Gotowe bibliografie tematyczne / Prestressed

Gotowa bibliografia na temat „Prestressed”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 19 lutego 2023

Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych

Wybierz rodzaj źródła:

Spis treści

Zobacz listy aktualnych artykułów, książek, rozpraw, streszczeń i innych źródeł naukowych na temat „Prestressed”.

Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.

Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.

Artykuły w czasopismach na temat "Prestressed"

1

MIRMIRAN, AMIR, AMDE M. AMDE i ZEFANG XU. "ELASTO-PLASTIC BUCKLING OF PRESTRESSED ARCHES". International Journal of Structural Stability and Dynamics 02, nr 03 (wrzesień 2002): 295–313. http://dx.doi.org/10.1142/s0219455402000580.

Pełny tekst źródła
Streszczenie:
Intentional buckling as a fabrication technique for arch frameworks results in prestrains at every section of the arch, which in turn affect its strength and stability. A nonlinear corotational straight beam element with elastic, linear strain hardening material has been developed to study the elasto-plastic buckling of prestressed arches. The study indicates that for prestressed arches there is an interdependence between the slenderness and steepness ratios of the arch with the ratio of prestresses to the yield strength of the material, all of which control the magnitude and shape of buckling mode. While steeper arches are generally more stable in their elastic range, the effect of steepness ratio is reduced as the prestress exceeds 55% of the yield strength. Effects of loading and support conditions have also been considered. Although fixed supports result in more stable arches, their effectiveness depends on the steepness ratio and the level of prestresses. Finally, the effect of strain hardening on the plastic buckling of the arch is more pronounced for lower values of the plastic tangent modulus.
Style APA, Harvard, Vancouver, ISO itp.
2

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

Pełny tekst źródła
Streszczenie:
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 simulated and experimentally verified. The results indicated that residual compressive stress on machined surface were achieved and actively adjusted by utilizing the prestressed cutting method; meanwhile, within the elastic limit of bearing steel material, the higher applied prestress leads to the more prominent compressive residual stress in the surface layer and subsequently the higher fatigue resistance of the part.
Style APA, Harvard, Vancouver, ISO itp.
3

Li, Jian, Shanxiong Chen, Fei Yu i Lingfa Jiang. "Reinforcement Mechanism and Optimisation of Reinforcement Approach of a High and Steep Slope Using Prestressed Anchor Cables". Applied Sciences 10, nr 1 (30.12.2019): 266. http://dx.doi.org/10.3390/app10010266.

Pełny tekst źródła
Streszczenie:
Using prestressed anchor cables is one of the most common approaches for reinforcing slopes. By establishing a calculation model for a high and steep slope, the changes of displacement of slope foot and increment of force on the cables under different prestresses were calculated. Furthermore, the influence of prestress on the changes of displacement of slope foot and force on the cables was analysed. By analysing the changes in force on cables in different parts of the slope, the reinforcement mechanism of a prestressed anchor cable on the slope was attained. The result showed that the reinforcement effect of prestressed anchor cable on the slope was mainly attributed to it effectively restricting the displacement of sliding mass in the slope, while the effect of cables in the lower part of the slope was more significant than that of those in the upper part of the slope. Therefore, to reduce the number of cables, decrease the construction difficulty of cables and save money, it is feasible to remove cables in the range of the upper-third of the slope. Afterwards, by improving the cable prestress in the range of the lower-third and reducing the cable prestress in the middle, the safety factor of the slope can satisfy design requirements, thus reinforcing the slope.
Style APA, Harvard, Vancouver, ISO itp.
4

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

Pełny tekst źródła
Streszczenie:
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 effects on the dynamic characteristics of prestressed concrete beams.
Style APA, Harvard, Vancouver, ISO itp.
5

Lv, Qingfang, Ye Liu i Yi Ding. "Analyses on Prestress Loss and Flexural Performance of the Laminated Bamboo Beam Applied with Prestressed BFRP Sheet". Advances in Civil Engineering 2019 (30.04.2019): 1–13. http://dx.doi.org/10.1155/2019/2319814.

Pełny tekst źródła
Streszczenie:
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, which led to a derivation of the effective prestressed force considering the prestress loss. Analyses showed that the recommended value of prestress loss compared with the initial prestressed force was 22.0% based on the existing test data in the specimen preparation stage. In the second series of tests, the static loading test was performed to investigate the flexural performance of the laminated bamboo beam applied with prestressed BFRP sheet and analyze the difference between the laminated bamboo beams applied with prestressed and non-prestressed BFRP sheets. Test results showed that the no significant variation of the ultimate load and a reduction of the ultimate deformation capacity were caused by the application of the prestressed BFRP sheet.
Style APA, Harvard, Vancouver, ISO itp.
6

Batchelor, B. DeV, Jayanth Srinivasan i Mark F. Green. "Losses in partially prestressed concrete". Canadian Journal of Civil Engineering 15, nr 5 (1.10.1988): 890–99. http://dx.doi.org/10.1139/l88-114.

Pełny tekst źródła
Streszczenie:
The calculation of prestress losses by the age-adjusted effective modulus method is analyzed and compared with the Ontario highway bridge design code predictions for partially prestressed concrete. Specifically, the effect of nonprestressed reinforcement on prestress losses is studied. The age-adjusted effective modulus method for calculating prestress losses is outlined, and plots of prestress losses versus partial prestressing ratio are presented and analyzed. It is shown that prestress losses decrease with increasing amounts of nonprestressed reinforcement. Also, the Ontario highway bridge design code expressions, which are intended for use with fully prestressed sections, are not suitable for use in the design of partially prestressed concrete members. Key words: concrete (prestress), design, partial prestressing, prestress losses.
Style APA, Harvard, Vancouver, ISO itp.
7

Xue, Gang, i Chong Ge Wang. "Experimental Study on Natural Frequency Variation Regulations of Simply Supported Externally Prestressed Concrete Beams". Applied Mechanics and Materials 351-352 (sierpień 2013): 1043–46. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.1043.

Pełny tekst źródła
Streszczenie:
In order to study the relationship between prestress and natural frequencies and the factors of influence natural frequence change, a dynamic test on three simply supported externally prestressed concrete beams of different prestressed level was carried out. The results showed that the eccentricity and arrangement of externally prestressed tendons and the constraints have more influence on natural frequencies than prestress itself. The prestressed effect comes from combined action of the several factors, and the natural frequencies of beams were found to agree well with the prestress. It appears that higher order frequencies have greater increment usually.
Style APA, Harvard, Vancouver, ISO itp.
8

Li, Chen, Kai Yin Zhang i Zhong Lin Fan. "Research on Prestressed Loss in Curving Hole of Prestressed Concrete Structure Caused by Frictional Resistance". Applied Mechanics and Materials 587-589 (lipiec 2014): 1668–71. http://dx.doi.org/10.4028/www.scientific.net/amm.587-589.1668.

Pełny tekst źródła
Streszczenie:
Excessive prestressed loss in prestressed concrete continuous beam bridge and continuous rigid frame bridge causes structures appearing different types of diseases. By theoretical analysis on computational expression of effective prestress in curving hole, and distribution of contact stress and experiment about prestressed loss caused by frictional resistance, this paper points out the disadvantages of current effective prestress formula in curving hole. According to the research on the major influencing factors of prestressed loss in curving hole-contact status and friction coefficient μ, it plays a remarkable role on the further analysis of prestressed loss in curving hole.
Style APA, Harvard, Vancouver, ISO itp.
9

Shi, Luning, Haoxiang He i Weiming Yan. "Prestress Force Identification for Externally Prestressed Concrete Beam Based on Frequency Equation and Measured Frequencies". Mathematical Problems in Engineering 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/840937.

Pełny tekst źródła
Streszczenie:
A prestress force identification method for externally prestressed concrete uniform beam based on the frequency equation and the measured frequencies is developed. For the purpose of the prestress force identification accuracy, we first look for the appropriate method to solve the free vibration equation of externally prestressed concrete beam and then combine the measured frequencies with frequency equation to identify the prestress force. To obtain the exact solution of the free vibration equation of multispan externally prestressed concrete beam, an analytical model of externally prestressed concrete beam is set up based on the Bernoulli-Euler beam theory and the function relation between prestress variation and vibration displacement is built. The multispan externally prestressed concrete beam is taken as the multiple single-span beams which must meet the bending moment and rotation angle boundary conditions, the free vibration equation is solved using sublevel simultaneous method and the semi-analytical solution of the free vibration equation which considered the influence of prestress on section rigidity and beam length is obtained. Taking simply supported concrete beam and two-span concrete beam with external tendons as examples, frequency function curves are obtained with the measured frequencies into it and the prestress force can be identified using the abscissa of the crosspoint of frequency functions. Identification value of the prestress force is in good agreement with the test results. The method can accurately identify prestress force of externally prestressed concrete beam and trace the trend of effective prestress force.
Style APA, Harvard, Vancouver, ISO itp.
10

Zhang, Shan, Kai Yin Zhang, Bing Yang Xie i Zhong Lin Fan. "Research on the Mechanism of Prestressed Loss for Curving Hole of Prestressed Concrete Structure Caused by Frictional Resistance". Applied Mechanics and Materials 351-352 (sierpień 2013): 156–63. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.156.

Pełny tekst źródła
Streszczenie:
Excessive prestress loss in Prestressed Concrete (PC for short) continuous beam bridges and continuous rigid frame bridges cause structures to be different types of diseases. Based on theoretical analysis and experiment , this paper points out the imperfection of the effective prestress formula in Curving Hole at present. According to the research on the influencing factor of prestressed loss in Curving Hole of friction coefficient, it plays a remarkable role on the analysis about the prestressed loss in Curving Hole of prestressed concrete structure.
Style APA, Harvard, Vancouver, ISO itp.
Więcej źródeł

Rozprawy doktorskie na temat "Prestressed"

1

Davis, Brent M. "Evaluation of prestress losses in an innovative prestressed precast pavement system". Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4516.

Pełny tekst źródła
Streszczenie:
Thesis (M.S.) University of Missouri-Columbia, 2006.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 22, 2007) Includes bibliographical references.
Style APA, Harvard, Vancouver, ISO itp.
2

Xiang, Ziru. "Synergic identification of prestress and moving forces for prestressed concrete bridges". Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/116900/1/Ziru_Xiang_Thesis.pdf.

Pełny tekst źródła
Streszczenie:
This thesis is a comprehensive study of a synergic identification of prestress and moving forces for prestressed concrete bridges. An innovative synergic identification method is proposed, and validated by the numerical and experimental tests. Results illustrate that both moving/stationary excitation and the prestress force can be estimated accurately and stably for different kinds of bridges.
Style APA, Harvard, Vancouver, ISO itp.
3

Hodges, Hunter Thomas. "Top Strand Effect and Evaluation of Effective Prestress in Prestressed Concrete Beams". Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/36300.

Pełny tekst źródła
Streszczenie:
The first objective of this thesis was to assess the effect of casting orientation on bond strength in pretensioned prestressed concrete members. The "top strand effect" was evaluated through transfer and development length tests of prestressed concrete beams. Eight beams were cast with normal orientation, while four beams were cast with inverted orientation so that a significant depth of fresh concrete was placed below prestressing strands. Discrete transfer lengths were determined at the ends of each beam by measuring concrete surface strains. Inverted casting orientation caused an average 70 percent increase in transfer length. Some transfer lengths in beams with inverted casting orientation exceed current ACI and AASHTO code provisions. All measured transfer lengths were less than 90 strand diameters (45 in. for 0.5 in. diameter strands). Ranges of development length were determined through iterative load testing. The top strand effect on development length was more qualitative than quantitative. Ranges of development length in normal beams were conservatively less than code provisions. Ranges of development length in beams with inverted casting orientation were much closer to and sometimes exceeded code provisions. It is recommended that ACI and AASHTO code provisions for the development length of prestressing strand be modified to include the same magnification factors that are specified for the development length of deformed bars with twelve or more inches of fresh concrete placed below.

The second objective of this thesis was to compare experimentally measured prestress losses to theoretical calculations. Theoretical prestress losses were calculated according to PCI and AASHTO Refined methods. These methods produced similar results. Prestress losses were experimentally measured by vibrating wire gages and flexural load testing. Vibrating wire gages were used to monitor internal concrete strains. Two methods were used to reduce vibrating wire gage data: an upper/lower bound method and a basic method. The upper/lower bound method produced distorted data that was unreasonable in some cases. The basic method was more reasonable, but resulted in some prestress loss measurements that were greater than theoretical predictions. Flexural load testing was used to back calculate prestress losses from crack initiation and crack reopening loads. Prestress losses measured by crack initiation loads were generally greater than theoretical values. Losses measured by crack reopening loads were distorted. The distortion was attributed to difficulty in isolation of the correct crack reopening load. Large measurements of prestress losses by the basic vibrating wire gage and crack initiation methods suggested that losses occurred between the time when concrete was poured and prestress transfer occurred. Such losses are not accounted for in current code provisions. More research is recommended to determine the magnitude of these additional losses and their effect on design.
Master of Science

Style APA, Harvard, Vancouver, ISO itp.
4

Hussin, Manal Kamil. "Identification of prestress force in prestressed concrete box girder bridges using ultrasonic technology". Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/117669/8/Manal_Hussin_Thesis.pdf.

Pełny tekst źródła
Streszczenie:
This research was aimed to develop an ultrasonic technology to identify the prestressing force in new and exciting prestressed concrete box girder bridges. The research study included finite element analysis and laboratory testing of a scaled down prestressed concrete box-girder bridge model. New approaches for ultrasonic testing and prestressed force identification were developed and tested successfully.
Style APA, Harvard, Vancouver, ISO itp.
5

Ali, Hussam A. "Corrosion in prestressed concrete". Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79993.

Pełny tekst źródła
Streszczenie:
There is a need to enhance our understanding of the corrosion mechanisms and their effect on the level and loss of prestressing forces. This research program consisted of accelerated corrosion tests on eight prestressed concrete prisms, measuring 127 x 127 x 2,060 mm, with three different levels of prestress (0, 30, and 60% of the ultimate strength of prestressing strand). The aim of the investigation was to simulate and monitor the corrosion of prestressing strands in prestressed systems. The specimens were submerged in a saline solution and subjected to an impressed constant voltage, aimed at accelerating the corrosion of the strands.
During the corrosion period, various electrochemical tests were performed to monitor the corrosion activity as a function of elapsed time. Strains at selected locations were measured regularly to check the instantaneous level of prestress. At the end of the experiment, the prestressing strands were removed from the concrete, visually inspected, and weighed. They were also tested in tension to determine their residual tensile strength and their mode of failure.
An assessment of the electrochemical results did not point to any relationship between the initial levels of prestress and the corrosion activity. A similar observation was made in verifying the effect of the initial level of prestress on the corrosion activity as manifested in the residual tensile strength of the strands or their final measured weights.
This research program was therefore valuable to the practicing engineer in the design and maintenance of durable prestressed concrete structures. The findings confirmed that the risk and extent of corrosion in all prestressing strands in corrosive environments are roughly similar, regardless of the initial prestressing level.
Style APA, Harvard, Vancouver, ISO itp.
6

Nicklisch, Arndt W. 1975. "Adaptively prestressed concrete structures". Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9144.

Pełny tekst źródła
Streszczenie:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.
Includes bibliographical references (leaves 93-96).
Passive structures react effectively to only one dominant loading condition. Adaptive structures in contrast can deal with multiple loading conditions and unanticipated events at the same time. Truly adaptive civil structures do not exist. Concrete structures can be made adaptive through variable prestressing. Design concepts for an adaptive prestressed concrete girder are formulated in this research. Loading conditions and desired capabilities of the proposed system are defined. The system architecture is composed of sensors, a monitoring and control scheme, and actuators. These system components perform state identification, decision-making, and implementation of actions. Each system component is assigned requirements that are necessary to deal with all loading conditions in an appropriate way. Existing sensor technologies are explained and evaluated with respect to their capabilities to fulfill their functional requirements. A monitoring scheme is designed to interpret data assessed by the sensors for state identification. Adaptive control systems cannot be designed with conventional control algorithms. New control decision systems such as neural nets, expert systems, and fuzzy logic systems are needed for this task. Here, these systems are presented in general as forms of adaptive control. For each loading condition of the proposed system, a control strategy is developed. For the control of fluctuating live loads, a fuzzy logic based control scheme is proposed. Criteria for the selection of actuator technologies are given, and candidate actuator technologies are described and evaluated. Lastly, the problems associated with integrating the system components into a single system are discussed.
by Arndt W. Nicklisch.
S.M.
Style APA, Harvard, Vancouver, ISO itp.
7

Pathirage, Thisara Shamane. "Identification of prestress force in prestressed concrete box girder bridges using vibration based techniques". Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/112767/1/Thisara%20Shamane_Pathirage_Thesis.pdf.

Pełny tekst źródła
Streszczenie:
This research was aimed to develop a new vibration based non-destructive method to identify the effective prestress force in prestressed concrete box girder bridges. The research study included theoretical development, finite element analysis and laboratory testing of a scaled down box girder bridge model. A new approaches for vibration analysis of box girder bridge decks and prestress force identification were developed and tested successfully.
Style APA, Harvard, Vancouver, ISO itp.
8

Huthman, Ibrahim O. "3D Printing for Prestressed Concrete". Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1483544593929285.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
9

Umakanthan, Saravanan. "Mechanics of prestressed and inhomogeneous bodies". Texas A&M University, 2005. http://hdl.handle.net/1969.1/4241.

Pełny tekst źródła
Streszczenie:
In finite elasticity, while developing representation for stress, it is customary to require the reference configuration to be stress free. This study relaxes this requirement and develops representations for stress from a stressed reference configuration. Using the fact that the value of Cauchy stress in the current configuration is independent of the choice of the reference configuration, even though the formula used to compute it depends on the choice of the reference configuration, the sought representation is obtained. It is then assumed that there exists a piecewise smooth mapping between a configuration with prestresses and a configuration that is stress free, and the representation obtained above is used to study the mechanical response of prestressed bodies. The prestress fields are obtained by directly integrating the balance of linear momentum along with the traction free boundary condition. Then, different classes of boundary value problems for the type of inhomogeneous and prestressed bodies of interest are formulated and studied. For the cases studied, it is found that even the global measures like axial-load required to engender a given stretch ratio for a prestressed body vary from the homogeneous stress free bodies, though not significantly. The local measures - stress and deformation - in a prestressed body differ considerably from their homogeneous stress free counterparts. The above gained knowledge is applied to understand the mechanics of circumflex arteries obtained from normotensive and hypertensive micro-mini pigs. It is found that the deformation of these arteries when subjected to inflation and axial extension is not of the form r = r(R), µ = £, z = Z. Comparison is also made between the response of an artery at various levels of smooth muscle activation and stretch ratio as well as normotensive and hypertensive specimens, using statistical methods.
Style APA, Harvard, Vancouver, ISO itp.
10

Matthews, Debra Sue. "Blast effects on prestressed concrete bridges". Online access for everyone, 2008. http://www.dissertations.wsu.edu/Thesis/Summer2008/D_Matthews_072908.pdf.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
Więcej źródeł

Książki na temat "Prestressed"

1

Ieşan, D. Prestressed bodies. Harlow: Longman Scientific & Technical, 1989.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
2

A, Faulkes K., red. Prestressed concrete. Wyd. 2. Melbourne: Longman Cheshire, 1988.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
3

Prestressed concrete. Harrow, U.K: Alpha Science International, 2005.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
4

Dolan, Charles W., i H. R. Hamilton. Prestressed Concrete. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-97882-6.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
5

Prestressed concrete. Pangbourne: Alpha Science, 2002.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
6

Prestressed bodies. Harlow, Essex, England: Longman Scientific, 1989.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
7

Prestressed concrete technology. Budapest: Akadémiai Kiadó, 1986.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
8

Collins, Michael P. Prestressed concrete basics. Ottawa: Canadian Prestressed Concrete Institute, 1987.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
9

Prestressed concrete design. Wyd. 2. London: E & FN Spon, 1998.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
10

Prestressed concrete design. London: Chapman and Hall, 1988.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
Więcej źródeł

Części książek na temat "Prestressed"

1

Dolan, Charles W., i H. R. Hamilton. "Basic Concepts". W Prestressed Concrete, 1–30. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_1.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
2

Dolan, Charles W., i H. R. Hamilton. "Composite Beams". W Prestressed Concrete, 283–300. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_10.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
3

Dolan, Charles W., i H. R. Hamilton. "Two-Way Slabs". W Prestressed Concrete, 301–29. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_11.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
4

Dolan, Charles W., i H. R. Hamilton. "Axially Loaded Members". W Prestressed Concrete, 331–42. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_12.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
5

Dolan, Charles W., i H. R. Hamilton. "Spliced Girders". W Prestressed Concrete, 343–68. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_13.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
6

Dolan, Charles W., i H. R. Hamilton. "Strut-and-Tie Method". W Prestressed Concrete, 369–85. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_14.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
7

Dolan, Charles W., i H. R. Hamilton. "Connections and Anchoring to Concrete". W Prestressed Concrete, 387–423. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_15.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
8

Dolan, Charles W., i H. R. Hamilton. "Comprehensive Problems". W Prestressed Concrete, 425–32. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_16.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
9

Dolan, Charles W., i H. R. Hamilton. "Prestressed Concrete Applications". W Prestressed Concrete, 31–61. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_2.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
10

Dolan, Charles W., i H. R. Hamilton. "Materials". W Prestressed Concrete, 63–84. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_3.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.

Streszczenia konferencji na temat "Prestressed"

1

Yang, H. D., i L. Y. Fu. "Acoustoelastic Simulation of Wave Propagation in Different Prestressed Media". W International Geomechanics Symposium. ARMA, 2022. http://dx.doi.org/10.56952/igs-2022-005.

Pełny tekst źródła
Streszczenie:
Abstract Insight into wave propagation in prestressed media is of importance to geophysical applications such as monitoring changes in geopressure and tectonic stress. This issue can be approached by the theory of acoustoelasticity that accounts for nonlinear strain responses due to stresses of finite magnitude. In this study, a rotated staggered-grid finite-difference (RSG-FD) method with an unsplit convolutional perfectly matched layer (CPML) absorbing boundary is used to solve the relevant acoustoelastic equations with third-order elastic constants for elastic wave propagation in prestressed media. Numerical acoustoelasticity simulations for wave propagation in single- and double-layer models are performed under four states of prestresses, confining, uniaxial, pure-shear, and simple-shear. The results display the effective anisotropy of elastic wave propagation in acoustoelastic media, illustrating that the prestress-induced velocity anisotropy is of orthotropic features that are strongly related to the orientation of prestresses. These examples demonstrate the significant impact of prestress conditions on seismic responses in both phase and amplitude. Introduction The impact of prestressed zones on seismic waves is an important issue that affects the interpretation of the results by seismic imaging and inversion. It is well known that acoustic velocities in rocks are sensitive to prestresses. The theory of acoustoelasticity, as an extension of the classical theory of elasticity, is set up under the framework of hyperelasticity (Shams et al., 2011). The theory relates elastic moduli to prestresses (or residual stresses) in solids (Pao and Gamer, 1985), resulting in an effective anisotropy for wave propagation in acoustoelastic media. It has been used to account for stress-induced velocity variations in rocks (Johnson and Shankland, 1989), therefore perhaps providing the potential to understand the acoustic response to in-situ stresses (Sinha and Kostek, 1996; Huang et al., 2001) and, in turn, to monitor changes in geopressure and tectonic stress. Theoretical and experimental investigations of acoustoelasticity for wave propagation in prestressed rocks have made great signs of progress, but with limited literature on numerical simulations for acoustoelastic wave propagation. As a useful complement to the theoretical solutions of acoustoelastic equations, numerical acoustoelasticity simulations are thought to provide further insights into the stress-induced variations in velocity and anisotropy.
Style APA, Harvard, Vancouver, ISO itp.
2

Cai, Dahua, Yonghuan Wang, Jiangtao Zhang, Lin Yang, Hua Rong, Jiwa Li i Zhiming Wu. "Prestressed Time-Limited Aging Analyses of Concrete Containment Structure". W 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-67107.

Pełny tekst źródła
Streszczenie:
For prestressed concrete containment structure, prestress loss is a key factor that affects the performance of containment structure. Therefore, prestressed time-limited aging analysis (TLAA) is essential for containment structures. The main objective of prestressed TLAA is to assess the safety of containment structures after prestress loss occurred over time. This paper takes the in-service containment structure as an example to investigate the method of TLAA for grounted prestressed containment structure. Firstly, it introduces methods for prestressed TLAA. Secondly, a finite element model of containment structure is established to calculate the minimum required value (MRV) of prestress. The numerical model is verified by the pressure test results. Thirdly, prestress loss of tendons is calculated. Finally, the residual prestress of tendons are compared with the MRV of prestress to confirm whether the containment can service in a certain period. This study can provide guidance for goouted prestressed TLAA of containment structures.
Style APA, Harvard, Vancouver, ISO itp.
3

"Applying Prestressed CFRP Sheets to Restore Prestress Losses in Prestressed Concrete Beams". W SP-245: Case Histories and Use of FRP for Prestressing Applications. American Concrete Institute, 2007. http://dx.doi.org/10.14359/18765.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
4

Zdanowicz, Katarzyna, Boso Schmidt, Hubert Naraniecki i Steffen Marx. "Bond behaviour of chemically prestressed textile reinforced concrete". W IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/guimaraes.2019.0297.

Pełny tekst źródła
Streszczenie:
<p>The bond behaviour of concrete specimens with carbon textile reinforcement was investigated in the presented research programme. Pull-out specimens were cast from self-compacting concrete with expansive admixtures and in this way chemical prestress was introduced. The aim of the research was to compare bond behaviour between prestressed specimens and non-prestressed control specimens. During pull-out tests, the pull-out force and notch opening were measured with a load cell and laser sensors. Further, bond - slip and pull-out force - crack width relationships were drawn and compared for prestressed and non-prestressed specimens. Chemically prestressed specimens reached 24% higher bond strength than non-prestressed ones. It can be therefore concluded, that chemical prestressing positively influences the bond behaviour of concrete with textile reinforcement and thus better utilisation of its properties can be provided.</p>
Style APA, Harvard, Vancouver, ISO itp.
5

"Prestressed beam". W SP-208: Examples for the Design of Structural Concrete with Strut-and-Tie Models. American Concrete Institute, 2002. http://dx.doi.org/10.14359/12419.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
6

Zhong, Hai, i Mijia Yang. "Effect of Prestress on Bridge–Vehicle Interactions". W ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51757.

Pełny tekst źródła
Streszczenie:
Prestress applied on bridges affects the dynamic interaction between bridges and vehicles traveling over them. In this paper, the prestressed bridge is modeled as a beam subjected to eccentric prestress force at the two ends, and a half-vehicle model with 4 degrees of freedom is used to represent the vehicle passing the bridge. A new bridge–vehicle interaction model considering the effect of prestress with eccentricity is developed through the principle of virtual work. The correctness and accuracy of the model are validated with literature results. Based on the developed model, numerical simulations have been conducted using the Newmark’s β method to study the effects of vehicle speed, eccentricity and amplitude of the prestress, and presence of multiple vehicles. It is shown that prestress has an important effect on the maximum vertical acceleration of vehicles, which may provide a good index for detecting the change of prestress. It is also interesting to find that the later-entering vehicle on the prestressed bridge will largely reduce the maximum vertical acceleration of the vehicle ahead of it.
Style APA, Harvard, Vancouver, ISO itp.
7

Scott, James D., Aaron A. Robertson, Robert J. Peterman, B. Terry Beck, Kyle A. Riding i John Wu. "Determining the Remaining Prestress Force in a Prestressed Concrete Crosstie". W 2017 Joint Rail Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/jrc2017-2287.

Pełny tekst źródła
Streszczenie:
The research presented herein focuses on determining the amount of internal prestressing force and bending resistance that is necessary to provide a durable long-term concrete railroad tie. In order to accomplish this, the researchers conducted a systematic evaluation of existing concrete ties that successfully withstood over 25 years of service in track. An experimental method for determining the remaining prestress force in these existing prestressed concrete railroad ties is currently under development. The ties are first loaded in the upside-down orientation, with supports located at the rail seats, and two point loads applied at the center of the tie. A loading rate of 1,000 lb/min was used to initiate flexural cracking in the center of the tie. Once cracking was observed, the ties underwent 200 cycles of loading to reduce the friction between the prestressing tendons and the concrete. When the cycling was completed, the existing crack was instrumented with an extensometer to measure the Crack Opening Displacement (COD). The ties were loaded once more at 1,000 lb/min to develop a Load vs. COD relation. A systematic method of determining the load required to reopen the crack from the Load vs. COD relation is being developed using ties cast at a manufacturing plant that were instrumented with internal vibrating-wire strain gages. Using the load required to reopen the crack, along with the known cross-sectional properties at the center of the tie, the remaining prestress force is calculated through equilibrium of forces. This method allows for the determination of the remaining prestress force in a member with known section properties to be obtained through load testing.
Style APA, Harvard, Vancouver, ISO itp.
8

Capilla, F. "Prestressed bridge elements". W International RILEM Workshop on Test and Design Methods for Steelfibre Reinforced Concrete. RILEM Publications SARL, 2003. http://dx.doi.org/10.1617/2351580168.013.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
9

"Externally Prestressed Bridges". W SP-120: External Prestressing in Bridges. American Concrete Institute, 1990. http://dx.doi.org/10.14359/3286.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
10

Shin, Moochul, i Hailing Yu. "Numerical Evaluation of Splitting Performance of Prestressed Concrete Prisms With Larger Diameter Prestressing Wires". W 2019 Joint Rail Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/jrc2019-1315.

Pełny tekst źródła
Streszczenie:
This numerical study focuses on evaluating the structural performance of prestressed concrete prisms with larger diameter (0.315 in) prestressing wires. More commonly used prestressing wires are the 0.209 in (5.32 mm) diameter wires for prestressed concrete crossties. However, there has been an interest to adopt larger diameter prestressing wires in order to provide higher prestress forces with the aim of mitigating the structural damage of prestressed concrete crossties. Previous experimental studies demonstrated that small-scale pretensioned concrete prisms had excellent correlation in bonding performance of concrete ties pretensioned with 0.209 in (5.32 mm) wires or three- or seven-wire strands. Using a finite element (FE) modeling approach, this study investigates the effects of 8 mm diameter prestressing wires on the splitting/bursting performance of prisms at the onset of de-tensioning of the wires. The studied parameters include geometrical/mechanical parameters such as thickness of the concrete cover, spacing between the wires, level of prestress forces, and concrete release strength in compression. Cohesive elements with a newly developed nonlinear bond-slip model are assigned to the interface between the prestressing wires and the surrounding concrete. The parameters for the bond-slip model are calibrated based on a simple pull-out test on concrete cylinders with the 0.315 in (8 mm) diameter wires. The simulation results are compared with the predicted splitting performance of prisms pretensioned with 0.209 in (5.32 mm) wires or seven-wire strands. Based on the FE analysis results, recommendations are made on the minimum concrete cover thickness and wire spacing required to achieve acceptable splitting/bursting performance in prestressed concrete prisms.
Style APA, Harvard, Vancouver, ISO itp.

Raporty organizacyjne na temat "Prestressed"

1

Johnson, Frank R. PRESTRESS User's Guide. Beta Version. Prestressed Concrete Beam Design and Analysis. Fort Belvoir, VA: Defense Technical Information Center, sierpień 1989. http://dx.doi.org/10.21236/ada236739.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
2

Yuan, Robert L. Prestressed Concrete Column Behavior. Precast/Prestressed Concrete Institute, 1989. http://dx.doi.org/10.15554/pci.rr.comp-022.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
3

ABAM ENGINEERS INC FEDERAL WAY WA. Prestressed Concrete Fender Piles: Final Designs. Fort Belvoir, VA: Defense Technical Information Center, grudzień 1987. http://dx.doi.org/10.21236/ada190695.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
4

Carinci, Craig A., i Grant T. Halvorsen. Tie Requirements for Prestressed Concrete Columns. Precast/Prestressed Concrete Institute, 1986. http://dx.doi.org/10.15554/pci.rr.comp-024.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
5

D’Arcy, Thomas J., Walter I. Korkosz i Larbi Sennour. Durability of Precast Prestressed Concrete Structures. Precast/Prestressed Concrete Institute, 1995. http://dx.doi.org/10.15554/pci.rr.mat-007.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
6

Warren, G. Laterally Loaded Partially Prestressed Concrete Piles. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 1989. http://dx.doi.org/10.21236/ada215144.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
7

Zhang, Y. X., Q. G. Li, K. Jiang i Y. Sun. COMPARATIVE ANALYSIS OF RESILIENT PRESTRESSED STEEL FRAMES. The Hong Kong Institute of Steel Construction, grudzień 2018. http://dx.doi.org/10.18057/icass2018.p.108.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
8

Littlefield, Andrew, Edward Hyland i Jack Keating. Prestressed Carbon Fiber Composite Overwrapped Gun Tube. Fort Belvoir, VA: Defense Technical Information Center, październik 2008. http://dx.doi.org/10.21236/ada634824.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
9

Littlefield, Andrew, i Edward Hyland. Prestressed Carbon Fiber Composite Overwrapped Gun Tube. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2006. http://dx.doi.org/10.21236/ada588304.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
10

Cojocaru, Razvan. Lifting Analysis of Precast Prestressed Concrete Beams. Precast/Prestressed Concrete Institute, 2012. http://dx.doi.org/10.15554/pci.rr.misc-002.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
Możesz być także zainteresowany rozszerzonymi bibliografiami na temat „Prestressed” dla poszczególnych typów źródeł:
Artykuły w czasopismach Rozprawy doktorskie Książki
Oferujemy zniżki na wszystkie plany premium dla autorów, których prace zostały uwzględnione w tematycznych zestawieniach literatury. Skontaktuj się z nami, aby uzyskać unikalny kod promocyjny!

Do bibliografii