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Development and Performance Experiment of Iso-tensioning System using Electrical Resistance Loadcell
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 Title & Authors
Development and Performance Experiment of Iso-tensioning System using Electrical Resistance Loadcell
Park, Won-Tae; Chun, Kyoung-Sik;
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Because MS(Multi-Strand) cables consist of many strands, a jacking force is applied to each strand one by one for cable construction. All strands should have an equal tensile force when the last one is wedged. This is the core technology for MS iso-tensioning. In this study, a new MS cable iso-tensioning system was developed for controlling and jacking the high-strength strands, with an ultimate tensile strength of 2,200MPa, for a stay cable of extra-dosed/cable-stayed bridges. The newly developed iso-tensioning system consists of electrical resistance load cells, hydraulic jacking devices, hydraulic pumps, and integrated controllers. Moreover, it is embedded with an algorithm that can control and predict the variations in tensile forces of the Master and Slave strands in real time. Actual experiments were carried out to verify the function and performance of the newly developed system. This system was applied successfully to the stay cable construction of 2nd Tae-in extra-dosed bridge in Gwangyang.
Cable-Stayed;Electrical Resistance;Extra-Dosed;Iso-Tensioning;MS(Multi-Strand) Cable;
 Cited by
Jun J.T., Kim C.H., Kim H.B, Ahn D.G., "A Study on the Development of Iso-Tensioning System for Cable-Stayed Bridges using FBG Sensors", Korean Society of Civil Engineers(KSCE), Proceeding of the Annual Conference of the KSCE, 2010.

Kim H.K., Kim C.H., "Experimental Analysis on Equivalent Tensile Force of Multiple Strand Cable", Korea Institute for Structural Maintenance and Inspection(KISMI), Proceeding of the Spring Conference of the KISMI, 2013.

Ko Y.K, Kim C.H., Chun K.S., Chung K.S., "Application of High Strength Cable and MS Cable Tension System to 2nd Taein Bridge (Extra-Dosed)", Korean Institute of Bridge and Structural Engineers (KIBSE), Proceeding of the Annual Conference of the KIBSE, 2014.

Ko Y.K., Kim C.H., Choi S.C., Jung S.J., Seong T.R., Kim J.K., "Design and Construction of 2nd Taein Bridge(Extra-Dosed) using 2,200MPa MS(Multi-Strand) Stay Cable and 2,400MPa PT(Post-Tensioning) System", Computational Structural Engineering Institute of Korea, Technical Articles, Vol.27, No.3 pp.49-54, 2014.

Yang C.Y., "Principles of Loadcell", Monthly Magazine of Auto Control & Inspection, Special Articles, April, 2002.