Investigation of Biaxial Bending of Reinforced Concrete Columns Through Fiber Method Modeling

Lejano, Bernardo A.

doi:10.3860/jrsce.v4i3.634

Cited by 9 publications

(8 citation statements)

References 8 publications

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“…It has been also reported that the damages of reinforced concrete (RC) elements caused by earthquakes increased when submitted tomultiaxial excitation (Takizawa et al, 1976, Lejano, 2007.From the axial load-bending interaction diagrams, the yielding and ultimate moment's increases with the level of axial load until the balance point is achieved. The variation of the axial load during an seismic action can change all the hysteretic properties and inelastic response of the RC columns, in particularly the strength, stiffness, and ultimate displacement capacity , CEB, 1996, Bonet et al, 2006.…”

Section: Introductionmentioning

confidence: 97%

“…To characterize the column specimen's responses, cyclic lateral displacements were imposed at the top of the column with progressively increasing demand levels. To understanding the column's behaviour three cycles were repeated for each lateral deformation demand level, and the following nominal peak displacement levels (in mm) were considered: 3, 5, 10,4,12,15,7,20,25,30,35,40,45,50,55,60,65,70,75,80. A more detailed description of the specimens' materials properties and horizontal displacement path type are presented in Table 1 and Figure 2.…”

Section: Axial Load and Displacement Pathmentioning

confidence: 99%

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Numerical Modelling of RC Columns Subjected to Biaxial Horizontal Loading and Variable Axial Load

Furtado¹,

Rodrigues²,

Arêde³

2015

AJCEA

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Annumerical study of RC columns subjected to variable axial load in conjunction with biaxial cyclic bending are presented in this article. The numerical models were built to simulate the response of all specimens using the computer program SeismoStruct and adopting three different modelling strategies, such as lumped plasticity and distributed plasticity (based in displacements and forces formulations) that were adopted in order to obtain the real behaviour of the RC columns. The efficiency of each modelling strategy is evaluated through the comparison between the experimental global hysteretic behaviour, stiffness degradation, columns capacity and energy dissipation and the numerical results.

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Section: Introductionmentioning

confidence: 97%

Section: Axial Load and Displacement Pathmentioning

confidence: 99%

Numerical Modelling of RC Columns Subjected to Biaxial Horizontal Loading and Variable Axial Load

Furtado¹,

Rodrigues²,

Arêde³

2015

AJCEA

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“…Although the results of some numerical models evidence a very good agreement with test results, their practical use for design purposes is limited, since most of them are currently not available and the labour required for the numerical calculation is quite extensive [20]. Therefore, their applications usually remain within the limits of research studies, and the designers often rely on simple interaction equations, between the cross-section internal forces, which may be found in bridge and building specifications such as [1][2][3][4][5]15], for instance.…”

Section: Introductionmentioning

confidence: 97%

“…The research works carried out with this purpose have been based on analytical studies [14,17], experimental investigations [11,26,30], and numerical models [10,19,20]. A large number of these studies took into account other aspects than the elastic or plastic carrying capacity of the cross-sections, such as the possible occurrence of local or overall buckling phenomena of the structural elements in biaxial bending [26,31,32].…”

Section: Introductionmentioning

confidence: 99%

Analytical evaluation of the elastic and plastic resistances of double symmetric rectangular hollow sections under axial force and biaxial bending

Baptista¹

2012

International Journal of Non-Linear Mechanics

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a b s t r a c tIn the recent codes for the design of steel structures, the elastic-plastic methods of analysis are recognised to provide an efficient estimation of the ultimate resistance of some of these structures. These methods are usually based on some basic hypotheses, such as the creation of plastic hinges in the most stressed cross-sections, for instance.As the development of these plastic hinges depends on the interaction between the internal forces and on the cross-section shape, specific equations are required for the analysis of different types of cross-sections. However, most frequently, these equations are not available, or they are expressed by means of simplified expressions; this is usually the case when biaxial bending is involved.This paper presents new interaction criteria for the analysis of steel rectangular hollow sections subjected to an axial force and biaxial bending moments, at the elastic or the plastic limit states (as long as buckling phenomena are not involved). The plastic interaction criteria are presented, in a first step, for some particular combinations of the internal forces, such as axial loading with bending about a main axis, and biaxial bending without axial loading. Then, the global solution for the simultaneous combination of an axial force and bending moments about both the main axes of inertia are described in detail. All these plastic interaction criteria are compared with the corresponding plastic criteria adopted in the Eurocode 3 (EC3). Some suggestions are presented in order to improve the results given by these EC3 criteria.

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“…The stress-strain curve suggested for the analysis was the parabola-rectangle from the Eurocode-2 which did not capture the softening zone. Lejano (2007) extended Kaba and Mahin (1984) fiber Model method to analyse rectangular sections under biaxial loading. The proposed method utilized Bazant's Endochronic theory and Ciampi's model for concrete and steel behavior.…”

Section: Introductionmentioning

confidence: 99%

Partial Confinement Utilization for Rectangular Concrete Columns Subjected to Biaxial Bending and Axial Compression

Fattah

Rasheed

Al-Rahmani³

2017

Int J Concr Struct Mater

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The prediction of the actual ultimate capacity of confined concrete columns requires partial confinement utilization under eccentric loading. This is attributed to the reduction in compression zone compared to columns under pure axial compression. Modern codes and standards are introducing the need to perform extreme event analysis under static loads. There has been a number of studies that focused on the analysis and testing of concentric columns. On the other hand, the augmentation of compressive strength due to partial confinement has not been treated before. The higher eccentricity causes smaller confined concrete region in compression yielding smaller increase in strength of concrete. Accordingly, the ultimate eccentric confined strength is gradually reduced from the fully confined value f cc (at zero eccentricity) to the unconfined value f 0 c (at infinite eccentricity) as a function of the ratio of compression area to total area of each eccentricity. This approach is used to implement an adaptive Mander model for analyzing eccentrically loaded columns. Generalization of the 3D moment of area approach is implemented based on proportional loading, fiber model and the secant stiffness approach, in an incremental-iterative numerical procedure to achieve the equilibrium path of P-e and M-u response up to failure. This numerical analysis is adapted to assess the confining effect in rectangular columns confined with conventional lateral steel. This analysis is validated against experimental data found in the literature showing good correlation to the partial confinement model while rendering the full confinement treatment unsafe.

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Investigation of Biaxial Bending of Reinforced Concrete Columns Through Fiber Method Modeling

Cited by 9 publications

References 8 publications

Numerical Modelling of RC Columns Subjected to Biaxial Horizontal Loading and Variable Axial Load

Numerical Modelling of RC Columns Subjected to Biaxial Horizontal Loading and Variable Axial Load

Analytical evaluation of the elastic and plastic resistances of double symmetric rectangular hollow sections under axial force and biaxial bending

Partial Confinement Utilization for Rectangular Concrete Columns Subjected to Biaxial Bending and Axial Compression

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