[1] Li Pengfei, An Xuehui, He Shiqin, Chen Chen, et al. Experimental study on mechanical propertiesof dowel bar embedded in concrete under fatigue loads [J]. Journal of Southeast University (English Edition), 2016, 32 (4): 445-450. [doi:10.3969/j.issn.1003-7985.2016.04.009]
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Experimental study on mechanical propertiesof dowel bar embedded in concrete under fatigue loads(
)
钢筋混凝土销栓作用的疲劳承载性能试验研究
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 32
- Issue:
- 2016 4
- Page:
- 445-450
- Research Field:
- Civil Engineering
- Publishing date:
- 2016-12-20
Info
- Title:
- Experimental study on mechanical propertiesof dowel bar embedded in concrete under fatigue loads
- 钢筋混凝土销栓作用的疲劳承载性能试验研究
- Author(s):
- Li Pengfei1; An Xuehui1; He Shiqin2; Chen Chen2
-
1State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
2School of Civil Engineering, North China University of Technology, Beijing 100144, China
- PACS:
- TU312
- DOI:
- 10.3969/j.issn.1003-7985.2016.04.009
- Abstract:
- To investigate the mechanical properties of a dowel action under fatigue loads, nine reinforced concrete specimens were fabricated, and the monotonic and fatigue loadings were performed on these specimens, respectively. All of these specimens were divided into two series. Six specimens in Series Ⅰ with different bar diameters of 12, 20 and 25 mm were subjected to monotonic loads and were used to confirm the ultimate bearing capacity. The remaining three specimens in Series Ⅱ were subjected to fatigue loads and were designed to investigate the attenuation character of dowel action and the fatigue failure modes. The test results show that the accumulated fatigue damage due to fatigue loads can reduce the ultimate bearing capacity of specimens. With the increase in fatigue loads, the failure mode can transform to fatigue rupture of the dowel bar under the serviceability loading state, i.e. 55% of the monotonic capacity. The fatigue life is determined by the fatigue properties of steel and concrete. Based on the test data, the failure process of dowel action can be divided into two stages: the accumulation of fatigue damage and the fatigue rupture of dowel bar.
- 为研究钢筋销栓作用的疲劳承载性能, 制作了9个钢筋混凝土试件分别进行静载试验和疲劳加载试验.试件共分为2组, 首先通过6个试件的静载试验确定销栓作用的极限承载力, 其钢筋直径分别为12, 20和25 mm;然后通过3个试件的疲劳加载试验来研究疲劳荷载作用下销栓作用承载性能的衰减特征及疲劳破坏形态.试验结果表明, 在疲劳加载的过程中, 疲劳损伤的积累会降低销栓作用的承载能力.在正常使用状态下, 即极限承载力的55%, 随着疲劳循环次数的增加, 销栓作用的破坏模式会发生转化.疲劳破坏形态表现为钢筋的瞬时断裂, 其疲劳寿命由钢筋和混凝土的材料性能所决定.基于试验结果, 可以将钢筋销栓作用的疲劳破坏过程分为2个阶段, 分别为损伤积累阶段和瞬时断裂阶段.
References:
[1] Chen Zikang, Zhou Yun, Zhang Jichao, et al. Retroversion and forecast of present research and application of precast concrete structure[J]. Earthquake Resistant Engineering and Retrofitting, 2012, 34(4): 1-11.(in Chinese)
[2] Song Guohua, Huo Da, Wang Dongwei, et al. Shear capacity of vertical-grooved connection in PBP structures[J]. China Civil Engineering Journal, 2003, 36(11): 61-64.(in Chinese)
[3] Huang Yuan, Xu Ming, Zhang Rui. Experimental study of the shear behavior of total precast concrete structures with steel cable connections[J]. Journal of Hunan University(Natural Sciences), 2014, 41(6): 22-27.(in Chinese)
[4] Li Yingmin, Yu Jing, Xia Hongliu. Experimental research on seismic behavior of frame columns with construction joint[J]. China Civil Engineering Journal, 2011(S1): 81-86.(in Chinese)[5] Li Luoke. Research on the load transfer failure mechanism for dowel bar in concrete pavement[D]. Harbin: School of Transportation Science and Engineering of Harbin Institute of Technology, 2012.(in Chinese)
[6] Tan Yiqiu, Li Luoke, Cao Peng, et al. Analysis of corrosion mechanism and deterioration process for dowel under de-icing salt environment[J]. Engineering Mechanics, 2013(12): 199-205.(in Chinese)
[7] Zhang Yinling. The behavior research of new-to-old concrete composite components[D]. Xi’an: Xi’an Technological University, 2015.(in Chinese)
[8] Austin S, Robins P, Pan Y. Tensile bond testing of concrete repairs[J]. Materials and Structures, 1995, 28(5): 249-259. DOI:10.1007/bf02473259.
[9] Soltani M, Maekawa K. Path-dependent mechanical model for deformed reinforcing bars at RC interface under coupled cyclic shear and pullout tension[J]. Engineering Structures, 2008, 30(4): 1079-1091. DOI:10.1016/j.engstruct.2007.06.013.
[10] Soroushian P, Obaseki K, Rojas M C. Bearing strength and stiffness of concrete under reinforcing bars[J]. ACI Materials Journal, 1987, 84(3): 179-184.
[11] Moradi A R, Soltani M, Tasnimi A A. A simplified constitutive model for dowel action across RC cracks[J]. Journal of Advanced Concrete Technology, 2012, 10(8): 264-277. DOI:10.3151/jact.10.264.
[12] Vintzeleou E N, Tassios T P. Behavior of dowels under cyclic deformations[J]. ACI Structural Journal, 1987, 84(1): 18-30.
[13] Mattock A H, Hawkins N M. Shear transfer in reinforced concrete-recent research[J]. Journal of PCI, 1972, 17(2): 55-75. DOI:10.15554/pcij.03011972.55.75.
[14] Dei Poli S, Di Prisco M, Gambarova P G. Shear response, deformations, and subgrade stiffness of a dowel bar embedded in concrete[J]. Structural Journal, 1992, 89(6): 665-675.
Memo
- Memo:
-
Biographies: Li Pengfei(1986—), male, graduate; An Xuehui(corresponding author), male, doctor, professor, anxue@tsinghua.edu.cn.
Foundation items: The Fund of the National Key Laboratory in China(No.2015-Ky-01), the National Key Technology R& D Program of China(No.2015BAB07B07).
Citation: Li Pengfei, An Xuehui, He Shiqin, et al. Experimental study on mechanical properties of dowel bar embedded in concrete under fatigue loads[J].Journal of Southeast University(English Edition), 2016, 32(4):445-450.DOI:10.3969/j.issn.1003-7985.2016.04.009.