Shear Deformations of Slender Reinforced Concrete Walls under Seismic Loading

For accurate assessment of performance levels in reinforced concrete (RC) members, it is important to well define deformation limits at particular damage states. For RC walled building, investigation of the deformation limits of RC structural walls is required to define limit states and corresponding limiting values. Numerical investigations were carried out on barbell shape and rectangular RC walls with confined boundaries to evaluate response curves and ultimate deformations. A nonlinear 2D and 3D finite elements (FE) models were built in order to simulate the load-deformation relations under monotonic loading as well as cracking and damage patterns of previously tested walls. The FE models were able to simulate the backbone curves with good accuracy as well as the ability of boundary columns in reducing damage level. The 3D FE model simulated very well the ultimate deformation compared to 2D models. A sectional fibre model combined with plastic hinge length and shear deformation component is proposed in order to simulate the backbone curves and the ultimate deformation with less computational cost compared to 3D FE analysis. The model was able to provide relatively accurate backbone curves with very good estimation of ultimate drift.

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“…The shear deformation of walls is estimated using the empirical equation developed by Beyer et al [27] as given by Eq. 6.…”

Section: Withmentioning

confidence: 99%

Numerical Study on the Ultimate Deformation of RC Structural Walls with Confined Boundary Regions

Taleb

Watanabe

Kôno

2017

Period. Polytech. Civil Eng.

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“…Under cyclic loading, Smith et al [12] tested a hybrid precast wall panel with mild steel and PT steel reinforcement and discovered that failure occurred prematurely at the joint between the wall's base and the foundation beam because the concrete's strength was less than specified and the confinement hoops were not positioned properly at the wall's toes. Thirty-four thin structural RC walls were evaluated under quasicyclic loads for Beyer et al's [13] study on the ratio of shear-to-flexural deformations. For shear walls whose sheartransfer mechanism is not weakening, it was discovered.…”

Section: Introductionmentioning

confidence: 99%

Study on Vertical Dowel Connections in Precast Walls

Karthikeyan,

Santhi,

Kumaran

2023

Advances in Civil Engineering

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Precast concrete wall connections using dowels are becoming more popular and effective these days due to their ease of installation and cost. In this study, one-third scale models of slender and intermediate precast walls with dowel connections and monolithic concrete walls were tested experimentally and numerically under lateral cyclic loads. The experiments on precast walls and monolithic walls were conducted on a loading frame of capacity 20 T and the cyclic loads were applied until the failure of the wall specimens. The numerical studies on walls were carried out using Abaqus.cae software, and the same cyclic loads were applied. The responses such as ultimate load, displacement, cracking pattern, ductility, and energy dissipation capacity of precast walls were compared. The results obtained from the numerical investigation proved to be effective in simulating the actual behavior of the studied precast and monolithic walls, thereby reducing the burden of doing physical tests on a huge number of precast wall specimens.

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“…However, experiments have shown that the contribution of shear strains to the overall deflections can be considerable not only in shear-critical but also in flexure-critical elements (Huang et al, 2019a;Beyer et al, 2011;Debernardi et al, 2006;Hansapinyo et al, 2003;Vecchio and Emara, 1992). The cracking of concrete in elements subjected to service level shear stresses causes a significant degradation in the shear modulus.…”

Section: Introductionmentioning

confidence: 99%

Shear Strains at Service Load Conditions in Cracked Reinforced Concrete Elements Subjected to Shear

Rahal

2020

Journal of Engineering Research is an international, peer-revie

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The contribution of the shear strains to the overall deformations of reinforced concrete (RC) elements is typically neglected. However, when RC cracks in shear, its shear modulus is significantly reduced, and the contribution of the shear strains to the overall deformations of the elements is increased. Experimental testing has shown that shear deformations can be significant. Under service conditions, RC can be cracked in shear and hence, a simple method for the calculation of the effective cracked shear modulus is desired. Research has shown that the part of the shear response after cracking and before yielding can be well modeled using a straight line. This paper uses existing experimental data and the equations of the modified compression field theory (MCFT) to examine this part of the response in RC membrane elements and to develop two simple equations that can be used to characterize the straight line. The proposed equations are evaluated by comparing their results with existing experimental data on the shear response of thin RC membrane elements. The comparison includes the post-cracking response and the shear strains at estimated service level loading. A very good agreement is obtained between the experimental and the calculated results. The simplicity of the proposed equations is illustrated using a numerical example.

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Shear Deformations of Slender Reinforced Concrete Walls under Seismic Loading

Cited by 10 publications

References 12 publications

Numerical Study on the Ultimate Deformation of RC Structural Walls with Confined Boundary Regions

Numerical Study on the Ultimate Deformation of RC Structural Walls with Confined Boundary Regions

Study on Vertical Dowel Connections in Precast Walls

Shear Strains at Service Load Conditions in Cracked Reinforced Concrete Elements Subjected to Shear

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