1. School of Urban Construction, Wuhan University of Science and Technology, Wuhan Hubei 430070, China;
2. School of Civil Engineering, Central South University, Changsha Hunan 410075, China;
3. Colledge of Huaxia, Wuhan University of Technology, Wuhan Hubei 430223, China
Fatigue Behavior of Reinforced Concrete T-beam
ZHU Hong-bing1,2, XU Yong-qiang1, LI Xiu3, YU Zhi-wu2
1. School of Urban Construction, Wuhan University of Science and Technology, Wuhan Hubei 430070, China;
2. School of Civil Engineering, Central South University, Changsha Hunan 410075, China;
3. Colledge of Huaxia, Wuhan University of Technology, Wuhan Hubei 430223, China
摘要Equi-amplitude fatigue loading experiments on five reinforced concrete T-beams were conducted to observe the fatigue damage development. Three stages of fatigue damage were seen in the experiments. The damage rapidly developed early and late periods of the experiment but was relatively stable in between. The beam failed because of the brittle failure of the steel bars. The number of cracks, and the width and height also follow three stages: rapid development, stable development, and failure. The growth of almost all of the cracks stopped at the time of beam failure, except one or two main cracks that continued to grow. The deflection of the test beam and strain of the steel bars and concrete increased rapidly early in the fatigue cycles, with increasing fatigue cycles, whereas they were relatively stable in the middle stage but increased rapidly near the failure point. Finally, the S-N curve of the reinforced concrete T-beam was obtained.
Abstract：Equi-amplitude fatigue loading experiments on five reinforced concrete T-beams were conducted to observe the fatigue damage development. Three stages of fatigue damage were seen in the experiments. The damage rapidly developed early and late periods of the experiment but was relatively stable in between. The beam failed because of the brittle failure of the steel bars. The number of cracks, and the width and height also follow three stages: rapid development, stable development, and failure. The growth of almost all of the cracks stopped at the time of beam failure, except one or two main cracks that continued to grow. The deflection of the test beam and strain of the steel bars and concrete increased rapidly early in the fatigue cycles, with increasing fatigue cycles, whereas they were relatively stable in the middle stage but increased rapidly near the failure point. Finally, the S-N curve of the reinforced concrete T-beam was obtained.
基金资助:Supported by the National High-tech R&D Program of China (863 Program) (No.2009AA11Z101);the Road and Transport R&D Project for Western Regions of China Commissioned by the NOC (No.200631800019)
朱红兵, 许永强, 李秀, 余志武. 钢筋混凝土T梁疲劳性能试验研究[J]. Journal of Highway and Transportation Research and Development, 2014, 8(3): 46-51.
ZHU Hong-bing, XU Yong-qiang, LI Xiu, YU Zhi-wu. Fatigue Behavior of Reinforced Concrete T-beam. Journal of Highway and Transportation Research and Development, 2014, 8(3): 46-51.
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2014, Vol. 8 
