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XU Bo, LIU Yong-jian, ZHU Wei-qing, JIANG Lei. Simplified method of calculating flexural capacity of steel-concrete composite beam after stud corrosion[J]. Journal of Traffic and Transportation Engineering, 2019, 19(2): 25-35. doi: 10.19818/j.cnki.1671-1637.2019.02.003
Citation: XU Bo, LIU Yong-jian, ZHU Wei-qing, JIANG Lei. Simplified method of calculating flexural capacity of steel-concrete composite beam after stud corrosion[J]. Journal of Traffic and Transportation Engineering, 2019, 19(2): 25-35. doi: 10.19818/j.cnki.1671-1637.2019.02.003
shu

Simplified method of calculating flexural capacity of steel-concrete composite beam after stud corrosion

doi: 10.19818/j.cnki.1671-1637.2019.02.003
  • 1.

    School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China

  • 2.

    Department of Civil Engineering, Ordos Institute of Technology, Ordos 017000, Inner Mongolia, China

More Information
  • Author Bio:

    XU Bo (1985-), male, doctoral student, xubo 152723@126.com

    LIU Yong-jian (1966-), male, professor, PhD, lyj.chd@gmail.com

  • Received Date: 2018-10-19
  • Publish Date: 2019-04-25
    Abstract
  • In order to forecast the flexural capacity of steel-concrete composite beam after the interface stud corrosion, the deterioration effects of the reductions of stud shear strength, bonding strength with concrete and stud effective area on the stud shear capacity after corrosion were mainly considered, and the concept and calculation formula of shear connection degree of composite beam and the stud shear capacity coefficient after stud corrosion were proposed. Based on the plasticity simplified calculation assumption, the calculation models of flexural capacity of positive and negative moment regions for the composite beam after stud corrosion were established by adopting the shear connection degree of composite beam after stud corrosion to reduce the composite beam flexural capacity. The test results of 23 composite beams were analyzed, and the validity of the model was verified. Test result shows that when the corrosion rate of stud is less than 10%, the test values of flexural capacity of positive and negative moment regions of the test beam are very close to the theoretical value calculated by the proposed formula. The mean ratio between the test value and the calculated value in the positive moment region is 1.00, and the variation coefficient is 0.04. Their mean ratio in the negative moment region is 1.01, and the variation coefficient is 0. It can be seen that the formula calculation results are in good agreement with the test results, and the simplified calculation method can be used for the quantitative and qualitative analysis on the flexural capacity of steel-concrete composite beams when the corrosion rate of interface stud is small.

     

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