Abstract—A new layout of prestress tendons named as “one-way tendons”, instead of traditional “U tendons”, was applied in the PC box pylon of a long span cable-stayed bridge. The length of these prestress tendons was only 5m-7m, the contribution of each prestress loss source was different from tendons with common length, which added the difficulty to construction control. This paper presents a full-scale segment model test to determine the prestress losses of these short tendons, especially focuses on instantaneous losses due to anchorage set and friction. Test result shows that the average losses is 26%, anchorage set leads to more than 50% of total losses, friction leads to 30% which should not be ignored as most articles and code recommend.

Cite: Nannan Cui, Xiaolin Yu, Buyu Jia, Jintu Zhong, and Quansheng Yan, "Experimental Study on Prestress Loss of Short Tendons Applied in the Cable-Stayed Bridge PC Pylon," International Journal of Structural and Civil Engineering Research, Vol. 4, No. 3, pp. 259-264, August 2015. doi: 10.18178/ijscer.4.3.259-264