Performance of reinforced concrete columns under bi-axial lateral force/displacement and axial load

Shirmohammadi, Fatemeh; Esmaeily, Asad

doi:10.1016/j.engstruct.2015.04.042

Cited by 25 publications

(10 citation statements)

References 17 publications

(25 reference statements)

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“…The need to effectively simulate the axial force-biaxial moment interaction in columns, in the evaluation of seismic vulnerability of buildings, has led different researchers to develop models based on fiber-based distributed inelasticity approach (Attarchian et al, 2018; Shirmohammadi and Esmaeily, 2015; Taucer et al, 1991; Zeris and Mahin, 1991) as well as using the lumped plasticity approach (Kunnath and Reinhorn, 1990; Romão et al, 2004; Rodrigues et al, 2012a). The efficiency of any modeling approach depends on its ability to effectively capture the intrinsic effects of concrete cracking, reinforcing bar yielding, loss of bond and anchorage of reinforcing bars, concrete crushing, and bar buckling.…”

Section: Hysteresis Model For Rc Columnsmentioning

confidence: 99%

Effect of bidirectional excitation on seismic performance of regular RC frame buildings designed for modern codes

2021

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The existing practice to estimate seismic performance of a regular building is to carry out nonlinear time history analysis using two-dimensional models subjected to unidirectional excitations, even though the multiple components of ground motion can affect the seismic response, significantly. During seismic shaking, columns are invariably subjected to bending in two orthogonal vertical planes, which leads to a complex interaction of axial force with the biaxial bending moments. This article compares the seismic performance of regular and symmetric RC moment frame buildings for unidirectional and bidirectional ground motions. The buildings are designed and detailed according to the Indian codes, which are at par with the other modern seismic codes. A fiber-hinge model, duly calibrated with the biaxial experimental results, is utilized to simulate the inelastic behavior of columns under bidirectional bending. A comparison of the estimated seismic collapse capacity is presented, illustrating the importance of considering the bidirectional effects. The results from fragility analysis indicate that the failure probabilities of buildings under the bidirectional excitation are significantly higher as compared to those obtained under the unidirectional excitation.

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Section: Hysteresis Model For Rc Columnsmentioning

confidence: 99%

Effect of bidirectional excitation on seismic performance of regular RC frame buildings designed for modern codes

2021

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“…Therefore, understanding the performance of RC structures under multi-directional excitation is important. The current research on seismic behavior of RC column under biaxial loading is mainly experimental works [Oliva and Clough (1987); Zeris and Mahin (1992); Qiu, Li, Pan et al (2002); Li, Mander, and Dhakal (2008); Khaled, Massicotte and Tremblay (2011); Lu, Li, Wang et al (2012); ; Germano, Tiberti and Plizzari (2015); Nojavan, Schultz, Haselton et al (2015); Shirmohammadi and Esmaeily (2015); Jung, Wilcoski and Andrawes (2018)]. These experimental studies have shown that the loading paths have a significant influence on seismic behavior of RC columns.…”

Section: Introductionmentioning

confidence: 99%

The Behavior of Rectangular and Circular Reinforced Concrete Columns Under Biaxial Multiple Excitation

Salami¹,

Dizaj²,

Kashani³

2019

Computer Modeling in Engineering &Amp; Sciences

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The aim of this study is to investigate the dynamic performance of rectangular and circular reinforced concrete (RC) columns considering biaxial multiple excitations. For this purpose, an advanced nonlinear finite element model which can simulate various features of cyclic degradation in material and structural components is used. The implemented nonlinear fiber beam-column model accounts for inelastic buckling and low-cycle fatigue degradation of longitudinal reinforcement and can simulate multiple failure modes of RC columns under dynamic loading. Hypothetical rectangular and circular columns are used to investigate the failure modes of RC columns. A detailed ground motion selection is implemented to generate real mainshock and aftershocks. It was found that multiple excitations due to aftershock has the potential of increasing the damage of the RC columns and longitudinal reinforcements are significantly affected low-cycle fatigue. Also, it was found that rectangular column is more sensitive to accumulative damage due to cyclic fatigue. This study increases the accuracy of structural analysis of RC columns and consequently improves understanding the failure modes of RC columns with different cross-sectional shapes.

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“…It was shown that the transverse reinforcement ratio and initial axial loads play a significant role for the ductility of existing buildings and the influence of varying axial and lateral loading histories on the ductility was inspected [9]. For instance, experiments on ten RC columns with non-seismic detailing, subjected to different combinations of axial and cyclic loading histories, revealed the vital role of the acting axial load on the lateral displacement capacity [10,11]. Such studies have led to the proposal of a damage assessment criterion for distinguishing different failure modes, i.e., flexural, shear, and axial failures [12].…”

Section: Introductionmentioning

confidence: 99%

Enhanced empirical models for predicting the drift capacity of less ductile RC columns with flexural, shear, or axial failure modes

Kakavand

Allahvirdizadeh

2019

Front. Struct. Civ. Eng.

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Capacity of components subjected to earthquake actions is still a widely interesting research topic. Hence, developing precise tools for predicting drift capacities of reinforced concrete (RC) columns is of great interest. RC columns are not only frequently constructed, but also their composite behavior makes the capacity prediction a task faced with many uncertainties. In the current article, novel empirical approaches are presented for predicting flexural, shear and axial failure modes in RC columns. To this aim, an extensive experimental database was created by collecting outcomes of previously conducted experimental tests since 1964, which are available in the literature. It serves as the basis for deriving the equations for predicting the drift capacity of RC columns by different regression analyses (both linear with different orders and nonlinear). Furthermore, fragility curves are determined for comparing the obtained results with the experimental results and with previously proposed models, like the ones of ASCE/SEI 41-13. It is demonstrated that the proposed equations predict drift capacities, which are in better agreement with experimental results than those computed by previously published models. In addition, the reliability of the proposed equations is higher from a probabilistic point of view.

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Performance of reinforced concrete columns under bi-axial lateral force/displacement and axial load

Cited by 25 publications

References 17 publications

Effect of bidirectional excitation on seismic performance of regular RC frame buildings designed for modern codes

Effect of bidirectional excitation on seismic performance of regular RC frame buildings designed for modern codes

The Behavior of Rectangular and Circular Reinforced Concrete Columns Under Biaxial Multiple Excitation

Enhanced empirical models for predicting the drift capacity of less ductile RC columns with flexural, shear, or axial failure modes

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