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Volume 56 Issue 1
Jan.  2021
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Journal of Southwest Jiaotong University  > 2021  >  56(1): 28-36.
SHAO Changjiang, QI Qiming, WEI Wang, HU Chenxu. Comparative Analysis of Shear Strength Models in Plastic Hinge Region for Concrete Hollow Piers[J]. Journal of Southwest Jiaotong University, 2021, 56(1): 28-36. doi: 10.3969/j.issn.0258-2724.20190196
Citation: SHAO Changjiang, QI Qiming, WEI Wang, HU Chenxu. Comparative Analysis of Shear Strength Models in Plastic Hinge Region for Concrete Hollow Piers[J]. Journal of Southwest Jiaotong University, 2021, 56(1): 28-36. doi: 10.3969/j.issn.0258-2724.20190196
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Comparative Analysis of Shear Strength Models in Plastic Hinge Region for Concrete Hollow Piers

doi: 10.3969/j.issn.0258-2724.20190196
  • Received Date: 18 Mar 2019
  • Rev Recd Date: 11 Oct 2019
    • Available Online: 23 Oct 2019
  • Publish Date: 01 Feb 2021
    Abstract
  • Accurate evaluation of shear strength in plastic hinge region is of great significance for seismic design of long-span bridges with tall piers. However, the shear design models for hollow piers are not directly listed in the current codes in China and abroad. The applicability of both the existing formulas for solid piers in the codes and the formulas for solid or hollow columns in literature needs to be further studied. Thus, based on the test results of 25 hollow piers with shear or flexural-shear failure modes, the influencing factors of shear strength in plastic region are analyzed, and the experimental values of shear strength are compared with the calculation results of 15 formulas. The results show that the shear strength of concrete hollow piers increases with an increase in concrete strength, stirrup ratio and axial load ratio, and decreases with an increase in displacement ductility factor and aspect ratio within a certain range, while the influence of the longitudinal reinforcement ratio is not significant. The errors between the test results and the calculated values by formulas of Aschheim, Caltrans, Sezen and Shin are all less than 5%, among which the Sezen model is the most suitable to assess the shear strength in plastic hinge region for hollow piers. The formulas in NZS3101, JRA, JTG/TB 02-01—2008, Eurocode 8, and ACI-318 lead to slightly conservative results, which can be used for shear design of hollow piers; the rest of equations, for overestimation of the shear strength in plastic hinge region, are inappropriate to concrete hollow piers.

     

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