Nonlinear Analysis of RC Beam Subject to Cyclic Loading

“…The definition of a moment-mean curvature relationship, that simulates the behavior of the whole cracked element, was proposed by Grimaldi and Rinaldi (2000) in the case of monotonic loads and by Kwak and Kim (2001) in case of cyclic loads.…”

Section: Introductionmentioning

confidence: 99%

Softening behavior of reinforced concrete beams under cyclic loading

Marfia

Rinaldi

Sacco

2004

International Journal of Solids and Structures

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“…Unlike an RC beam subjected to one concentrated load at the mid-span, where the plastic deformation is concentrated at the mid-span with narrow width, the specimen in this group accompanies uniformly distributed wide plastic deformation within the two loading points. Accordingly, the plastic hinge length does not need to be precisely taken into consideration for an accurate estimation of the ultimate resisting capacity (Kwak and Kim, 2001a;Kwak and Kim, 2001b). Finite elements with uniform mesh size of l ¼ 10 cm are used in modelling the structure.…”

Section: Group 1 Specimenmentioning

confidence: 99%

Inelastic behaviour of PSC beams with unbonded external tendons

Kwak¹,

Son²

2010

Magazine of Concrete Research

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In this paper, an analytical method that can describe the structural behaviour of prestressed concrete (PSC) bridges with unbonded external tendons is developed. Since the unbonded external tendon is directly connected to the deviators while maintaining a straight configuration, it has a different deformation field from that of concrete and accompanies a secondary effect caused by the change of the primary eccentricity between the concrete and external tendon. The friction slip at the deviators is also taken into consideration on the basis of the force equilibrium between the friction force and the driving force. Moreover, all the material non-linearities and time-dependent deformations such as creep and shrinkage of concrete and relaxation of the tendon are included because the centroidal axis of a section changes according to cracking and time-dependent effects in the constituent materials. Through correlation studies between experimental data and analytical results, it is verified that the proposed numerical model can effectively predict the structural behaviour of PSC bridges with comparative precision.

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“…It is important to note that, in this case, the constitutive laws are valid only for specific geometries of the cross section and, in many cases, the mechanical behavior of the cross sections in their two perpendicular directions is completely uncoupled. For example in the work of Kwank and Kim [127] a moment-curvature relationship is defined for the study of reinforced concrete (RC) beams subjected to cyclic loading. This method is recommended by certain authors due to its numerical efficiency when compared with the full three-dimensional formulation of the nonlinear problem.…”

Section: Rc Beam Structuresmentioning

confidence: 99%

Constitutive and Geometric Nonlinear Models for the Seismic Analysis of RC Structures with Energy Dissipators

Mata

Barbat

Oller

et al. 2008

Arch Computat Methods Eng

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Nowadays, the use of energy dissipating devices to improve the seismic response of RC structures constitutes a mature branch of the innovative procedures in earthquake engineering. However, even though the benefits derived from this technique are well known and widely accepted, the numerical methods for the simulation of the nonlinear seismic response of RC structures with passive control devices is a field in which new developments are continuously preformed both in computational mechanics and earthquake engineering. In this work, a state of the art of the advanced models for the numerical simulation of the nonlinear dynamic response of RC structures with passive energy dissipating devices subjected to seismic loading is made. The most commonly used passive energy dissipating devices are described, together with their dissipative mechanisms as well as with the numerical procedures used in modeling RC structures provided with such devices. The most important approaches for the formulation of beam models for RC structures are reviewed, with emphasis on the theory and numerics of formulations that consider both geometric and constitutive sources on nonlinearity. In the same manner, a more complete treatment is given to the constitutive nonlinearity in the context of fiber-like approaches including the corresponding cross sectional analysis. Special attention is paid to the use of damage indices able of estimating the remaining load carrying capacity of structures after a seismic action. Finally, nonlinear constitutive and geometric formulations for RC beam elements are examined, together with energy dissipating devices formulated as simpler beams with adequate constitutive laws. Numerical examples allow to illustrate the capacities of the presented formulations.

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Nonlinear Analysis of RC Beam Subject to Cyclic Loading

Cited by 25 publications

References 14 publications

Softening behavior of reinforced concrete beams under cyclic loading

Softening behavior of reinforced concrete beams under cyclic loading

Inelastic behaviour of PSC beams with unbonded external tendons

Constitutive and Geometric Nonlinear Models for the Seismic Analysis of RC Structures with Energy Dissipators

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