Evaluation and comparison of ultimate deformation limits for RC columns

Ozdemir, Muhammed Alperen; Kazaz, İlker; Özkaya, Suat Gökhan

doi:10.1016/j.engstruct.2017.10.050

Cited by 14 publications

(6 citation statements)

References 16 publications

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“…For a comprehensive performance-based seismic assessment of existing or newly constructed RC framed structures, estimating the displacement capacity of the columns and their deformation relationships is crucial [34]. The displacement and deformation capacity of reinforced concrete columns are formed by sectional damage under seismic loads [35].…”

Section: Non-linear Behavior Of Reinforced Concrete Columnsmentioning

confidence: 99%

Non-linear displacement and deformation damage limits of reinforced concrete circular columns by analytical observations according to TBSC 2018

Foroughi

Yüksel

2022

International Advanced Researches and Engineering Journal

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In the study, based on the non-linear calculation methods used to determine the seismic performance of structures in TBSC 2018, the stress-strain, moment-curvature, displacement capacity, plastic rotation limits, and deformation-based damage limit values of the reinforced concrete circular cross-section columns were calculated and compared according to different design parameters. The studied effects of the design parameters on the non-linear relation of reinforced concrete columns were also evaluated in terms of strength, curvature, and displacement ductility of the sections. All design parameters affecting the non-linear behavior and deformation limits of the reinforced concrete circular cross-section columns were taken into account. Deformation demands for reinforced concrete structural members are essential for detecting element damage. Based on TBSC (2018), non-linear relationships of reinforced concrete columns were obtained in order to calculate plastic hinge properties and deformation limits. For the Limited Damage, Controlled Damage, and Collapse Prevention performance levels defined for the structural elements in TBSC 2018, plastic rotation and deformation limit values were obtained according to the characteristic values calculated from the non-linear analyzes of reinforced concrete circular columns. For column models, damage limits and damage zones calculated based on TBSC 2018 were shown on the visually obtained moment-curvature relationships. Depending on the upper deformation limit values derived, cross-sectional deformation damage levels were determined and evaluated using the moment-curvature relationships. The variation of the non-linear behavior of column models by design parameters and deformation-based damage limits were examined both analytically and visually. The deformation limits remain in a safer direction as a result of increasing longitudinal and spiral reinforcement ratios for the reinforced concrete circular columns.

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Section: Non-linear Behavior Of Reinforced Concrete Columnsmentioning

confidence: 99%

Non-linear displacement and deformation damage limits of reinforced concrete circular columns by analytical observations according to TBSC 2018

Foroughi

Yüksel

2022

International Advanced Researches and Engineering Journal

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“…In the moment-curvature relationship, the RC shear wall peak displacement value up to the yield curvature can be calculated by Equation (1). The lumped plastic rotation ( ), along the plastic hinge length ( ) is then computed using Equation (2).…”

Section: Nonlinear Displacement In Reinforced Concrete Shear Wallsmentioning

confidence: 99%

“…Predicting the deformation capacity of RC shear walls is very important for a comprehensive performance-based seismic evaluation of existing or new buildings [1]. In order to achieve a more accurate simulation of the real structural behavior, designers need the accurate momentcurvature relationship for RC members and stress-strain relationships for unconfined and confined concrete [2].…”

mentioning

confidence: 99%

Investigation of nonlinear behavior of high ductility reinforced concrete shear walls

Foroughi

Yüksel

2020

International Advanced Researches and Engineering Journal

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In this study, the nonlinear behavior of ductile reinforced concrete (RC) shear walls having different parameters was analytically investigated. The purpose of this study is to determine the effect of axial load, longitudinal reinforcement ratio and transverse reinforcement ratios on the moment-curvature and lateral force-lateral peak displacement relationships of RC shear walls. RC shear walls that have various parameters were designed by taking into account the regulation of the Turkish Building Earthquake Code (TBEC, 2018). By considering the nonlinear behavior of the materials, behaviors of the RC shear walls were examined within the framework of the moment-curvature relation. The moment-curvature relations of RC shear walls with different parameters were obtained with the Mander model which takes into consideration the lateral confined concrete strength for different parameters. The effects of the analyzed parameters on the nonlinear behavior of the RC shear walls were evaluated in terms of curvature ductility, moment capacity, peak displacement, the angular displacement and displacement ductility values. It was seen that changes in the transverse reinforcement, longitudinal reinforcement, and axial load levels had important influence on the moment-curvature and lateral force-lateral peak displacement behavior of the RC shear walls.

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“…During the seismic performance evaluation of reinforced member of buildings, designers use these proposed deformation limits. However, a limited number of column test results were used for verifying of these expressions and limit states specified at the codes, especially which are based on strain criteria [8]. Proposed expressions and acceptance criteria in seismic action for RC columns needs a through examination using more extensive column databases to improve limit states and their corresponding values.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Deformation Limits in Codes for Reinforced Concrete Columns

Ozdemir¹,

Kazaz²

2018

Anadolu Üniversitesi Bilim Ve Teknoloji Dergisi - B Teorik Bilimler

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Predicting the deformation capacities of reinforced concrete columns is necessary for seismic evaluation of existing and new buildings. These deformation capacities have been set in terms of the rotation angle in EC-8 (2005) and ASCE/SEI 41 (2013) and strain in Turkish Seismic Code (2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016). In this study, finite element models of sixty-nine experimentally tested column specimens were modelled and analyzed by using nonlinear finite element method. As a result of the analyzes, data, which is difficult to measure in experiments such as the strain of outer fiber of confined concrete, were calculated and compared with code deformation limits. As a result of this study, EC-8 column ultimate deformation limits found to remain unsafe according to calculated deformation capacities herein. Taking into account TSC and ASCE/SEI 41, calculated capacities are in the safe region. However, for the axial load ratios over 0.45 and columns produced of high strength concrete, code limit state expressions are unable to predict the limit values correctly. In addition, TSC may significantly limit the deformation capacity of RC columns under their actual capacities. There is a need to improve these code limits using a more extensive column database which includes different design parameters.

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Evaluation and comparison of ultimate deformation limits for RC columns

Cited by 14 publications

References 16 publications

Non-linear displacement and deformation damage limits of reinforced concrete circular columns by analytical observations according to TBSC 2018

Non-linear displacement and deformation damage limits of reinforced concrete circular columns by analytical observations according to TBSC 2018

Investigation of nonlinear behavior of high ductility reinforced concrete shear walls

Evaluation of Deformation Limits in Codes for Reinforced Concrete Columns

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