Seismic Failure Modes and Deformation Capacity of Reinforced Concrete Columns under Cyclic Loads

  • Ma Ying School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou City, China
  • Gong Jin-xin State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian City, China

Abstract

This paper investigates the seismic failure modes and horizontal deformation capacity of reinforced concrete square columns based on the pseudo-static test. The controlled variables include shear aspect ratio, axial load ratio and stirrup spacing. The seismic failure modes, the inelastic deformation capacity after yielding and the deformation components due to flexure, shear and anchorage slip of the RC columns were analyzed, especially flexural-shear failure. The results show that decreasing shear aspect ratio, or increasing axial load or stirrup spacing can result in the change of column failure mode from flexural failure to flexural- shear failure or shear failure, the pinching of hysteresis loops, the reductions of hysteresis loop area and deformation capacity. With the increase of total displacement, all three displacement components increased; the contribution of flexure displacement in total displacement reduced, the contribution of shear displacement increased, the contribution of anchorage slip displacement changed in the range of 30%- 40%.

Keywords: reinforced concrete, rectangular column, cyclic loads, seismic failure modes, deformation capacity, displacement components
Published online
2017-06-15
How to Cite
Ying, M., & Jin-xin, G. (2018). Seismic Failure Modes and Deformation Capacity of Reinforced Concrete Columns under Cyclic Loads. Periodica Polytechnica Civil Engineering, 62(1), 80-91. https://doi.org/10.3311/PPci.9893
Section
Research Article