Rotation-Based Shear Failure Model for Lightly Confined RC Columns

AbstractA shear failure model for nonductile RC columns that sustain flexural yielding prior to shear failure is proposed. The model, which relates shear failure to column end rotation, was derived by performing a forward stepwise linear regression on a database compiled from column tests. Critical parameters that affect rotation capacity at shear failure were found to be axial load, spacing (rather than amount) of transverse reinforcements, and nominal shear stress. The model is suitable for use in nonlinear frame analyses using either a lumped-plasticity or fiber-section column idealization. The model also can be used to determine rotation limits for performance-based assessment of existing buildings.

[1]  Wassim M. Ghannoum.  Experimental and analytical dynamic collapse study of a reinforced concrete frame with light transverse reinforcement , 2007 .

[2]  A. Belarbi,et al.  Constitutive Laws of Softened Concrete in Biaxial Tension Compression , 1995 .

[3]  M. Saatcioglu,et al.  Inelastic analysis of reinforced concrete columns , 2000 .

[4]  Santiago Pujol,et al.  Drift Capacity of Reinforced Concrete Columns Subjected to Cyclic Shear Reversals , 1999, SP-187: Seismic Response of Concrete Bridges.

[5]  Mjn Priestley,et al.  Seismic Shear Strength of Circular Reinforced Concrete Columns , 1989 .

[6]  Jack P. Moehle,et al.  Dynamic Collapse Analysis of a Concrete Frame Sustaining Column Axial Failures , 2012 .

[7]  Michael P. Collins,et al.  EVALUATION OF SHEAR DESIGN PROCEDURES FOR REINFORCED CONCRETE MEMBERS UNDER AXIAL COMPRESSION , 2001 .

[8]  J. Moehle,et al.  Seismic Tests of Concrete Columns with Light Transverse Reinforcement , 2006 .

[9]  Toshimi Kabeyasawa,et al.  Axial-shear-flexure interaction approach for reinforced concrete columns , 2007 .

[10]  M. Eberhard,et al.  Effective Stiffness of Reinforced Concrete Columns , 2009 .

[11]  M. Saatcioglu,et al.  Response of Reinforced Concrete Columns to Simulated Seismic Loading , 1989 .

[12]  Yan Xiao,et al.  Seismic Shear Strength of Reinforced Concrete Columns , 1994 .

[13]  B. Taranath.  Seismic Rehabilitation of Existing Buildings , 2004 .

[14]  Guney Ozcebe,et al.  HYSTERETIC BEHAVIOR OF ANCHORAGE SLIP IN R/C MEMBERS , 1992 .

[15]  Jack P. Moehle,et al.  COLLAPSE OF LIGHTLY CONFINED REINFORCED CONCRETE FRAMES DURING EARTHQUAKES , 2006 .

[16]  Jack P. Moehle,et al.  Drift Capacity of Reinforced Concrete Columns with Light Transverse Reinforcement , 2005 .

[17]  Jack P. Moehle,et al.  Shake-Table Tests of a Concrete Frame Sustaining Column Axial Failures , 2012 .

[18]  Mervyn J. Kowalsky,et al.  SHEAR AND FLEXURAL BEHAVIOR OF LIGHTWEIGHT CONCRETE BRIDGE COLUMNS IN SEISMIC REGIONS , 1999 .

[19]  J. Moehle,et al.  SHEAR STRENGTH MODEL FOR LIGHTLY REINFORCED CONCRETE COLUMNS , 2004 .