Behavior Evaluation for Reinforced Concrete Columns with Rectangular Hollow Section Subjected to Axial Compression and Biaxial Bending

Zigang Xu, Qiang Han, Chao Huang

Abstract


In order to evaluate the behavior of reinforced concrete columns with rectangular hollow section subjected to axial compression and biaxial bending, the calculation formula of load capacity and moment-curvature relationship are derived according to the distribution type of neutral axis in this paper. The load capacity and rotation ductility of the bottom control section of three reinforced concrete specimen bridge columns with rectangular hollow section under different axial compression ratio, reinforcement ratio and stirrup ratio are analyzed based on these calculation formulae. The MxMy interaction curves and moment-curvature curves of bridge column specimens derived from the theoretical calculation show good agreement with the experimental data obtained by cyclic testing of three specimens under axial compression and biaxial bending. The results show that the PMxMy interaction has considerable effects on the behavior of the reinforced concrete bridge columns with rectangular hollow section. If these interaction effects are ignored, then the load capacity and deformation are overestimated and this fact can be crucial from the viewpoint of design.


Keywords:

biaxial bending; bridge column; deformation; load capacity; rectangular hollow section.

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References


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DOI: 10.3846/bjrbe.2016.06

Cited-By

1. Nonlinear seismic response of a base isolated single pylon cable-stayed bridge
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Engineering Structures  vol: 175  first page: 806  year: 2018  
doi: 10.1016/j.engstruct.2018.08.077

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