[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]

Copy

Experimental study on mechanical propertiesof dowel bar embedded in concrete under fatigue loads()

Share：

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

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

Keywords:

dowel action;  fatigue loads;  fatigue failure mode;  fatigue life;  attenuation character

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.

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.

Common functions