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Plastic hinge length of circular reinforced concrete columns
Yu-Chen Ou,Raditya Andy Kurniawan,Dimas Pramudya Kurniawan,Nguyen Dang Nguyen 사단법인 한국계산역학회 2012 Computers and Concrete, An International Journal Vol.10 No.6
This paper presents a parametric study of the plastic hinge length of circular reinforced concrete columns using a three-dimensional finite element analysis method, and using the Taguchi robust design method to reduce computational cost. Parameters examined include the longitudinal reinforcing ratio, the shear span-to-depth ratio, the axial force ratio and the concrete compressive strength. The study considers longitudinal reinforcement with yield strengths of 414 MPa and 685 MPa, and proposes simplified formulas for the plastic hinge length of circular reinforced concrete columns, showing that increases in plastic hinge length correlate to increases in the axial load, longitudinal reinforcing and shear span-todepth ratios. As concrete strength increases, the plastic hinge length decreases for the 414 MPa case but increases for the 685 MPa case.