Influence of reinforcement buckling on the seismic performance of reinforced concrete columns

Abstract The buckling of longitudinal reinforcing steel is one of the most important failure stages of reinforced concrete (RC) flexural specimens under seismic loading. To study the influential factors in longitudinal buckling, a simplified buckling model for columns with rectangular and circular cross sections has been developed based on stability theory. In this study, 6 rectangular and 5 circular RC columns with different reinforcement yield strengths and configurations were tested under constant axial and reverse horizontal loads. The simplified buckling model was verified, and the influence of reinforcement buckling on the seismic performance of RC columns was studied. The results indicate that the buckling model can provide a good estimate of the buckling length of the longitudinal bars. The length-to-diameter ratio ( L / D ) of the longitudinal bars is the key factor that influences the seismic performance of RC columns. The simplified buckling model can reflect the influential factors of bar buckling and can provide guidelines for the seismic design of RC columns.

[1]  R. Dhakal,et al.  Modeling for Postyield Buckling of Reinforcement , 2002 .

[2]  Stavroula J. Pantazopoulou,et al.  DETAILING FOR REINFORCEMENT STABILITY IN RC MEMBERS , 1998 .

[3]  Giorgio Monti,et al.  Nonlinear Cyclic Behavior of Reinforcing Bars Including Buckling , 1992 .

[4]  S. Pujol,et al.  Reconsidering the use of high-strength reinforcement in concrete columns , 2012 .

[5]  Andrea Prota,et al.  EXPERIMENTAL BEHAVIOUR AND NUMERICAL MODELLING OF SMOOTH STEEL BARS UNDER COMPRESSION , 2006 .

[6]  Bozidar Stojadinovic,et al.  Seismic behavior of slender reinforced concrete walls , 2014 .

[7]  Murat Saatcioglu,et al.  Circular High-Strength Concrete Columns under Simulated Seismic Loading , 1999 .

[8]  Mario E. Rodriguez,et al.  Cyclic Stress-Strain Behavior of Reinforcing Steel Including Effect of Buckling , 1999 .

[9]  F. Zahn.  Design of reinforced concrete bridge columns for strength and ductility , 1985 .

[10]  Panitan Lukkunaprasit,et al.  Enhancement of seismic performance of reinforced concrete columns with buckling-restrained reinforcement , 2011 .

[11]  Tatjana Isaković,et al.  Cyclic response of I-shaped bridge columns with substandard transverse reinforcement , 2015 .

[12]  S. Kunnath,et al.  Material Model Incorporating Buckling of Reinforcing Bars in RC Columns , 2014 .

[13]  Koichi Maekawa,et al.  Reinforcement Stability and Fracture of Cover Concrete in Reinforced Concrete Members , 2002 .

[14]  Yuichi Sato,et al.  Experimental investigation of conditions of lateral shear reinforcements in RC columns accompanied by buckling of longitudinal bars , 2007 .

[16]  Giorgio Monti,et al.  Simulation of reinforcing bar buckling in circular reinforced concrete columns , 2013 .

[17]  Nicholas A Alexander,et al.  Nonlinear stress–strain behaviour of corrosion-damaged reinforcing bars including inelastic buckling , 2013 .

[18]  Oguzhan Bayrak,et al.  Plastic hinge analysis , 2001 .

[19]  Julio Appleton,et al.  Nonlinear cyclic stress-strain relationship of reinforcing bars including buckling , 1997 .

[20]  J. D. L. Llera,et al.  Effect of axial loads in the seismic behavior of reinforced concrete walls with unconfined wall boundaries , 2014 .

[21]  Hong Yang,et al.  Improved Nonlinear Cyclic Stress–Strain Model for Reinforcing Bars Including Buckling Effect and Experimental Verification , 2016 .

[22]  Jack P. Moehle,et al.  Experimental Evaluation of the Seismic Performance of Reinforced Concrete Bridge Columns , 2004 .

[23]  Maurizio Papia,et al.  Instability of Longitudinal Bars in RC Columns , 1988 .

[24]  Z. Bažant,et al.  Stability of Structures: Elastic, Inelastic, Fracture and Damage Theories , 2010 .

[25]  Oguzhan Bayrak,et al.  INELASTIC BUCKLING OF REINFORCING BARS , 2005 .

[26]  Sashi K. Kunnath,et al.  Experimental Studies on Confinement Effect of Steel Hoops in Concrete Columns , 2012 .

[27]  Robert Park,et al.  Evaluation of ductility of structures and structural assemblages from laboratory testing , 1989 .

[28]  Jeffrey M. Rautenberg,et al.  Drift capacity of concrete columns reinforced with high-strength steel , 2013 .

[29]  Jack P. Moehle,et al.  Damage and Implications for Seismic Design of RC Structural Wall Buildings , 2012 .

[30]  T. Kármán,et al.  Untersuchungen über Knickfestigkeit , 1910 .

[31]  Frieder Seible,et al.  Seismic Testing of Bridge Columns Incorporating High-Performance Materials , 2006 .

[32]  Andrea Prota,et al.  Cyclic Behavior of Smooth Steel Reinforcing Bars: Experimental Analysis and Modeling Issues , 2009 .

[33]  Leonardo M. Massone,et al.  Modeling of reinforcement global buckling in RC elements , 2014 .

[34]  Frederic Legeron,et al.  INFLUENCE OF CONCRETE STRENGTH AND TRANSVERSE REINFORCEMENT YIELD STRENGTH ON BEHAVIOR OF HIGH-STRENGTH CONCRETE COLUMNS , 2001 .

[35]  Leonardo M. Massone,et al.  Buckling modeling of reinforcing bars with imperfections , 2009 .

[36]  F. R. Shanley.  Inelastic Column Theory , 1947 .

[37]  R. B. Khadiranaikar,et al.  Behavior of concentrically loaded high performance concrete tied columns , 2012 .

[38]  Su-Min Kang,et al.  Cyclic loading test for reinforced concrete columns with continuous rectangular and polygonal hoops , 2014 .

[39]  Hyun-Do Yun,et al.  Effects of transverse reinforcement on flexural behaviour of high-strength concrete columns , 2004 .

[40]  Sergio M.R. Lopes,et al.  Effects of the compressive reinforcement buckling on the ductility of RC beams in bending , 2012 .

[41]  B. Bresler,et al.  Tie Requirements for Reinforced Concrete Columns , 1961 .

[42]  C. Scribner.  Reinforcement Buckling in Reinforced Concrete Flexural Members , 1986 .

[43]  Leonardo M. Massone,et al.  Fundamental principles of the reinforced concrete design code changes in Chile following the Mw 8.8 earthquake in 2010 , 2013 .