ENG  Vol.5 No.11 , November 2013
Computation of the Strand Resistance Using the Core Wire Strain Measurement
Abstract

This paper proposes a method enabling to compute the prestressing strand resistance using the strain measured on only one core wire. Numerical analysis is conducted considering the pitch length of the strand and the diameters of the core wire and helical wires as parameters. The results verify that the relation between the stresses of the core wire and helical wires can be expressed in terms of the helical angle. Based on this observation, a formula computing directly the prestress force in the strand from the strain measured in the core wire is suggested. Owing to the recently developed measurement method for the core wire strain, the proposed formula can be exploited to determine the prestress of the strand.


Cite this paper
K. Cho, S. Kim, S. Park and Y. Park, "Computation of the Strand Resistance Using the Core Wire Strain Measurement," Engineering, Vol. 5 No. 11, 2013, pp. 850-855. doi: 10.4236/eng.2013.511103.
References

[1]   F. Lanza di Scalea, P. Rizzo and F. Seible, “Stress Measurement and Defect Detection in Steel Strands by Guided Stress Waves,” Journal of Materials in Civil Engineering, Vol. 15, No. 3, 2003, pp. 219-227.
http://dx.doi.org/10.1061/(ASCE)0899-1561(2003)15:3(219)

[2]   H.-L. (Roger) Chen and K. Wissawapaisal, “Application of Wigner-Ville Transform to Evaluate Tensile Forces in Seven-Wire Prestressing Strands,” Journal of Engineering Mechanics, Vol. 128, No. 11, 2002, pp. 1206-1214.
http://dx.doi.org/10.1061/(ASCE)0733-9399(2002)128:11(1206)

[3]   G. Wang, M. L. Wang, Y. Zhao, Y. Chen and B. Sun, “Application of EM Stress Sensors in Large Steel Cables,” Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, 2005, pp. 395-406.

[4]   J. Gao, B. Shi, W. Zhang and H. Zhu, “Monitoring the Stress of the Post-Tensioning Cable Using Fiber Optic Distributed Strain Sensor,” Measurement, Vol. 39, No. 5, 2006, pp. 420-428.
http://dx.doi.org/10.1016/j.measurement.2005.12.002

[5]   J.-M. Kim, H.-W. Kim, Y.-H. Park, I.-H. Yang and Y.-S. Kim, “FBG Sensors Encapsulated into 7-Wire Steel Strand for Tension Monitoring of a Prestressing Tendon,” Advances in Structural Engineering, Vol. 15, No. 6, 2012, pp. 907-918.

[6]   G. A. Costello, Theory of Wire Rope,” 2nd Edition, Springer, New York, 1997, p. 122.
http://dx.doi.org/10.1007/978-1-4612-1970-5

[7]   S. A. Velinsky, G. L. Anderson and G. A. Costello, “Wire Rope with Complex Cross Sections,” Journal of Engineering Mechanics, Vol. 110, No. 3, 1984, pp. 380-391.
http://dx.doi.org/10.1061/(ASCE)0733-9399(1984)110:3(380)

[8]   C. Erdonmez and C. Erdem Imrak, “Modeling and Numerical Analysis of the Wire Strand,” Journal of Naval Science and Engineering, Vol. 5, No. 1, 2009, pp. 30-38.

[9]   G. Shibu, K. V. Mohankumar and S. Devendiran, “Analysis of a Three Layered Straight Wire Rope Strand Using Finite Element Method,” Proceedings of the World Congress on Engineering 2011, 2011, Vol. 3.

[10]   I. Gerdemeli, S. Kurt and A. S. Anil, “Analysis with Finite Element Method of Wire Rope,” Vol. 78, No. 1, 2013.
http://mech-ing.com/journal/Archive/2012/11/185_Kurt.pdf

[11]   Korean Standards, “Uncoated Stress-Relieved Steel Wires and Strands for Prestressed Concrete,” KSD 7002, 2011.

[12]   W. G. Jiang and J. L. Henshall, “The Analysis of Termination Effects in Wire Strand Using the Finite Element Method,” The Journal of Strain Analysis for Engineering Design, Vol. 34, No. 1, 1999, pp. 31-38.
http://dx.doi.org/10.1243/0309324991513605

 
 
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