Three-dimensional finite element formulation for nonlinear dynamic analysis of seismic site and structure response

The equivalent viscous damping is a key parameter in the prediction of the maximum nonlinear response. Damping constitutes a major source of uncertainty in dynamic analysis. This paper studies the effect of using viscous damping, on the reduction of the seismic responses of reinforced concrete RC frame buildings modeled as three-dimensional multi degree of freedom (MDOF) systems, and the use of nonlinear time history analysis as a method of visualized behavior of buildings in the elastic and inelastic range. This study focuses on the implications of the available modeling options on analysis. This article illustrates the effect of using the initial or tangent stiffness in Rayleigh damping in analysis of structures. Correspondingly, this work is also concerned with the estimation of Rayleigh, mass-proportional or stiffness-proportional damping on engineering demand parameters (EDPs). As a result of a series of considerations, a damping modeling solution for nonlinear time history analysis (NLTHA) was carried out to compute the damage index. The application example is a building designed according to reinforced concrete code BAEL 91 and Algerian seismic code RPA 99/Version 2003 under seven earthquake excitations. The simulations demonstrated the accuracy and effectiveness of the proposed method to account for all of the above effects.

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“…Ground motions observed at a definite site usually depend on the type of the earthquake (fault mechanism, the way seismic wave propagation) [46].…”

Section: Ground Motion Selection Earthquakementioning

confidence: 99%

Effect of the viscous damping on the seismic response of Low-rise RC frame building

Hamed

Davenne

2020

redin

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Section: Introductionmentioning

confidence: 99%

“…The constitutive framework of these models, based on the monitoring of stresses in different predefined directions, is similar to discrete models with the difference that the model is formulated through the continuum approach. The microplane model was recently applied in predicting the phenomena related to dynamic fracture [18,19] as well as nonlinear dynamic analysis of RC frame structures under seismic loading [20].The other possibility is discontinuum based modelling where discontinuum state of the structure is assumed a priori, leading to discrete element method (DEM), firstly developed for granular assemblies with the common idea of idealization of the material as assembly of particles with joints between them. The latter has been extended to other heterogeneous brittle materials like concrete [21].…”

mentioning

confidence: 99%

Numerical modelling of reinforced‐concrete structures under seismic loading based on the finite element method with discrete inter‐element cracks

Nikolić

Živaljić

Smoljanović

et al. 2016

Earthq Engng Struct Dyn

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Summary The behaviour of the earthquake excitated reinforced concrete (RC) structures up to the collapse, previously designed according to the prescriptions of Eurocode 8 cannot be fully predetermined because of the diversity of the nature of the earthquake. Thus, one needs to make a judicious choice between the two ductility classes balancing between the desired response of the structure, dimension of structural elements, costs and complexity of the design and construction. Powerful numerical models stand as significant tools to obtain more insight into the peculiarity of each structure. This paper presents a numerical model for dynamic analysis and prediction of the collapse of RC structures under the seismic loading based on finite discrete element method. The model includes several numerical algorithms which are essential for realistic description of highly non‐linear effects of these structures: cyclic crack opening‐closing mechanism based on discrete cracks, interaction between the reinforcement and concrete taken by steel strain‐slip relation, the influence of adjacent cracks to the slip of reinforcing bar, local slip of reinforcing bar because of a high plastic deformation under reversed cyclic loading, the influence of the curvature of reinforcing bar to yield stress reduction of the steel and cyclic behaviour of concrete and steel. Performance of the model was demonstrated through incremental dynamic analysis of RC wall, previously designed according to the Eurocode 8 for medium and high ductility classes. The presented results demonstrated the ability of the model for simulation of the crack patterns and collapse of these structures. Copyright © 2016 John Wiley & Sons, Ltd.

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Effect of site amplification on seismic fragility of RC building with different infill configurations using synthetic ground motions

Motiani

Vasanwala

Thaker

2021

Innov. Infrastruct. Solut.

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Three-dimensional finite element formulation for nonlinear dynamic analysis of seismic site and structure response

Cited by 3 publications

References 20 publications

Effect of the viscous damping on the seismic response of Low-rise RC frame building

Effect of the viscous damping on the seismic response of Low-rise RC frame building

Numerical modelling of reinforced‐concrete structures under seismic loading based on the finite element method with discrete inter‐element cracks

Effect of site amplification on seismic fragility of RC building with different infill configurations using synthetic ground motions

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