Experimental Study on Strain Performance of Tensile Reinforcement under Fatigue Loads

Abstract:

As for the study on the strain performance of tensile reinforcement under the fatigue loads with amplitude of certain values, two groups of reinforced concrete slab bridge specimen were made. The fatigue test was carried out on one group of specimen, and the corresponding static load test was carried out on another group of specimen, the experimental study on the strain performance of tensile reinforcement was carried on bottom of the mid span of slabs. The results of the study shown that, under the fatigue loads at a certain amplitude, the strain performance of the tensile reinforcement tend to be stable with the increase of number of fatigue cycle, the strain value showed certain linear relationship with static load applied. When the fatigue amplitude increased, the change rule of strain with static load value applied was approximately linear, but the strain value increased more than the fatigue amplitude less under the same static load. It could be seen through the comparison of load - strain curve of the static load specimen, after effect of compressive fatigue with certain amplitude, the strain change with load applied was close to linear change, which has great relationship with the effect on concrete and reinforcement plastic deformation by fatigue load. The test results had the vital significance of further research on reinforcement performance under the action of fatigue loads.

• Periodical: Applied Mechanics and Materials (Volumes 351-352)
• Pages: 1625-1628
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.351-352.1625
• Online since: August 2013
• Authors: Xian Xi Tang*, Jin Bao Liang, Yan Peng Zhu, Xian Zhou Tang, Yue Xu
• Keywords: Experimental Study, Fatigue Loads, Reinforcement, Strain Performance, Tensile Zone

References

[1] Xingxin Li, Zhengxing Wang, Weixin Ren. Time-Dependent Reliability Assessment of Reinforced Concrete Bridge under Fatigue Loadings[J]. CHINA RAILWAY SCIENCE, 2009, 30(2)：49-53 (In Chinese).

[2] Xuhong Zhou, Xinyuan Lin, Donglian Tan, et al. Fatigue Test of Composite Box Beams with Corrugated Steel Webs[J]. China Journal of Highway and Transport, 2010, 23(4): 33-38, 69 (In Chinese).

[3] Juanxiu Zhang, Jianshu Ye, Weifa Yao, Fatigue behavior of RC beams strengthened with CFRP sheets after freeze-thaw cycling action[J]. JOURNAL OF SOUTHEAST UN IVERSITY (Natural Science Edition), 2010, 40(5): 1034-1038 (In Chinese).

[4] Ronggui Liu, Yiduo Zhang, Yu Chen, et al. Liu Tao1Fatigue damage model of prestressed concrete beams suffered freeze-thawing[J]. JOURNAL OF JIANGSU UNIVERSITY(Natural Science Edition), 2012, 33(1): 115-119 (In Chinese).

[5] Tieming Hu, Chengkui Huang, Xiaofeng Chen, et al. Fatigue Experiment of Concrete Bridges Strengthened by Simple-supporting to Continuous Construction Method[J]. China Journal of Highway and Transport, 2010, 23(5): 76-83 (In Chinese).

[6] Feng Shang, Shiqin He, Xiaohui An. Shear fatigue of corroded reinforced concrete beams[J]. Journal of Tsinghua University(Science and Technology), 2010, 50(9): 1361-1364 (In Chinese).

[7] Lixin Liu, Xiaolin Wang, Qiubo Yu, et al. Study on Deflection of Partially Prestressed Concrete Beams Under Fatigue Loading[J]. Journal of Zhengzhou University (Engineering Science), 2007, 28(4): 4-7 (In Chinese).

[8] Leibin Zuo. Research on Fatigue Behavior of Bi-prestressed Concrete Beam[D]. Tianjin: Tianjin University, 2008 (In Chinese).

[9] Weijian Yi, Xiaodong Sun. Experimental investigation on the fatigue behavior of corroded RC beams[J]. CHINA CIVIL ENGINEERING JOURNAL, 2007, 40(3): 6-10 (In Chinese).

[10] Haifeng Ru, Qian Zhang, Chunxiang Liang. Experimental Research on the Fatigue Rigidity of RC Beams Reinforced by CFRP Sheets[J]. JOURNAL OF RAILWAY ENGINEERING SOCIET, 2008, (6): 52-55 (In Chinese).