Volume 22 Issue 6
Dec.  2022
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WU Qing-xiong, HUANG Wan-kun, WANG Qu, CHEN Kang-ming, CHEN Bao-chun. Mechanical performance and design calculation method of prefabricated voided slab bridge with transverse post-tensioning[J]. Journal of Traffic and Transportation Engineering, 2022, 22(6): 130-142. doi: 10.19818/j.cnki.1671-1637.2022.06.008
Citation: WU Qing-xiong, HUANG Wan-kun, WANG Qu, CHEN Kang-ming, CHEN Bao-chun. Mechanical performance and design calculation method of prefabricated voided slab bridge with transverse post-tensioning[J]. Journal of Traffic and Transportation Engineering, 2022, 22(6): 130-142. doi: 10.19818/j.cnki.1671-1637.2022.06.008
shu

Mechanical performance and design calculation method of prefabricated voided slab bridge with transverse post-tensioning

doi: 10.19818/j.cnki.1671-1637.2022.06.008
  • 1.

    College of Civil Engineering, Fuzhou University, Fuzhou 350116, Fujian, China

  • 2.

    Fujian Provincial Key Laboratory on Multi-Disasters Prevention and Mitigation in Civil Engineering, Fuzhou University, Fuzhou 350116, Fujian, China

  • 3.

    Key Laboratory of Fujian Universities for Engineering Structures, Fuzhou University, Fuzhou 350116, Fujian, China

Funds:

National Key Research and Development Program of China 2017YFE0130300

National Natural Science Foundation of China 51808126

National Natural Science Foundation of China 52078137

Natural Science Foundation of Fujian Province 2019J06009

More Information
  • Author Bio:

    WU Qing-xiong (1973–), male, born in Nanjing, Fujian Province, researcher at Fuzhou University, PhD in engineering. He is engaged in research on bridge engineering. E-mail: wuqingx@fzu.edu.cn

    HUANG Wan-kun (1982–), male, born in Lujiang, Anhui Province, experimentalist of Fuzhou University, PhD in engineering. E-mail: huangwankun@fzu.edu.cn

  • Received Date: 2022-06-19
  • Publish Date: 2022-12-25
    Abstract
  • In order to improve the crack load and failure load of the hinge joint junction surface and solve the problem of the transverse force of the voided slab bridge, the mechanical performance of the prefabricated voided slab bridge with transverse post-tensioning (TPT)was studied. The mechanical mechanism of the hinge joint junction surface was analyzed by a local model test. The full-scale model test was adopted to research the overall mechanical performance of the voided slab bridge. Based on the mechanical mechanism of the hinge joint junction surface, the upper and lower limits of TPT were determined, and the design calculation formula of TPT was put forward. Test results show that the normal and tangential bonding strengths of the junction surface with TPT are 1.40-1.45 and 0.50-0.62 MPa, respectively, which are 8.1%-12.5% and 12.4%-38.3% higher than those without TPT, respectively. Moreover, increasing TPT can improve the normal and tangential bonding strengths of the junction surface. The failure mode of the full-scale test model of the voided slab bridge with TPT is the cracking failure of the voided slab, and no hinge joint cracking occurs during the test. The application of TPT can improve the transverse connection among slabs, avoid the loss of the transverse load transmitting ability due to the hinge joint junction surface damage and the failure of the structure, and increase the ultimate load of the voided slab bridge. The proposed formula for TPT design can effectively calculate the design value of TPT of the voided slab bridge.

     

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