• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 29 Issue 4
Jul.  2016
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Article Contents
ZHU Bing, WANG Xuewei. Experimental Study on PBL Shear Connectors of Steel-Concrete Composite Bridge Considering Transverse Prestressing[J]. Journal of Southwest Jiaotong University, 2016, 29(4): 621-631. doi: 10.3969/j.issn.0258-2724.2016.04.004
Citation: ZHU Bing, WANG Xuewei. Experimental Study on PBL Shear Connectors of Steel-Concrete Composite Bridge Considering Transverse Prestressing[J]. Journal of Southwest Jiaotong University, 2016, 29(4): 621-631. doi: 10.3969/j.issn.0258-2724.2016.04.004

Experimental Study on PBL Shear Connectors of Steel-Concrete Composite Bridge Considering Transverse Prestressing

doi: 10.3969/j.issn.0258-2724.2016.04.004
  • Received Date: 21 Jan 2015
  • Publish Date: 25 Aug 2016
  • In order to study the shear capacity and its influencing factors of PBL shear connectors for steel-concrete composite girder bridges, 33 specimens in 13 groups of three types were designed for push-out tests conducted in Xiaoshagou Bridge in Lanzhou, China. The failure modes, failure mechanisms, and influencing factors of shear capacity of these PBL shear connectors were analyzed comparatively. On this basis, a shear capacity calculation formula for PBL shear connectors considering the transverse prestressing effect was proposed. The results show that the shear capacity of PBL shear connectors could be effectively increased by increase of transverse rebar diameter, perforated rib diameter, and perforated rib thickness. The existence of transverse pretension stress accelerated the cracking of concrete, causing the strength and stiffness of concrete, perforated plate, and reinforcing rebars unable to exert their effect fully. As a result, the shear capacity of PBL shear connectors were reduced by about 10%. In addition, the constraint effect of transverse stress improved the strength and stiffness of concrete and delayed the concrete cracking, bringing the strength and stiffness of concrete, perforated plate, and reinforcing rebars into full play, and resulting in an significant improvement (20%) in the shear capacity of PBL shear connectors. The calculated results from the proposed formula close to the test results verified its effectiveness.

     

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