A parametric investigation on applicability of the curved shell finite element model to nonlinear response prediction of planar RC walls

This study investigates the ability of a finite element model based on curved shell element formulation in predicting nonlinear behavior of planar RC structural walls, identifying the strengths and limitations of this modeling approach. For this purpose, a parametric validation is conducted in addition to verification of the model simulation against experimental results of several wall specimens tested in literature. The effects of variations in total length, thickness, shear-span ratio, axial load ratio, confinement, as well as the horizontal and vertical reinforcement ratios are investigated at both global and local levels. For scrutinizing the global response, lateral load versus total, flexural and shear deformation predictions are used. For local response, sensitivity of the stress and strain distributions throughout the length and height of the wall models to the parameters noted above is evaluated. The capabilities and deficiencies of the modelling approach are discussed in detail in light of the numerical versus experimental as well as parametric verifications. The model is found to be able to predict most of the experimentally observed failure mechanisms of rectangular walls including global out-of-plane instability under in-plane loading, concrete crushing at the base, diagonal tension and diagonal compression as well as sliding shear. The model is not able to represent bar buckling, bar fracture and the potential subsequent secondary failure modes such as instability of the compression boundary zone due to progressive asymmetric concrete crushing at the base. The parametric study indicated sensitivity of the model response to the variation of the parameters known to be influential on the nonlinear response of planar RC walls.

[1]  John B. Mander,et al.  Seismic Energy Based Fatigue Damage Analysis of Bridge Columns: Part 1 - Evaluation of Seismic Capacity , 1994 .

[2]  Stefano Pampanin,et al.  Numerical Modeling of Rectangular Reinforced Concrete Structural Walls , 2017 .

[3]  J. Moehle,et al.  Stability of Slender Wall Boundaries Subjected to Earthquake Loading , 2017 .

[4]  Stefano Pampanin,et al.  Comparative in-plane pushover response of a typical RC rectangular wall designed by different standards , 2014 .

[5]  T. Isakovic,et al.  Shake-Table Response of a Coupled RC Wall with Thin T-Shaped Piers , 2017 .

[6]  William John Goodsir.  The design of coupled frame-wall structures for seismic actions , 1985 .

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

[8]  G A Chang,et al.  SEISMIC ENERGY BASED FATIGUE DAMAGE ANALYSIS OF BRIDGE COLUMNS: PART I - EVALUATION OF SEISMIC CAPACITY. TECHNICAL REPORT , 1994 .

[9]  Katrin Beyer,et al.  Experimental campaign on thin RC columns prone to out-of-plane instability: numerical simulation using shell element models , 2017 .

[10]  Stefano PAMPANIN,et al.  SIMULATION OF OUT-OF-PLANE INSTABILITY IN RECTANGULAR RC STRUCTURAL , 2014 .

[11]  J. Wallace,et al.  Flexural modeling of reinforced concrete walls- : Experimental verification , 2006 .

[12]  J. Vásquez,et al.  Comparative Study of State-of-the-Art Macroscopic Models for Planar Reinforced Concrete Walls , 2018, ACI Structural Journal.

[13]  Dawn E. Lehman,et al.  Impact of Axial Load on the Seismic Response of Rectangular Walls , 2018, Journal of Structural Engineering.

[14]  Katrin Beyer,et al.  Influence of Lap Splices on the Deformation Capacity of RC Walls. I: Database Assembly, Recent Experimental Data, and Findings for Model Development , 2017 .

[15]  Richard Henry,et al.  Cyclic Testing of Reinforced Concrete Walls with Distributed Minimum Vertical Reinforcement , 2017 .

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

[18]  E. P. Popov,et al.  Hysteric behavior of reinforced concrete structural walls , 1979 .

[19]  Stefano Pampanin,et al.  Evolution of out-of-plane deformation and subsequent instability in rectangular RC walls under in-plane cyclic loading: Experimental observation , 2018, Earthquake Engineering & Structural Dynamics.

[20]  Matteo Scolari.  Implementation of PARC_CL 2.0 crack model for reinforced concrete members subjected to cyclic and dynamic loading , 2017 .

[21]  K. Orakcal,et al.  Cyclic lateral load behavior of squat reinforced concrete walls , 2018 .

[22]  Stefano Pampanin,et al.  Validation of a Numerical Model for Prediction of Out-of-Plane Instability in Ductile Structural Walls under Concentric In-Plane Cyclic Loading , 2018 .

[23]  Stefano Pampanin,et al.  Numerical simulation of shear wall failure mechanisms , 2014 .

[24]  F. Vecchio,et al.  THE MODIFIED COMPRESSION FIELD THEORY FOR REINFORCED CONCRETE ELEMENTS SUBJECTED TO SHEAR , 1986 .

[25]  A. Belarbi,et al.  Constitutive Laws of Concrete in Tension and Reinforcing Bars Stiffened By Concrete , 1994 .

[26]  Sri Sritharan,et al.  T-Shaped RC structural walls subjected to multidirectional loading: Test results and design recommendations , 2017 .

[27]  M. Kowalsky,et al.  Out-of-Plane Buckling of Ductile Reinforced Structural Walls due to In-Plane Loads , 2017 .

[28]  Parra Torres,et al.  Stability of Reinforced Concrete Wall Boundaries , 2015 .

[29]  Stefano Pampanin,et al.  Blind prediction of in-plane and out-of-plane responses for a thin singly reinforced concrete flanged wall specimen , 2017, Bulletin of Earthquake Engineering.

[30]  E. Reissner.  The effect of transverse shear deformation on the bending of elastic plates , 1945 .

[31]  J. Wallace,et al.  Cyclic Testing of Moderate-Aspect-Ratio Reinforced Concrete Structural Walls , 2015 .

[32]  K. Beyer,et al.  Cyclic tensile-compressive tests on thin concrete boundary elements with a single layer of reinforcement prone to out-of-plane instability , 2018, Bulletin of Earthquake Engineering.

[33]  Farhad Dashti.  Out-of-plane instability of rectangular reinforced concrete walls under in-plane loading. , 2017 .

[34]  H. Fukuyama,et al.  Flexure Mechanism and Deformation at Bending-Compression Failure of RC Structural Walls , 2018 .

[35]  Katrin Beyer,et al.  Quasi-static cyclic tests and plastic hinge analysis of RC structural walls , 2009 .

[36]  James Michael LaFave,et al.  Confinement Behavior of Rectangular Reinforced Concrete Prisms Simulating Wall Boundary Elements , 2016 .

[37]  R. D. Mindlin,et al.  Influence of rotary inertia and shear on flexural motions of isotropic, elastic plates , 1951 .

[38]  Katrin Beyer,et al.  Influence of Lap Splices on the Deformation Capacity of RC Walls. II: Shell Element Simulation and Equivalent Uniaxial Model , 2017 .

[39]  J. Almeida,et al.  Stability of thin reinforced concrete walls under cyclic loads: state-of-the-art and new experimental findings , 2016, Bulletin of Earthquake Engineering.

[40]  Richard Henry,et al.  State-of-the-art in nonlinear finite element modeling of isolated planar reinforced concrete walls , 2019, Engineering Structures.

[41]  John W. Wallace,et al.  Practical Nonlinear Modeling of Reinforced Concrete Structural Walls , 2016 .