Bibliographies thématiques / Long Cable

Littérature scientifique sur le sujet « Long Cable »

Auteur : Grafiati
Publié le 14 mars 2023

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Articles de revues sur le sujet "Long Cable"

1

Liu, Yue, Mingyang Gu, Xiaogang Liu et T. Tafsirojjaman. « Life-Cycle Cost Analysis of Long-Span CFRP Cable-Stayed Bridges ». Polymers 14, no 9 (25 avril 2022) : 1740. http://dx.doi.org/10.3390/polym14091740.

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With the advantages of high strength, light weight, high corrosion and fatigue resistance, and low relaxation, carbon-fiber-reinforced polymer (CFRP) is an excellent cable material for cable-stayed bridges. However, the relatively high unit price of CFRP compared to that of steel may hinder the large-scale application of CFRP stay cables. This paper presents the economic comparison between long-span cable-stayed bridges using CFRP cables and the corresponding steel cable-stayed bridges through life-cycle cost analysis (LCCA). Three CFRP cable-stayed bridges with a main span of 600 m, 1200 m, and 1800 m, respectively, along with their steel counterparts, were designed, and their life-cycle costs (LCCs) were calculated. The comparison of LCCs was not only between the CFRP and steel cable-stayed bridges with the same span, but also between the cable-stayed bridges with different spans. Furthermore, the different unit prices of CFRP cables and different replacement frequencies of steel cables were also investigated. The results show that the initial design and construction cost of the long-span CFRP cable-stayed bridge is higher than that of the corresponding steel cable-stayed bridge, although using CFRP cables can reduce the materials used, primarily due to the higher unit price of the CFRP cable. Despite the higher initial cost, the long-span CFRP cable-stayed bridge can still achieve lower LCC than the steel cable-stayed bridge, because it has significantly lower rehabilitation cost and user cost, as well as slightly lower vulnerability cost. Furthermore, with the increase in the main span and the decrease in the unit price of CFRP cables, the LCC advantage of the long-span CFRP cable-stayed bridge becomes more obvious.
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Liu, Yue, Mingyang Gu, Xiaogang Liu et T. Tafsirojjaman. « Life-Cycle Cost Analysis of Long-Span CFRP Cable-Stayed Bridges ». Polymers 14, no 9 (25 avril 2022) : 1740. http://dx.doi.org/10.3390/polym14091740.

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With the advantages of high strength, light weight, high corrosion and fatigue resistance, and low relaxation, carbon-fiber-reinforced polymer (CFRP) is an excellent cable material for cable-stayed bridges. However, the relatively high unit price of CFRP compared to that of steel may hinder the large-scale application of CFRP stay cables. This paper presents the economic comparison between long-span cable-stayed bridges using CFRP cables and the corresponding steel cable-stayed bridges through life-cycle cost analysis (LCCA). Three CFRP cable-stayed bridges with a main span of 600 m, 1200 m, and 1800 m, respectively, along with their steel counterparts, were designed, and their life-cycle costs (LCCs) were calculated. The comparison of LCCs was not only between the CFRP and steel cable-stayed bridges with the same span, but also between the cable-stayed bridges with different spans. Furthermore, the different unit prices of CFRP cables and different replacement frequencies of steel cables were also investigated. The results show that the initial design and construction cost of the long-span CFRP cable-stayed bridge is higher than that of the corresponding steel cable-stayed bridge, although using CFRP cables can reduce the materials used, primarily due to the higher unit price of the CFRP cable. Despite the higher initial cost, the long-span CFRP cable-stayed bridge can still achieve lower LCC than the steel cable-stayed bridge, because it has significantly lower rehabilitation cost and user cost, as well as slightly lower vulnerability cost. Furthermore, with the increase in the main span and the decrease in the unit price of CFRP cables, the LCC advantage of the long-span CFRP cable-stayed bridge becomes more obvious.
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Kuihua, Mei, Sun Shengjiang, Jin Guoqing et Sun Yamin. « Static and Dynamic Mechanical Properties of Long-Span Cable-Stayed Bridges Using CFRP Cables ». Advances in Civil Engineering 2017 (2017) : 1–11. http://dx.doi.org/10.1155/2017/6198296.

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The elastic modulus and deadweight of carbon fiber-reinforced polymer (CFRP) cables are different from those of steel cables. Thus, the static and dynamic behaviors of cable-stayed bridges using CFRP cables are different from those of cable-stayed bridges using steel cables. The static and dynamic performances of the two kinds of bridges with a span of 1000 m were studied using the numerical method. The effects of geometric nonlinear factors on static performance of the two kinds of cable-stayed bridges were analyzed. The live load effects and temperature effects of the two cable-stayed bridges were also analyzed. The influences of design parameters, including different structural systems, the numbers of auxiliary piers, and the space arrangement types of cable, on the dynamic performance of the cable-stayed bridge using CFRP cables were also studied. Results demonstrate that sag effect of the CFRP cable is much smaller than that of steel cable. The temperature effects of CFRP cable-stayed bridge are less than those of steel cable-stayed bridge. The vertical bending natural vibration frequency of the CFRP cable-stayed bridge is generally lower than that of steel cable-stayed bridge, whereas the torsional natural vibration frequency of the former is higher than that of the latter.
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Wang, Zhi Hao. « Experimental Study on Multi-Mode Vibration Control of a Stay Cable with a Passive Magnetorheological Damper ». Applied Mechanics and Materials 361-363 (août 2013) : 1402–5. http://dx.doi.org/10.4028/www.scientific.net/amm.361-363.1402.

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Effective vibration control technology for stay cables is extremely critical to safe operations of cable-stayed bridges. For super-long cables, passive linear damper cannot provide sufficient damping since it can be only optimum for a given mode of cable, while a long cable may vibrate with several modes. This paper focuses on multi-mode vibration control of stay cables with passive magnetorheological (MR) dampers. Firstly, a 21.6m-long model cable was designed and established in the laboratory.Then, control performance of the cable with a passive MR damper was tested. The test results show that modal damping ratios of the cable in the first four modes can be improved significantly with the MR damper. It is further demonstrated that optimal tuned passively operated MR damper can outperform the passive viscous damper.
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Morimitsu, Takenori, et Masao Terasawa. « Long-Distance Optical Fiber Cable Installation System Using Automatic Control Puller ». Journal of Robotics and Mechatronics 10, no 3 (20 juin 1998) : 229–34. http://dx.doi.org/10.20965/jrm.1998.p0229.

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To fully use optical fiber cable features such as low loss, small diameter, and light weight, cables are installed over the longest possible unit distance using pullers installed in intermediate manholes to distribute cable pulling force. An optical fiber cable pulling system has been developed that measures loading tension on the cable using tension sensors and automatically controls pulling speed so that tension is appropriate.
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Stuklis, Arturs, Dmitrijs Serdjuks et Vadims Goremikins. « Materials Consumption Decrease for Long-Span Prestressed Cable Roof ». Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (16 juin 2015) : 209. http://dx.doi.org/10.17770/etr2015vol1.231.

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<p class="R-AbstractKeywords"><span lang="EN-US">Limited raw materials and energy resources are actual national economy problems which can be solved by the decrease of weight, increase of span and durability of load bearing structures. The largest structural spans were achieved by application of cable structures. The roofs are one of the most widely used in practice type of cable structures. However, increased deformability and necessity of the special methods of stabilizing are significant cable roofs disadvantages. The prestressing of one or several groups of cables is one of the probable methods for stabilizing of cable roofs. According to the recommendations available in the literature, all cables of the roof must be prestressed by the equal forces. But after applying of design vertical load, values of the forces, acting in the cables of the roof, changes within the wide limits. So, using of structural materials will not be rational in this case, taking into account, that the cables cross-sections are constant because the cables cross-sections were determined basing on the maximum axial force, acting in the all cables.</span></p><p class="R-AbstractKeywords"><span lang="EN-US">Possibility to decrease materials consumption by the changing of prestressing forces for cables of the roof was checked on the example of saddle-shaped cable roof with the rigid support contour and dimensions 60x60 m in the plan. Initial deflections of main suspension and stressing cables of the roof were equal to 7m. Suspension and stressing cables of the net were placed with the step equal to 2.828 m. Steel ropes with modulus of elasticity in 1.5∙105 MPa were considered as a material of suspension and stressing cables of the roof. Suspension and stressing cables were divided into the groups, which are differed by the prestressing forces. Amount of cables groups changes within the limits from 1 to 27. Values of prestressing forces for cables groups change within the limits from 20 to 80% from the cables breaking force. </span></p><p class="R-AbstractKeywords"><span lang="EN-US">The dependences of material consumption and maximum vertical displacements of cable roof on the amount of cables groups and prestressing forces were determined as second power polynomial equations. It was stated, that division of suspension and stressing cables on the 18 groups enables to decrease cables material consumption by 19.2%. Values of prestressing forces for suspension and stressing cables of the roof were equal to 57 and 80 %, from it load-carrying capacity, correspondingly</span><span lang="EN-US">. </span></p>
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Kim, Y. H., J. K. Vandiver et R. Holler. « Vortex-Induced Vibration and Drag Coefficients of Long Cables Subjected to Sheared Flows ». Journal of Energy Resources Technology 108, no 1 (1 mars 1986) : 77–83. http://dx.doi.org/10.1115/1.3231245.

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The vortex-induced vibration response of long cables subjected to vertically sheared flow was investigated in two field experiments. In a typical experiment, a weight was hung over the side of the research vessel by a cable that was instrumented with accelerometers. A typical experiment measured the acceleration response of the cable, the current profile, the tension, and angle of inclination at the top of the cable. Total drag force was computed from the tension and angle measurements. Two braided Kevlar cables were tested at various lengths from 100 to 9,050 ft. As a result of these experiments, several important conclusions can be drawn: (i) the wave propagation along the length of the cable was damped, and therefore, under most conditions the cable behaved like an infinite string; (ii) response spectra were quite broad-band, with center frequencies determined by the flow speed in the region of the accelerometer; (iii) single mode lock-in was not observed for long cables in the sheared current profile; (iv) the average drag coefficient of long cables subjected to sheared flow was considerably lower than observed on short cables in uniform flows; (v) the r.m.s. response was higher in regions of higher current speed. A new dimensionless parameter is proposed that incorporates the properties of the cable as well as the sheared flow. This parameter is useful in establishing the likelihood that lock-in may occur, as well as in estimating the number of modes likely to respond.
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WANG, XIN, et ZHISHEN WU. « VIBRATION CONTROL OF DIFFERENT FRP CABLES IN LONG-SPAN CABLE-STAYED BRIDGE UNDER INDIRECT EXCITATIONS ». Journal of Earthquake and Tsunami 05, no 02 (juin 2011) : 167–88. http://dx.doi.org/10.1142/s1793431111000991.

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To identify the vibration characteristics and potential vibration control of different fiber reinforced polymer (FRP) cables for long-span cable-stayed bridges, the critical resonant responses of these cables under indirect excitations including external and parametric excitations are studied in this paper. Based on theoretical equations, the primary resonant responses of different cables under indirect excitations were first calculated and compared, afterwards the influence of cable length and design stress to the resonant responses and the importance of external and parametric excitations were further studied. Analysis of results show that all of the FRP cables measuring 575 m in length possess lower resonant responses compared with steel cables, while the hybrid FRP cable with smart dampers exhibits even lower responses than the other FRP cables. Moreover, the external excitation induced resonance will become critical for some kinds of FRP cables with increasing cable length. A method on adjusting design stresses mitigates this critical resonance and benefits vibration control of FRP cables. In addition, parametric excitation plays a more important role in resonant responses for short-length cables in comparison to external excitation, whereas both parametric and external excitations are critically important for long-length cables.
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An, Yonghui, Yue Zhong, Yanbin Tan et Jinping Ou. « Experimental and numerical studies on a test method for damage diagnosis of stay cables ». Advances in Structural Engineering 20, no 2 (28 juillet 2016) : 245–56. http://dx.doi.org/10.1177/1369433216659927.

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To diagnose the state of stay cables, a vibration-based model-free damage diagnosis method of stay cables using the changes in natural frequencies is further proposed and validated. The structural frequency is rapidly and easily acquired; moreover, it is simple and reliable for damage diagnosis. The frequency would change after the stay cable is damaged, so the frequency change could be used as the damage index. However, the stay cables are very long in long-span cable-stayed bridges, and their frequencies are very small; the frequency change due to small damage of the stay cable would be submerged by the surrounding noise and error of parameter identification process. A temporary diagonal steel bar–based method is used to solve this issue. The steel bar is installed with one end on the stay cable close to the bottom anchor head and the other end on the bridge deck; thus, the stay cable is divided into a short part and a long part by the steel bar. The frequency of a stay cable with a given tension force increases with the decrease in its length; according to the qualitative analysis, the frequency of the short part increases dramatically, and the local frequency change of the short part due to the same damage in the whole stay cable is amplified dramatically; thus, the small damage of a stay cable can be diagnosed easily. Numerical simulations of a stay cable selected from a cable-stayed bridge and a laboratorial stay cable are used to validate the method and also give a recommended rule for design of the temporary diagonal steel bar; experimental validation has also been conducted. All the results indicate that the proposed method works very well in damage diagnosis of stay cables. The proposed method is an output-only, model-free, fast and economical damage diagnosis method for stay cables.
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Wang, Long Fei, et Mu Yu Liu. « Effects of Stable Cable on Ultimate Load-Carrying Capacity of Long-Span Composite Girder Cable-Stayed Bridge with Three Pylons ». Advanced Materials Research 163-167 (décembre 2010) : 2337–42. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.2337.

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On the background of a long-span composite girder cable-stayed bridge with three pylons under construction for research, this paper establishes two models of the whole bridge by considering the structural geometric nonlinearity, material nonlinearity and interface slip effect in composite girder, one has stable cables between pylons but the other hasn’t, then comparatively studies the failure loads and structural internal forces of the two models to achieve effects of stable cable on the ultimate load-carrying capacity of the cable-stayed bridge. This research shows that the stable cables can strengthen the vertical stiffness of structure and obviously increase the failure load of the bridge, and the internal forces in main girder, middle pylon and stayed cables are smaller and their distributions are more reasonable under the failure load than those in the bridge with no stable cables, so the stable cables can effectively improve the ultimate load-carrying capacity of long-span composite girder cable-stayed bridges with three pylons.
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Thèses sur le sujet "Long Cable"

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Scotti, Andrea 1978. « Long term behavior of cable strayed bridges ». Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/29408.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2004.
Includes bibliographical references (leaf 46).
In the design of a structure, one of the most difficult parameter to assess is how the initial condition of a structure will change with time. During its life span, a structure can be subjected to different loads, changes in geometric configuration and even changes in its mechanical properties. Among all factors that can affect the geometrical reconfiguration of a structure (i.e. settlements and overloads) creep is one of the most important given its inevitability and because of its persistent effects (normally estimated as ten thousand days). Due to the effect of creep, a structure tends to amplify its deformation under a given load condition over time, and the final deformation can even reach values five or six time grater than the initial ones. During the design, the fact that deformations grow with time can be a difficult condition especially for highly indeterminate structures like cable stayed bridges where the stresses are related to the geometric configuration of the structure itself. In concrete cable stayed bridges, in fact, the increase in the deformation of the deck and the pylons over time leads to a decrease in the initial tension in the stays with an obvious difficulty in the design phase of the structure. The first chapter of this thesis illustrates and explains one approximate method used to estimate the effect of creep on a concrete structure. The method proposed in this thesis is the "Age-Adjusted Effective Modulus Method". It was chosen among others because it is one of the most commonly used, and because it is highly accessible.
(cont.) In the second chapter, the Age-Adjusted Effective Modulus Method will be used in conjunction with the force method to study non homogeneous, indeterminate structure under the effect of creep. In this chapter a procedure will be introduced that enables the calculation of an initial value of the prestressing force in the stays that elides the effect of creep on tension. Bridge in Maine, USA (M.Eng Project. Alexander Otenti, Andrea Scotti, Richard Unruh III, 2004). The theory exposed in this thesis is a very powerful procedure that permits to simplification of the problem of creep in cable-stayed bridges, with easy calculations and with an iterative procedure.
by Andrea Scotti.
M.Eng.
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Xiang, Yang. « Static and Dynamic Analyses of a Long-Span Cable-Stayed Bridge with Corroded Cables ». Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/38446.

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This study investigates the static behavior and dynamic behavior of the Stonecutters Cable-Stayed Bridge, which is the third longest cable-stayed bridge in the world, when a group of 8 cables is damaged by corrosion. In this thesis, the reduction in cable cross-section area is used to simulate the corrosion level. The corroded cables are divided into 2 groups of 4 cables, arranged in symmetric and asymmetric distributions on both decks. A finite element bridge model was employed to perform the analysis. The validation of the model was established by comparing numerical results to the published results of the bridge. The model was then subjected to gravity load only to check the effects of corrosion level, the distance of the corroded cables and the distribution of the damaged cables on the decks’ deflection and cable stresses change. In the dynamic analysis, the natural frequencies and mode shapes were compared with a reference case with no corrosion-damaged cables. A recorded wind load was applied on the deck to investigate the time-history response of the mid-span in the horizontal, vertical and torsional directions, and of the tower top in the horizontal direction. Moreover, frequency analysis was performed on the time-history response, and coupled motions at certain frequencies were observed. Numerical results as the ones presented in this thesis can complement information gathered from non-destructive testing technology in detecting corrosion-damaged stay-cables in cable-stayed bridges.
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Matsumoto, Tsuyoshi. « Study of Long Span Bridge Design Based on Long Term Maintenance in Developing Countries ». Kyoto University, 2020. http://hdl.handle.net/2433/253250.

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Millers, Kenneth G. « Long term performance of low voltage aerial bundled cable ». Thesis, Queensland University of Technology, 1995. https://eprints.qut.edu.au/36235/1/36235_Millers_1995.pdf.

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The objective of this research is to identify and evaluate factors which may influence the long-term performance of the low voltage aerial bundled cable system erected within the boundaries of the South East Queensland Electricity Board's area of supply. Field inspections of a number of in-service installations were carried out which identified a range of problems relating to the corrosion of bolts and ABC conductor cores when erected in close proximity to surf beaches. The scope of the project was restricted to an investigation related to the ABC system's resistance to corrosion, its limits of electrical and mechanical performance, and the degradation of materials due to exposure to ultraviolet radiation. Abrasion and vibration in the ABC system was not envisaged to be a major factor in limiting the long-term performance of the system. The course of the research identified the major mechanism by which moisture and pollutants are permitted to enter conductor cores at insulation piercing connector sites. The testing program showed that insulation piercing connectors were unable to prevent the ventilation of air in the interstices within the stranded conductor core under the action of air pressure differentials being caused by increases and decreases of cable temperature. The research also showed that the XLPE insulation of the conductors can be damaged when the system is subjected to certain overload and short circuit conditions. A methodology has been developed which can define the mechanical limits of the XLPE insulation by the use of "kneeing curves". This allows a process to be used which will enable an appropriate size of low voltage fuse to be selected for protection of the insulation under overload and short circuit conditions. Photomicrographs of samples of XLPE insulation recovered from inservice applications show that some cable insulation has been manufactured with poor carbon black dispersion, but the degrading effects of ultraviolet radiation have not been determined. A number of conclusions and recommendations can be made as a result of this research which have the potential to significantly improve the long term performance of low voltage aerial bundled cable.
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Shoghijavan, Mohammad [Verfasser]. « Progressive Collapse in Long-Span Cable-Supported Bridges / Mohammad Shoghijavan ». Berlin : epubli, 2020. http://d-nb.info/121979502X/34.

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Hodgson, D. A. « The short and long term electric strength of polyethylene insulation ». Thesis, University of Southampton, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384272.

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Cheng, Shaohong. « Structural and aerodynamic stability analysis of long-span cable-stayed bridges ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0022/NQ52316.pdf.

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Cheng, Shaohong Carleton University Dissertation Engineering Civil and Environmental. « Structural and aerodynamic stability analysis of long-span cable-stayed bridges ». Ottawa, 1999.

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9

Grimmelsman, Kirk Alexander Aktan A. E. « Experimental characterization of towers in cable-supported bridges by ambient vibration testing / ». Philadelphia, Pa. : Drexel University, 2006. http://hdl.handle.net/1860/1222.

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Guo, Yi. « Long-term Behavior of the Veteran’s Glass City Skyway Cable Stayed Bridge ». University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1302277396.

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Livres sur le sujet "Long Cable"

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Office, General Accounting. Telecommunications : The effect of competition from satellite providers on cable rates : report to Congressional requesters. Washington, D.C. (P.O. Box 37050, Washington, D.C. 20013) : The Office, 2000.

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Office, General Accounting. Telecommunications : The effect of competition from satellite providers on cable rates : report to congressional requesters. Washington, D.C. (P.O. Box 37050, Washington, D.C. 20013) : The Office, 2000.

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Office, General Accounting. Telecommunications : The effect of competition from satellite providers on cable rates : report to Congressional requesters. Washington, D.C : The Office, 2000.

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Office, General Accounting. Telecommunications : Impact of sports programming costs on cable television rates : report to the Honorable Byron L. Dorgan, U.S. Senate. Washington, D.C. (P.O. Box 37050, Washington 20013) : The Office, 1999.

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5

LeDoux, Chris B. Estimating yarding costs for the Clearwater cable yarder. Broomall, PA : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1987.

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1996, New Jersey Legislature Senate Special Study Committee on the Federal Telecommunications Act of. Committee meeting of Senate Special Study Committee on the Federal Telecommunications Act of 1996 : Organizational meeting to hear from the Board of Public Utilities and invited representatives of local and long distance telephone companies, and of cable television companies. Trenton, N.J : The Committee, 1996.

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Office, General Accounting. Telecommunications : Financial information on 16 telephone and cable companies : fact sheet for the Chairman, Committee on Commerce, Science and Transportation, U.S. Senate. Washington, DC : U.S. General Accounting Office, 1994.

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Office, General Accounting. Telecommunications : The changing status of competition to cable television : report to the Subcommittee on Antitrust, Business Rights, and Competition, Committee on the Judiciary, U.S. Senate. Washington, D.C. (P.O. Box 37050, Washington, D.C. 20013) : The Office, 1999.

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Office, General Accounting. Telecommunications : Issues related to competition and subscriber rates in the cable television industry : report to the Chairman, Committee on Commerce, Science, and Transportation, U.S. Senate. Washington, D.C : GAO, 2003.

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Office, General Accounting. Telecommunications : The changing status of competition to cable television : report to the Subcommittee on Antitrust, Business Rights, and Competition, Committee on the Judiciary, U.S. Senate. Washington, D.C. (P.O. Box 37050, Washington, D.C. 20013) : The Office, 1999.

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Chapitres de livres sur le sujet "Long Cable"

1

Samset, Ivar. « Lines in Long Span ». Dans Winch and cable systems, 117–65. Dordrecht : Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-017-3684-8_9.

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Feng, Yang, Dan Song et Minghui Li. « Fast Algorithm for Completion State Calculating of Wire Rope Cable Bridge ». Dans Lecture Notes in Civil Engineering, 525–31. Singapore : Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1260-3_48.

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AbstractWhen determining the completion state of the main cable of a cableway bridge, although the catenary theory can accurately consider the nonlinear mechanical effect of the cable, the iterative calculation is cumbersome and not convenient for engineering applications. Although the calculation based on the parabola theory is simple, the calculation accuracy for long cables is low. In this paper, based on catenary theory and considering the calculation accuracy and avoiding iterative calculation, a fast algorithm for the completion state of the main cable of the wire rope cableway bridge is proposed. The results show that the bridge state can be quickly and accurately determined by approximating the horizontal component of the cable tension and avoiding multiple iterative calculations. The proposed algorithm can be used in engineering design and construction.
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Saga, Nobuhiro, Jun Fujikami, Kazuya Ohmatsu, Toshikazu Shibata, Mitsuhiko Watanabe, Chizuru Suzawa, Shigeki Isojima et al. « Development of 50m-Long HTS Cable Conductor ». Dans Advances in Superconductivity IX, 1341–44. Tokyo : Springer Japan, 1997. http://dx.doi.org/10.1007/978-4-431-68473-2_161.

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Gabra, J. H., et A. K. Desai. « Cable Supported Bridges for Long to Superlong Spans ». Dans Lecture Notes in Civil Engineering, 255–61. Singapore : Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-8496-8_33.

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Wang, Xin, et Zhishen Wu. « Effectiveness of Smart Dampers for Hybrid FRP Cable in Long-Span Cable-Stayed Bridge ». Dans Advances in FRP Composites in Civil Engineering, 243–47. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17487-2_51.

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Lu, Naiwei, Yafei Ma et Yang Liu. « Maximum Probabilistic Traffic Load Effects on Large Bridges Based on Long-term Traffic Monitoring Data ». Dans Reliability and Safety of Cable-Supported Bridges, 171–91. First edition. | Boca Raton : CRC Press, 2021. | Series : Resilience and sustainability : CRC Press, 2021. http://dx.doi.org/10.1201/9781003170594-9.

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Mi, Jianwei, Ximing Men, Xiaoli Fang et Libin Fan. « A Novel Method of Fault-Location in Long Power Cable ». Dans Lecture Notes in Electrical Engineering, 1419–29. Singapore : Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2875-5_112.

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Nussbaumer, A., J. Oliveira Pedro, C. A. Pereira Baptista et M. Duval. « Fatigue Damage Factor Calibration for Long-Span Cable-Stayed Bridge Decks ». Dans Structural Integrity, 369–76. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13980-3_47.

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Cao, Jinxin, Yaojun Ge et Yongxin Yang. « Structural Static Performance of Cable-Stayed Bridges with Super Long Spans ». Dans Computational Structural Engineering, 461–68. Dordrecht : Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2822-8_51.

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Joseph, Anju, K. V. Vineetha, Dhanesh G. Kurup et R. Mini. « A Neural Network Based Overvoltage Prediction System for Long Cable Issue ». Dans Advances in Intelligent Systems and Computing, 357–64. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30465-2_40.

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Actes de conférences sur le sujet "Long Cable"

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Shoghijavan, Mohammad, et Uwe Starossek. « Optimum Design of Long-Span Cable-Supported Bridges Using Robustness Index ». Dans 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.2019.1199.

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<p>The target of this study is to use a practical method for the optimization of cable distance in cable– supported bridges using the robustness index. The proposed optimization method minimizes the cost of the bridge construction and guarantees a certain level of robustness. The reserve-based robustness index, applied in this study, considers the redistribution of forces after the failure of structural elements. For finding the optimum distance of cables, a simplified bridge model is considered. Cable-loss scenarios are considered in the design process and the dynamic effect of cable rupture is taken into account. Then, the critical design load of the cables and the maximum bending moment acting on the girder after the cable failure are calculated and incorporated into the bridge design. The effect of other influential factors, such as the bending stiffness of the girder and the axial stiffness of the cables, on the optimum design of the system is also investigated.</p>
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Fifield, Leonard S., Robert Duckworth et Samuel W. Glass. « Long Term Operation Issues for Electrical Cable Systems in Nuclear Power Plants ». Dans 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60729.

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Nuclear power plants contain hundreds of kilometers of electrical cables including cables used for power, for instrumentation, and for control. It is essential that safety-related cable systems continue to perform following a design-basis event. Wholesale replacement of electrical cables in existing plants facing licensing period renewal may be both impractical and cost-prohibitive. It is therefore important to understand the long term aging of cable materials to have confidence that aged cables will perform when needed. It is equally important in support of cable aging management to develop methods to evaluate the health of installed cables and inform selective cable replacement decisions. The most common insulation materials for electrical cables in nuclear power plants are cross-linked polyethylene and ethylene-propylene rubber. The mechanical properties of these materials degrade over time in the presence of environmental stresses including heat, gamma irradiation, and moisture. Mechanical degradation of cable insulation beyond a certain threshold is unacceptable because it can lead to insulation cracking, exposure of energized conductors, arcing and burning or loss of the ability of the cable system to function during a design-basis accident. While thermal-, radiation-, and moisture-related degradation of polymer insulation materials has been extensively studied over the last few decades, questions remain regarding the long term performance of cable materials in nuclear plant-specific environments. Identified knowledge gaps include an understanding of the temperature-dependence of activation energies for thermal damage and an understanding of the synergistic effects of radiation and thermal stress on polymer degradation. Many of the outstanding questions in the aging behavior of cable materials relate to the necessity of predicting long-term field degradation using accelerated aging results from the laboratory. Materials degrade faster under more extreme conditions, but extension of behavior to long term degradation under more mild conditions, such as those experienced by most installed cables in nuclear power plants, is complicated by the fact that different degradation mechanisms may be involved in extreme and mild scenarios. The discrepancy in predicted results from short term, more extreme exposure and actual results from longer term, more mild exposures can be counter intuitive. For instance, due to the attenuation of oxidation penetration in material samples rapidly aged through exposure to high temperatures, the bulk of the samples may be artificially protected from thermal aging. In another example, simultaneous exposure of cable insulation material to heat and radiation may actually lead to less damage at higher temperatures than may be observed at lower temperatures. The Light Water Reactor Sustainability program of the United States (US) Department of Energy (DOE) Office of Nuclear Energy is funding research to increase the predictive understanding of electrical cable material aging and degradation in existing nuclear power plants in support of continued safe operation of plants beyond their initial license periods. This research includes the evaluation and development of methods to assess installed cable condition.
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Nakamura, Okawa, Niwa et Takizuka. « Long Cable Phy For Ieee1394 ». Dans 1998 International Conference on Consumer Electronics. IEEE, 1998. http://dx.doi.org/10.1109/icce.1998.678311.

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Ito, Tomohiro, Yasuhiko Azuma, Atsuhiko Shintani et Chihiro Nakagawa. « Study on the Seismic Response of Cable Tray Considering Sliding Motion of Cable ». Dans ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28121.

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In various industrial plants such as thermal power plants, nuclear power plants, and chemical plants, many cable trays are generally used to support cables for control signals. Cable trays are very long, and thus are supported from ceilings or walls by many supporting structures. When the cable trays are subjected to strong seismic excitations, the trays or the supporting structures vibrate with large amplitudes. In the worst cases, they can collapse, and plants can lose control of systems, which can lead to severe accidents. Therefore, it is very important to maintain the structural integrity of cable trays during seismic events including recent severe earthquakes such as the East Japan Earthquake in 2011. Cable trays are generally made of thin steel plates with sides folded in the vertical direction, and with cables simply placed on the tray. Thus, cables can slide when the inertia force on the cables exceeds the friction force between the tray and cables. The mass of the cables is relatively large compared to that of a tray, thus the natural frequency of the tray will change significantly due to the cable sliding motion. Consequently, seismic responses of cable tray will also depend on the sliding motion of cables. Therefore, cable trays are seen as highly nonlinear structural systems. In this study, seismic responses of cable trays are investigated analytically considering cable sliding motions. A cable tray is modeled by a two-degree-of-freedom system. Response acceleration, and the displacements of the tray and the cable are evaluated for both sinusoidal and seismic inputs by varying the cable mass or friction coefficient between the tray and cables. It is confirmed that the sliding motion of the cable has a very large influences on the seismic responses of the cable-tray system.
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« Damage Simulation of Cable of Long-span Concrete Cable- stayed Bridge ». Dans 2018 3rd International Conference on Computer Science and Information Engineering. Clausius Scientific Press, 2018. http://dx.doi.org/10.23977/iccsie.2018.1029.

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Ahmed, Samih, Guayente Minchot, Anders Eriksson, Fritz King et Mikael Hällgren. « Post-Tensioned Stress Ribbon Systems in Long Span Roofs ». Dans IABSE Congress, New York, New York 2019 : The Evolving Metropolis. Zurich, Switzerland : International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.0533.

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<p>Cable systems have numerous advantages, such as: large column-free areas, and reduced materials consumption, which reduces the load and the cost. Nevertheless, they are rarely used in long span roofs due to large deflections, and the insufficient space for end supports, or/and back-stayed cables. This work suggests the use of post-tension stress ribbon system in long span roofs in order to reduce the pull-out forces, deflections and concrete stresses compared to a conventional cable system. A comparison is carried out through meticulous and accurate finite element simulations, using SAP2000, implemented for the new +200m roof of Västerås Travel Center (Sweden), which will become one of the longest cable suspended roofs in the world, if not the longest. Results confirm the suitability and superiority of stress ribbon systems as it reduces concrete stresses, deflections, pull-out forces and vertical reactions. These reductions are found highly correlated to the applied prestressing forces.</p>
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Hwang, Eui-seung, Sun-Kon Kim, Do-Young Kim et Ki-Jung Park. « Vibration Serviceability of Long Span Cable Bridges using Long-term Monitoring Data ». Dans IABSE Congress, New York, New York 2019 : The Evolving Metropolis. Zurich, Switzerland : International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.1539.

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<p>Along with building slender and longer span structures, vibration serviceability becomes more important considerations in bridge design and maintenance. In this study, vibration serviceability and deflection limit for long span cable bridges are investigated using long-term monitoring data such as accelerations and displacements of bridges. Exampled bridges are Yi Sun-Sin Grand Bridge (suspension bridge, main span length=1,545m) and 2<sup>nd</sup> Jindo Grand Bridge (cable stayed bridge, main span length=344m). Long-term data are analyzed and compared with various design codes, guidelines, and other research results. Probability of exceedance are calculated for each criterion. Regarding on deflection limits, Korean Bridge Design Code (Limit State Design) specifies L/400 and L/350 for cable stayed and suspension bridges, respectively. Saadeghvaziri suggested deflection limit based on natural frequency, acceleration limit of 0.5 m/s² and vehicle speed. Various human comfort criteria on vibration are also applied including ISO standards. The results of this study are expected to be useful reference for the design, the proper planning and deflection review of the long span cable bridges around the world. Further researches are required to find the optimum deflection or vibration criteria for long span bridge and their effects on bridge clearance and elevation.</p>
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Gatta, F. M., et S. Lauria. « Very long EHV cables and mixed overhead-cable lines. Steady-state operation ». Dans 2005 IEEE Russia Power Tech. IEEE, 2005. http://dx.doi.org/10.1109/ptc.2005.4524476.

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Lanz, Ben, et Wayne J. Chatterton. « How Cables Fail-the Myths and Fundamentals to Ensuring Long Cable Life ». Dans 2018 IEEE Electrical Insulation Conference (EIC). IEEE, 2018. http://dx.doi.org/10.1109/eic.2018.8481113.

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Freidah, J. T., R. E. Wagoner, T. J. Cash et N. H. Safar. « Long-Lead Cable Effects On Interferometric Sensors ». Dans O-E/Fibers '87, sous la direction de Ramon P. DePaula et Eric Udd. SPIE, 1988. http://dx.doi.org/10.1117/12.942536.

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Rapports d'organisations sur le sujet "Long Cable"

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Maguire, James, et Joseph McNamara. Holbrook Substation Superconductor Cable System, Long Island, New York Final Report. Office of Scientific and Technical Information (OSTI), juin 2010. http://dx.doi.org/10.2172/1046827.

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Schmidt, Frank, Fabien Durand et James Maguire. HTS Transmission Cable System for installation in the Long Island Power Grid. Office of Scientific and Technical Information (OSTI), octobre 2015. http://dx.doi.org/10.2172/1342768.

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Pastouret, Alan, Frans Gooijer, Bob Overton, Jan Jonker, Jim Curley, Walter Constantine et Kendall Miller Waterman. Complete Fiber/Copper Cable Solution for Long-Term Temperature and Pressure Measurement in Supercritical Reservoirs and EGS Wells. Office of Scientific and Technical Information (OSTI), novembre 2015. http://dx.doi.org/10.2172/1225845.

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Iyer, Ananth V., Samuel Labi, Steven Dunlop, Thomas Brady Jr. et Eki Amijaya. Cost and Benefit Analysis of Installing Fiber Optics on INDOT Projects. Purdue University, 2020. http://dx.doi.org/10.5703/1288284317131.

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The Indiana Department of Transportation (INDOT) is tasked with the stewardship of billions of dollars’ worth of public invested highway infrastructure. Not only does INDOT continually seek design and operational policies that foster cost effective project delivery and procurement, they also seek opportunities for revenue generation. Due to population growth and the increased demand for online connectivity and global information transmission, the fiber-optic cable industry has experienced rapid growth over the past few years. Information and communication technology (ICT) companies have long sought to achieve higher economic productivity by installing fiber-optic cables in the right of way (ROW) of access-controlled highways. Based on these developments, an experiment was conducted to measure the economic impact in Indiana. To determine this impact, a database was developed by compartmentalizing the analysis into (1) GDP per county per industry type, (2) the natural growth of GDP as a factor, and (3) the extent of contribution of broadband in the growth of GDP. A general formula was developed to incorporate the adjusted median income on both the industry and county levels, along with a broadband contribution factor. This formula was employed to determine policies that can produce optimum economic outcome by leveraging the Pareto method.
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Wang, S. L., et P. Santiago. On stiffening cables of a long reach manipulator. Office of Scientific and Technical Information (OSTI), février 1996. http://dx.doi.org/10.2172/184254.

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Carlin, F., M. Attal et G. Gaussens. Study on long-term irradiation aging of electrical cables (The VEILLE program). Office of Scientific and Technical Information (OSTI), avril 1995. http://dx.doi.org/10.2172/93880.

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Nelson, C. F., G. Gauthier et F. Carlin. Long-term aging and loss-of-coolant accident (LOCA) testing of electrical cables. Office of Scientific and Technical Information (OSTI), octobre 1996. http://dx.doi.org/10.2172/385579.

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Wang, S. L. Control of a long reach manipulator with suspension cables for waste storage tank remediation. Final report. Office of Scientific and Technical Information (OSTI), décembre 1994. http://dx.doi.org/10.2172/179213.

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McElroy, Marguerite K., James B. Edson, Wade R. McGillis, Thomas Austin et Michael J. Purcell. System Architecture and Operational Issues of Ocean Observatories as Exemplified by the Martha's Vineyard Coastal Observatory, A Cabled Platform for Long-Term Studies. Fort Belvoir, VA : Defense Technical Information Center, janvier 2002. http://dx.doi.org/10.21236/ada414978.

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