracked-elastic stage was caused by the development of cracks at the bottom of the beam, while the transition from the cracked-elasti

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16

Lan, Chun Guang, Zhi Zhou, and Jin Ping Ou. "A Novel GFRP-FBG Smart Steel Strand and its Properties Research." Applied Mechanics and Materials 105-107 (September 2011): 1087–91. http://dx.doi.org/10.4028/www.scientific.net/amm.105-107.1087.

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Prestress strands are the key parts of the prestressed structure, and the stress of the prestressed strands is one of the important indicators to assess prestress component security. Unfortunately, up to date, there are no qualified techniques to handle this issue due to that it is too hard for sensors to survive the harsh construction environments and the time-dependent service life of prestressed structures. In this paper, a novel smart steel strand based on the technique of GFRP-FBG rebar was introduced, and its sensing principle has also been given in details. The novel smart steel strand

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17

Ma, Jia, and Qing Shan Yang. "Study on Prestressed Laminated Strand Lumber and its Load-Carrying Capacity." Advanced Materials Research 168-170 (December 2010): 1470–75. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.1470.

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Owing to some problems in the existent plywood products such as weak shear capacity and weak wear intensity, as while as the large consumption of crude wood resources, prestressed laminated strand lumber (PLSL) is proposed in this paper, in which the multiple integration method and prestressed technology are adopted to obtain a higher strength. More significantly, used wood can be reused as the raw material of PLSL, then the crude wood will be conserved and the cost will be lowered. To study its mechanical properties, the commercial software ANSYS is adopted to establish the finite element mod

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18

Wei, Fang Fang, Jin Bo Wang, Ben Wei Zou, and Hao Sun. "FEM Research on Static Mechanical Performance of Twice Prestressed Composite Curved Beam." Advanced Materials Research 243-249 (May 2011): 1038–42. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.1038.

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The conception of twice prestressed composite structures (TPCS) was proposed in order to solve great distortion problems in prestressed concrete structures. Through decomposition of the total prestress, we define the 1st stage as one part of the prestress acting on a prefabricated beam, and the 2nd as the other part on a post-pouring structure. This kind of structure could substantially decrease its distortion and enhance the efficiency of prestress, at the same time contributing to flexibly laying the prefabricated concrete. A continuous curved prestressed concrete box girder bridge was model

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19

Huo, Jun Hua, and Bo Pang. "Mechanical Property Study of Corroded Steel Beams Strengthened with Prestressed CFRP Sheets." Advanced Materials Research 594-597 (November 2012): 955–58. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.955.

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Steel structure, which has higher bearing capacity, smaller sectional dimension, convenient construction and economical investment, can be abroad used in engineering. However, due to a lot of reasons, the gradual expansion and convergence of the micro-defects lead to the macro deterioration of the mechanical properties of materials. By experimental research, theoretical analysis and computer simulation, the mechanical properties of the corroded steel beams strengthened with (prestressed) CFRP sheets were studied. According to the mechanical characteristics of corrosive steel beams and corrosiv

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20

Lv, Qingfang, Ye Liu, and Yi Ding. "Analyses on Prestress Loss and Flexural Performance of the Laminated Bamboo Beam Applied with Prestressed BFRP Sheet." Advances in Civil Engineering 2019 (April 30, 2019): 1–13. http://dx.doi.org/10.1155/2019/2319814.

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Inspired by the studies about wooden beam applied with prestressed steel plate and bamboo beam strengthened by fiber-reinforced polymer (FRP), this paper aims to explore the applicability of the prestressed basalt fiber-reinforced polymer (BFRP) sheet to the laminated bamboo beam and the variation of the flexural performance of the laminated bamboo beam applied with prestressed BFRP sheet. Two series of tests were conducted in the present study. In the first series of tests, the prestress loss of the prestressed BFRP sheet was classified and analyzed based on measured strains and deflections,

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21

Xu, Qiang, Jianyong Song, Jianxiang Feng, and Jinsheng Du. "Parameters Analysis for Bending Properties of Externally Prestressed Concrete Beam with Corrugated Steel Webs." MATEC Web of Conferences 186 (2018): 02006. http://dx.doi.org/10.1051/matecconf/201818602006.

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Based on the bending moment-curvature method, a calculation program for the whole bending process of externally prestressed concrete beam with corrugated steel webs is compiled and parametric analysis is conducted. Considering the nonlinearity of material, this procedure can calculate the whole bending process of externally prestressed composite beam with corrugated steel webs under different load, cross section, and external tendons profiles and output the cross section strain of concrete and ordinary reinforcements, stress increment of external prestressing tendons and mid-span deflection. T

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22

Lu, Yi, Yu Zhang, Bin Jia, Chun Yu Liu, and Can Deng. "The Design and Mechanical Properties Research of Stretching and Anchoring Integrated Anchorage for Prestressed FRP Reinforcing Steel Pipline." Applied Mechanics and Materials 744-746 (March 2015): 323–26. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.323.

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Because of the existence of “loads second time effect” in reinforceing damaged internal pressure steel pipeline without prestressed FRP, the fiber cannot fully play it’s advantage of high strength. Prestressed FRP is one of the effective ways to solve this problem. According to the BFRP reinforcement of damaged internal pressure steel pipeline, this paper designed a set of the circumferential prestress stretching and anchoring integral anchorage. And tested the conversion relation between torque and stress of BFRP sheet.

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23

Siddiqui, Nadeem, Husain Abbas, Tarek Almusallam, Q. M. Li, and Yousef Al-Salloum. "Reliability Assessment of Steel-Lined and Prestressed FRC Slabs against Projectile Impact." Applied Sciences 13, no. 1 (2022): 90. http://dx.doi.org/10.3390/app13010090.

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A simulation-based probabilistic method is proposed for assessing the reliability of steel-lined and prestressed fiber-reinforced concrete (PFRC) slabs against the impact loads. The impact testing of several prestressed and non-prestressed FRC slabs of 800 × 800 × 100 mm in size was carried out. The experimental program involved projectile impact testing of prestressed and non-prestressed FRC slabs using a gas gun. Three parameters were varied for testing of slabs under the projectile impact, viz., a quantity of steel fibers in the concrete, steel lining on the backside of the slab, and the pr

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24

Balevičius, Robertas, and Eugedijus Dulinskas. "EVALUATION OF CONCRETE LINEAR CREEP IN DETERMINATION OF STRESS STATE AND STEEL PRESTRESS LOSSES IN CONCRETE MEMBERS/BETONO TIESINIO VALKŠNUMO ĮVERTINIMAS, NUSTATANT GELŽBETONINIŲ ELEMENTŲ ĮTEMPIMŲ BŪVĮ IR ARMATŪROS IŠANKSTINIO ĮTEMPIMO NUOSTOLIUS." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 5, no. 6 (1999): 364–73. http://dx.doi.org/10.3846/13921525.1999.10531491.

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Determination of stress-strain state imposed by concrete linear creep and specification of steel prestress losses in linear prestressed concrete member is discussed in this article. Particularities of regulations of the Code acting in Lithuania [1] and of Eurocode [2] are analysed and a modified method for calculation of steel prestress losses due to concrete linear creep in prestressed concrete linear members suitable for assessment of Code regulations is presented. Also, the method is used for analysis of results of long-term tests of reinforced concrete members. In Lithuania, a code based o

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25

An, Jing Bo. "Unified Design of Tensile-Compression Prestressed Concrete Structure." Applied Mechanics and Materials 193-194 (August 2012): 970–75. http://dx.doi.org/10.4028/www.scientific.net/amm.193-194.970.

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Structural characteristics of tensile-compression prestressed concrete are introduced briefly in this paper. Firstly, with current concrete structure design code（GB50010）, requirements for materials used in tensile-compression prestressed concrete structure are put forward; and for prepressing stress steel pipe, strength value and basic types for structure design are determined. Secondly the calculation method of prestress loss is given during each work stage of tensile-compression prestressed concrete; and the basic measures of cracking control are concluded. Thirdly, bearing capacity formula

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26

Kaurov, Anatoliy I. "Deformability of prestressed flexural reinforced concrete elements with high-tensile reinforcement steel of At1200 class." Journal «Izvestiya vuzov. Investitsiyi. Stroyitelstvo. Nedvizhimost» 11, no. 2 (2021): 260–73. http://dx.doi.org/10.21285/2227-2917-2021-2-260-273.

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A homegrown innovation of thermo-mechanically treated high-tensile reinforced steel (AT1200 class, 30HGS2 and 30HS2 types) increases the efficiency of prestressed reinforced concrete in the construction industry. This paper analyses the deformability of prestressed flexural reinforced concrete elements with the AT1200 reinforcement steel. To study the characteristics of the stress-strain behaviour in flexural elements with the AT1200 reinforcement steel, rectangular-sectioned, conventional and prestressed reinforced concrete beam elements were tested. Reference deflection of the test elements,

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27

Vacek, Vítězslav, Jiří Kolisko, Petr Pokorný, and Michaela Kostelecká. "Steel Reinforcement Corrosion - Its Impact on Features of Steel PSC Strand." Key Engineering Materials 868 (October 2020): 57–64. http://dx.doi.org/10.4028/www.scientific.net/kem.868.57.

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Steel reinforcement made of refined maraging steel in the form of wires and strands has been for a long time used commonly for reinforcement of prestressed concrete structures. Defects on some of them and unfortunately even accidents of some cases of bridge objects, mainly recently published by media, related to corrosion of prestressed reinforcement awoke interest of both professional and wide non-professional public related to its durability. This issue also opens up a question of durability and liability of prestressed structures. In majority of existing prestressed structures the anticorro

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Nguyen Huy, Cuong, and Quang Ngo Dang. "Experimental study on flexural behavior of prestressed and non-prestressed textile reinforced concrete plates." Transport and Communications Science Journal 71, no. 1 (2020): 37–45. http://dx.doi.org/10.25073/tcsj.71.1.5.

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The application of prestressing steel is restricted in highly corrosive environment area due to corrosion of prestressing steel, which leads to reduction in strength and it may cause sudden failure. Carbon textile is considered as an alternate material due to its corrosive resistance property, high tensile strength and perfectly elastic. In this study, an experimental investigation was carried out to study the flexural behavior of prestressed and non-prestressed carbon textile reinforced concrete plates. This study also focuses on the inﬂuences of textile reinforcement ratios, prestress grades

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Wang, Lian Guang, Hai Fu Zhang, and Jun Hua Huo. "Interfacial Shear Stress Calculation of Prestressed CFRP Sheet Reinforcing Steel Beam." Advanced Materials Research 243-249 (May 2011): 1096–100. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.1096.

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The steel beam is strengthened by prestressed CFRP sheets, which can increase capacity, reduce distortion and improve the utilization of CFRP cloth. Through the adhesive layer, the CFRP sheets and steel beam work together. Therefore, the interface is the weak link components, the adhesive layer and the physical and mechanical properties of CFRP fabric is an important factor for interfacial shear stress. Based on the elastic theory, a prestressed CFRP cloth and steel interface shear stress differential equation is established, and a calculation formula for interface shear stress is given. The c

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Obaydullah, M., Mohd Zamin Jumaat, U. Johnson Alengaram, Md Humayun Kabir, and Muhammad Harunur Rashid. "COMBINING EBR CFRP SHEET WITH PRESTRESSED NSM STEEL STRANDS TO ENHANCE THE STRUCTURAL BEHAVIOR OF PRESTRESSED CONCRETE BEAMS." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 27, no. 8 (2021): 637–50. http://dx.doi.org/10.3846/jcem.2021.14905.

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In this study, a combined strengthening technique is used to improve the flexural performance of prestressed concrete beams using CFRP sheets as EBR and prestressed steel strands as NSM. Seven prestressed beams were tested under four-point loading with one control specimen, one EBR CFRP sheet strengthened specimen, one NSM steel strand without prestress strengthened specimen and four specimens strengthened with a combination of EBR CFRP sheet and NSM steel strands prestressed from 0% to 70% of their tensile strength. The flexural responses and failure modes of the specimens were investigated a

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

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Prestressed steel reinforced concrete structure, compared with other concrete structure has its unique advantages. So it is mainly used in large span and conversion layers. With the popularization of this structure,more attention should be payed on fire resistance performance. On the basis of reasonable assume,two steps model is used as concrete high strength calculation model. Simplified intensity decreased curve is used as rebar,steel and prestressed. Two ultimate bearing capacity formulas of prestressed steel reinforced concrete beam are established. One is for the beam whose tensile area i

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Dong, Jian Tao, Jun Zhao, and Kai Shi. "Dynamic Behavior and Stability of Prestressed Arch-Supported Reticulate Shell Structure." Advanced Materials Research 150-151 (October 2010): 188–93. http://dx.doi.org/10.4028/www.scientific.net/amr.150-151.188.

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As a new long-span space system, the prestressed arch-supported reticulate shell structure performs the advantages of reticulated shell and prestressed structure. The construction process, large span/depth ratio and small critical load of long-span space structure, can lead to obvious stress excess of tensile steel, especially when prestressed arches are used in truss arch and reticulated shell combined structure. However, no research was conducted on how the residual stress in the steel affects the structure stability. Thus, the dynamic behavior of some actual structure is simulated numerical

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33

Liu, Zhansheng, Antong Jiang, Anshan Zhang, Zezhong Xing, and Xiuli Du. "Intelligent Prediction Method for Operation and Maintenance Safety of Prestressed Steel Structure Based on Digital Twin Technology." Advances in Civil Engineering 2021 (April 22, 2021): 1–17. http://dx.doi.org/10.1155/2021/6640198.

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The operation and maintenance stage of the long-span prestressed steel structure is the core link of the whole life cycle. At present, there are few studies on the change law of safety risk in the whole process of operation and maintenance, especially the research on the analysis and prediction of the change law of safety risk in the whole process of structural operation and maintenance by effectively using the abundant monitoring data and relevant safety risk information in the operation and maintenance stage, which also affects the prestressed steel, which also affects the efficiency of judg

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34

Chen, Daihai, Yanchang Wan, Shizhan Xu, Zheng Li, and Yilin Fang. "Numerical Analysis of the Influence of Prestressed Steel Wires on Vehicle-Bridge Coupling Vibration of Simply Supported Beams on High-Speed Railway." Baltic Journal of Road and Bridge Engineering 17, no. 3 (2022): 66–91. http://dx.doi.org/10.7250/bjrbe.2022-17.569.

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By the theory of vehicle-bridge coupled vibration analysis in railways, the dynamic analysis model for space of the train-track-bridge-steel wires coupled system was established. Moreover, a corresponding program was compiled based on the train-track-bridge-steel wires coupling vibration analysis method. Taking a 32 m simple beam which is in high-speed railways as the subject of study, the influence of effective prestress, steel wires eccentricity and vehicle speed on the dynamic response of the vehicle-bridge coupled vibration was analysed. The results show that the bridge dynamic response is

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35

Zhou, Chun Li, Ru Yang, and Xue Ying Tang. "Finite Element Analysis of Prestressed Concrete-Filled Square Steel Tube Truss." Advanced Materials Research 838-841 (November 2013): 510–13. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.510.

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Prestressed concrete-filled square steel tube truss is the kind of truss whose upper chords and lower chords are respectively concrete-filled square steel tube and prestressed square steel tube. Four truss models as square steel tube truss, concrete-filled square steel tube truss, prestressed square steel tube truss and prestressed concrete-filled square steel tube truss were analysed by ANSYS, each of those truss models’ span has three variations. The result shows that the bar sections’ strength of square steel tube truss and concrete-filled square steel tube truss are far from reaching their

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Yu, Jian Jun, and Lian Guang Wang. "Nonlinear Analysis of Prestressed Cold-Formed U-Shaped Steel and Concrete Composite Beams." Advanced Materials Research 594-597 (November 2012): 749–52. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.749.

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Cold-formed U-shaped steel and concrete composite beam is a kind of composite beam which the steel and the concrete are integrated by welding connections on the cold-formed U-shaped steel and then pouring concrete on the steel. Now, many experts and scholars have carried out many experimental research and theoretical analysis about it. But, prestressed Cold-formed U-shaped steel and concrete composite beams have not been studied. Based on the structure , the nonlinear analysis mode of prestressed cold-formed U-shaped steel and concrete composite beams is proposed, the calculating program is re

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Li, Ke, Xin Ling Wang, and Shuang Yin Cao. "Fatigue Performance of Partially Prestressed RC Beams with HRBF500 Bars." Applied Mechanics and Materials 174-177 (May 2012): 1463–70. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.1463.

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500 MPa level hot-rolled ribbed bars of fine grains (HRBF500) is a successfully developed new-type steel in Chain. The fatigue behavior of partially prestressed reinforced concrete (RC) beams with HRBF500 bars was investigated in fatigue tests of pre-tensioned T-beams. The beams are simply supported with the same overall dimensions, and the main parameter in the study is prestress degree and longitudinal steel ratio. Four beams were constructed and tested under constant-amplitude fatigue loading. All beams are initially cracked before the application of repeated loading. The stress evolution o

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Oh, Jae Yuel, Deuck Hang Lee, Sang Hum Cho, Hyun Kang, Hae-Chang Cho, and Kang Su Kim. "Flexural Behavior of Prestressed Steel-Concrete Composite Members with Discontinuous Webs." Advances in Materials Science and Engineering 2015 (2015): 1–13. http://dx.doi.org/10.1155/2015/278293.

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The corrugated webbed prestressed (CWPS) composite member was developed to improve the efficiency of the prestress introduced into the steel beam, and experimental studies were performed to examine its structural behavior. Additionally, a unified analysis model that can estimate the nonlinear flexural behavior of the composite member and the accordion effect of the corrugated webbed steel beams at the prestressing stage was proposed. As a consecutive experimental series, in this study, the discontinuous-webbed prestressed (DWPS) composite member was developed, and this innovative composite mem

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Huang, Hai Rong, Hao Zhang, Lu Min Wang, Qi Keng Xu, and Da Ying Zhang. "The Experimental Study on Prestress Losses of Steel Stranded Wire in Non-Coherent Prestressed Concrete Silos." Advanced Materials Research 243-249 (May 2011): 1331–34. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.1331.

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In this paper, non-coherent prestressed steel stranded wire being introduced in one concrete silo model of 10m inner diameter is tensed at both ends. The prestress losses of wires are tested. Based on the tested result, the trend of prestress losses and prestressing wires strain is educed.

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M.A. Gharib, W.H. Khushefati, M.A. Khedr, and E.Y. Sayed-Ahmed. "Performance of steel beams strengthened with prestressed CFRP laminate." Electronic Journal of Structural Engineering 15 (June 1, 2015): 60–69. http://dx.doi.org/10.56748/ejse.15203.

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Prestressed Carbon Fibre Reinforced Polymer (CFRP) system is generally used for strengthening reinforced concrete beams where CFRP laminate can improve both the strength and serviceability behaviour of reinforced concrete beams via increasing the overall member stiffness. However, the applicability of this technique to strengthening steel structures is still lagging behind its application to concrete structures. In this study, the flexural behaviour of steel I-beams strengthened with prestressed CFRP laminate using a mechanical anchorage system is experimentally investigated. A total of nine s

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Du, Huanhuan, Jianyou Pan, Huaxun Shen, and Jie Dong. "Numerical Analysis of Flexural Behavior of Prestressed Steel-Concrete Continuous Composite Beams Based on BP Neural Network." Computational Intelligence and Neuroscience 2022 (May 10, 2022): 1–10. http://dx.doi.org/10.1155/2022/5501610.

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Prestressed steel-concrete continuous composite beam (PCCB) is a kind of beam, which makes reinforced concrete slab and steel beam bear load and coordinate deformation through connectors such as studs. Prestressed steel-concrete continuous composite beam is a kind of transverse load-bearing composite member formed by prestressed technology on the basis of ordinary composite beam. Aiming at the flexural behavior of prestressed steel-concrete continuous composite beams, a three-dimensional finite element numerical analysis model is established, and the whole process of the test is simulated base

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Pang, Miao, Xing Liu, Yi Dong, and Tiejiong Lou. "Numerical Assessment on Bonded and Unbonded Prestressed Concrete Beams." Buildings 12, no. 10 (2022): 1658. http://dx.doi.org/10.3390/buildings12101658.

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The tendon stress in bonded prestressed concrete (BPC) beams is section-dependent while it is member-dependent in unbonded prestressed concrete (UPC) beams, leading to marked difference between these two structural systems. However, little work has addressed the bond effect of steel tendons. This research presents comparative investigations of BPC and UPC beams with various prestress levels. A numerical model is experimentally validated. Numerical assessments are conducted for simply supported and continuous scenarios, focusing on the effects of bond condition and prestress level. The results

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Wang, Tong, Jing Di, and Hongliang Zuo. "Long-Term Loading Experimental Research of Prestressed Glulam Beams Based on Creep Influence." Sustainability 14, no. 16 (2022): 9937. http://dx.doi.org/10.3390/su14169937.

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In this paper, long-term loading tests of ten prestressed glulam beams were carried out for 45 days, using the loading method of three-point hanging heavy objects. We analyzed the influence of prestressed steel wire numbers and total preloading force on parameters such as failure mode of beams, variation of steel wire stress, and long-term deflection of mid-span. When the total prestress was constant and the number of steel wires was 2, 4, and 6, the total stress of steel wires decreased by 33.07%, 37.26%, and 50.04%, respectively, after long-term testing for 45 days. The ratio of mid-span def

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Wang, Cheng Quan, Yue Feng Zhu, and Yong Gang Shen. "Finite Element Analysis of Prestressed Steel Reinforced Concrete Beam." Applied Mechanics and Materials 433-435 (October 2013): 2302–8. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.2302.

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Non-linear finite element model of prestressed steel reinforced concrete(PSRC) beams were carried out by using software ABAQUS. The effects of the parameters of non-prestressed reinforcement ratio, prestressed reinforcement ratio, effective prestressed force and non-prestressed tendons yield strength on the ultimate strength and ductility of PSRC beam were investigated. It is found that increase of the tension reinforcement ratio has little impact on the ultimate deflection but can improve the ultimate capacity of PSRC beam. Increase of the prestressed steel ratio can significantly improve the

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Liang, Jiong Feng, Jian Bao Wang, and Jian Ping Li. "Experimental Research on Bending Performance of Concrete Beams Reinforced with CFRP-PCPs Composite Rebars." Applied Mechanics and Materials 438-439 (October 2013): 804–6. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.804.

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The flexural behavior of concrete beams reinforced with CFRP-PCPs composite rebars was studied. Experimental results showed that the deflection of beams reinforced with highly prestressed prisms is at service loads coMParable to deflection of steel reinforced beam. Flexural cracks of CFRP-PCPs composite rebars reinforced beams are hairline before prism cracking, and widened after the prism cracking. When the concrete beam was reinforced with the prestressed concrete prisms, the crack width decreased as the prestress in the prism increased.

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Zhou, Chun Li, and Qian Zhang. "Study on Bend Performence of Binding Bars Prestressed Steel Box Concrete Beam." Applied Mechanics and Materials 351-352 (August 2013): 990–97. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.990.

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Put forward binding bars prestressed concrete filled steel box girder and analyses it’s advantage, Study on the bending moment by the fiber model method to analyze the beam-Curvature and load-Relation curves of deflection theory.Through the finite element software analysis of prestressed concrete steel box beam prestressed concrete filled steel tubes and four ways to set binding bars the ultimate bearing capacity of the beam,Analysis of the influence of the thickness of the steel plate and rod diameter, constraint, constraint rod axial spacing on various beam flexural capacity.The results show

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Wang, Xin Zhong, and Chuan Xi Li. "Mechanical Properties Analysis of CFRP Pre-Stressed Section Continuous Thin-Walled Box Girder Bridge Models 22." Applied Mechanics and Materials 624 (August 2014): 592–95. http://dx.doi.org/10.4028/www.scientific.net/amm.624.592.

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An externally pre-stressed continuous box girder bridge model is designed according to loading features of the continuous beam. The CFRP bars and steel strands are used to make two models for externally pre-stressed reinforcements Analysis of the two models under three different load stiffness and loss of prestress, through calculation and analysis, found that two kinds of prestressed concrete material model under three load deflection basic same, also almost the same change trend, prestressed RMS model than model 1, 2 but with the increase of load model 2 prestress loss is big. Analysis resul

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Zhao, Lijun, Tiesheng Dou, Bingqing Cheng, et al. "Experimental Study on the Reinforcement of Prestressed Concrete Cylinder Pipes with External Prestressed Steel Strands." Applied Sciences 9, no. 1 (2019): 149. http://dx.doi.org/10.3390/app9010149.

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The prestressed concrete cylinder pipe (PCCP) suffers from cracks and degrades due to the prestress loss which is induced by wire breakage. Reinforcement with external prestressed strands is an option to return the deteriorating pipe’s ability to withstand internal pressures. This reinforcement contributes to actively compensating for the prestress loss caused by broken wires at an economic price. The crack propagation in the core is constrained by the strands. Moreover, the high tensile strength of strands does not decrease with an increase in the bending angle. It is also unnecessary to dewa

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Guo, Nan, Yunan Zhang, Lidan Mei, and Yan Zhao. "Experimental Study on Flexural Performance of the Prestressed Glulam Continuous Beam after Long-Term Loading." Buildings 12, no. 7 (2022): 895. http://dx.doi.org/10.3390/buildings12070895.

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The study of the long-term behavior of the prestressed continuous beam is vital for the design and the appliance of wood structures in engineering. In this study, long-term experiments were first conducted to determine the long-term creep behavior. Afterward, the prestress of the long-term beam was regulated to the initial state, and we carried out short-term flexural experiments to explore the effect of prestressing regulation. The influences of prestressed value and the number of prestressed steel wires on the mechanical properties of the continuous beam were investigated and discussed. The

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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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