摘要To study the fatigue prestress loss of prestressed concrete beams, four bonded post-tensioned bonded concrete simple supported beams were designed and constructed for constant-amplitude fatigue load displacement tests. Strain sensors were embedded into the pre-pressed zone of the mid-span of the simply supported concrete test beams, and the fatigue prestress losses were calculated by strain increments in the concrete. The experimental results show that the phenomenon of fatigue prestress loss was present and primarily occurred in the forepart of cyclic fatigue test, and appeared to fit an exponential function law regarding cyclic fatigue load under dynamic loading for prestressed concrete beams. The preliminary results may be useful as a reference to improve the theory for designing prestressd concrete bridges.
Abstract：To study the fatigue prestress loss of prestressed concrete beams, four bonded post-tensioned bonded concrete simple supported beams were designed and constructed for constant-amplitude fatigue load displacement tests. Strain sensors were embedded into the pre-pressed zone of the mid-span of the simply supported concrete test beams, and the fatigue prestress losses were calculated by strain increments in the concrete. The experimental results show that the phenomenon of fatigue prestress loss was present and primarily occurred in the forepart of cyclic fatigue test, and appeared to fit an exponential function law regarding cyclic fatigue load under dynamic loading for prestressed concrete beams. The preliminary results may be useful as a reference to improve the theory for designing prestressd concrete bridges.
曾丁, 王国亮, 谢峻, 郑晓华. 预应力混凝土梁疲劳预应力损失探索性试验研究[J]. Journal of Highway and Transportation Research and Development, 2014, 8(2): 37-41.
ZENG Ding, WANG Guo-liang, XIE Jun, ZHENG Xiao-hua. Exploratory Experimental Study on Fatigue Prestress Loss of Prestressed Concrete Beams. Journal of Highway and Transportation Research and Development, 2014, 8(2): 37-41.
[1] WANG Xin-ling, DUAN Hong-wei,LU Zhen-ya. The Experimental Research on Fatigue Performance of Prestressed Concrete Girder with HRHF500 Steel Bar for High Speed Railway[J]. Industrial Construction, 2010, 40(11):22-26. (in Chinese)
[2] HUA Jian-min,ZOU Xiao-bo, WANG Jian-yue, et al. Experimental Analysis of Bending Fatigue Behavior of Prestressed Concrete Girders with Complex Box-type Section Used in High-speed Railway[J]. Journal of Civil Architectural & Environmental Engineering, 2011, 33(3):8-12. (in Chinese)
[3] WANG Xiao-lin,LIU Li-xin. Fatigue Behavior of Pretensioned Prestressed Concrete Beams with Inclined Strands[J]. Huazhong Univ. of Sci. & Technolgy:Science Edition, 2010, 38(5):113-116. (in Chinese)
[4] LU Hai-yan, DAI Gong-lian, LI De-jian. Deflection of Prestressed Concrete Beam under Fatigue Load[J]. Journal of Changsha Railway University, 1998, 16(1):24-28. (in Chinese)
[5] ZHANG Jian-lin, SONG Yu-pu, QU Xiu-hua. Experimental Research on Constant-amplitude Fatigue Behavior of Retard-bonded Partially Prestressed Concrete Beams. Journal of Dalian University of Technology, 2008, 48(1):112-117. (in Chinese)
[6] LUO Xiao-yong, CHEN Yue-ke, DENG Peng-qi. Experimental Study on Fatigue Properties of Unbounded Partially Prestressed. Concrete (UPC) beams[J]. Journal of Building Structures, 2007, 28(3):98-104. (in Chinese)
[7] XUE Wei-chen,QIAN Wei,TAN Yuan. Studies on Fatigue Guidelines for Concrete Beams Partially Prestressed with CFRP Tendons[J]. Journal of Tongji University:Natural Science Edition, 2008, 36(7):874-879. (in Chinese)
[8] KUMAR V SANJEEV, GANGARAO V R H. Fatigue Response of Concrete Decks Reinforced with FRP Rebars[J]. Journal of Structural Engineering,1998, 124(1):11-18.
[9] NABILl G F. Response of Continuous CFRP Prestressed Concrete Bridge under Static and Repeated Loading[J]. PCI Journal, 2000, 45(6):84-89.
[10] ZHOU An,DAI Hang,LIU Qi-wei. Static and Fatigue Experimental Study on Crack width of Interior Prestressed Composite Beams[J]. Journal of Highway and Transportation Research and Development, 2007, 24(10):81-8. (in Chinese)
[11] LIU Chao,XU Dong,WU Zhen-rong. Evaluation of the Fatigue Behavior of External Prestressing Tendon Systems[J]. China Civil Engineering Journal, 2009, 42(3):87-92. (in Chinese)
[12] LIU Rong-gui,LIU Tao,ZHOU Wei-ling, et al. Freeze-thaw Cycle Test and Damage Mechanics Model of PC Members after Fatigue Loads[J]. Journal of Nanjing University of Technology:Natural Science Edition, 2011, 33(3):22-27. (in Chinese)
[13] ZHENG Yi,XIANG Yang-kai,ZHOU Zhi-xiang,et al. The Method on Estimating Fatigue Surplus Life of Transversely Tensioned Prestressed Concrete in The Loading of Mutil-leveling Changing Scope[J]. Journal of Chongqing Jiaotong University, 2005, 24(6):51-53. (in Chinese)
[14] LUO Xu-guo,DAI Gong-lian. Study on Computational Method of Fatigue Damages of Unbonded Prestressed High Performance Fly Ash Concrete Bridges[J]. Journal of the China Railway Society, 2009, 31(6):76-82. (in Chinese)
[15] FENG Xiu-feng,SONG Yu-pu,SONG Yuan-cheng. Full-range Nonlinear Analysis of Fatigue Damage in Prestressed Concrete Flexural Members[J]. Journal of Dalian University of Technology, 2005, 45(3):410-415. (in Chinese)
[16] NAAMAN A E, FOUNAS M. Partially Prestressed Beams under Random-amplitude Fatigue Loading[J]. Journal of Structural Engineering, 1991,117(12):3742-3761.
[17] FENG Xiu-feng, SONG Yu-pu, ZHU Mei-chun. An Experimental Study on the Fatigue Life of Prestressed Concrete Beams under Random-amplitude Fatigue Loading. China Civil Engneering Journal, 2006, 39(9):32-38. (in Chinese)
[18] ZHANG Ji-wen,ZENG Jun-cheng,ZHANG Zhen-xing,et al. Experimental Study on Behavior of Pre-stressed Concrete under Flexural Tension-compression Fatigue Loading[J]. Industrial Construction, 2009, 39(8):72-75. (in Chinese)
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2014, Vol. 8 
