• 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 22 Issue 4
Aug.  2009
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Article Contents
ZHANG Jing, WANG Zhenling, QIAN Yongjiu. Experimental Research on Bearing Behavior of New-to-Old Concrete Interface in Arch Bridge Strengthening[J]. Journal of Southwest Jiaotong University, 2009, 22(4): 564-568.
Citation: ZHANG Jing, WANG Zhenling, QIAN Yongjiu. Experimental Research on Bearing Behavior of New-to-Old Concrete Interface in Arch Bridge Strengthening[J]. Journal of Southwest Jiaotong University, 2009, 22(4): 564-568.

Experimental Research on Bearing Behavior of New-to-Old Concrete Interface in Arch Bridge Strengthening

  • Received Date: 24 Sep 2008
  • Two models of arch ring were made to research the bearing behaviors of new-to-old concrete interface in arch bridge strengthening.Destructive experiments were carried out on the two models to investigate their failure characteristics and service behaviors and the distributions of stress and strain on new-to-old concrete interface.The experimental result shows that the shear-bearing capacity of the interface is given by the bond of new and old concrete without embedded steel bars at the early stage of loading.When shear stress increases to the bond shear strength of new and old concrete,the shear-bearing capacity of the interface is mainly given by embedded steel bars.The distribution of bond shear stress on the interface is different in different regions at the stage from yielding of longitudinal reinforcement to the failure of specimens.At the stage,the bond shear stress decreases linearly in the region near cradks,does not change in the region away from cracks and increases linearly in the region away far from cracks.

     

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