Hysteretic energy and damping capacity of flexural elements constructed with different concrete strengths

Elmenshawi, Abdelsamie; Brown, Tom

doi:10.1016/j.engstruct.2009.09.016

Cited by 51 publications

(16 citation statements)

References 3 publications

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“…In the latter systems, such an equivalent viscous damping is often expressed as a function of ductility, drift ratios or other displacement parameters which are considered a measure of damage (e.g. [30]). In other words, the equivalent viscous damping ratio increases as damage increases in the structure.…”

Section: Hysteretic Dampingmentioning

confidence: 99%

Damping mechanisms and damping ratios in vibrating unreinforced stone masonry

Elmenshawi

Sorour

Mufti

et al. 2010

Engineering Structures

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Section: Hysteretic Dampingmentioning

confidence: 99%

Damping mechanisms and damping ratios in vibrating unreinforced stone masonry

Elmenshawi

Sorour

Mufti

et al. 2010

Engineering Structures

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“…As stated by Elmenshawi and Brown [3], the relation between a RC element's displacement ductility and dissipated energy is complex due to the sensitivity of both factors to the element variables. For each column tested, the calculated energy dissipation evolution was normalised with the total dissipated energy until the first yield point (E y ) until the column conventional failure, i.e.…”

Section: Normalised Dissipated Energy Vs Displacement Ductilitymentioning

confidence: 99%

“…As given by the proposed equation, for a displacement ductility of 4 (corresponding to the minimum required ductility to withstand a severe earthquake), the corresponding normalised dissipated energy estimated is 12. Elmenshawi and Brown [3] and Nmai and Darwin [13] have investigated this relationship for beams (with zero axial force), proposing similar equations. From this expression a value of normalised dissipated energy for the same displacement ductility is 3 time higher, around 35.…”

Section: Normalised Dissipated Energy Vs Displacement Ductilitymentioning

confidence: 99%

“…Three cycles were repeated for each lateral deformation demand level. This procedure allows for the understanding of the column's behaviour, a comparison between different tests and provides information for the development and calibration of numerical models, 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.…”

Section: Test Programmentioning

confidence: 99%

“…For RC structures designed to accommodate damage without collapse due to a seismic event, the input energy can be dissipated through RC element's hysteretic response, without a significant reduction in strength [3]. Nonlinear static methods, for assessment or design, use energy dissipation capacity related parameters to evaluate the inelastic earthquake response of structures and to describe the strength and stiffness degradation of RC elements subjected to cyclic loading [4].…”

Section: Introductionmentioning

confidence: 99%

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A comparative analysis of energy dissipation and equivalent viscous damping of RC columns subjected to uniaxial and biaxial loading

Rodrigues

Varum

Arêde

et al. 2012

Engineering Structures

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a b s t r a c tThe hysteretic behaviour of RC columns has been object of many experimental studies over the past years. However, the majority of these studies are focused on unidirectional loading. An experimental program was carried out where 24 columns were tested for different loading histories, under uniaxial and biaxial conditions. The experimental results are presented in this paper and are discussed in terms of global column behaviour, and particularly with regards to energy dissipation and damping capacity. The energy dissipation capacity of the columns was evaluated in terms of cumulative dissipated energy, comparing uniaxial and biaxial test results, and individual cycle dissipated energy. Ultimately, an equation relating the normalised dissipated energy with the displacement ductility is proposed. The equivalent viscous damping was analysed by comparing the uniaxial with biaxial test results, demonstrating the high influence of the load path in the biaxial response of RC columns. Proposals for estimating the equivalent viscous damping given by other authors are compared with the experimental results. Finally, simplified expressions are proposed to estimate equivalent viscous damping in RC columns under biaxial loading.

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Energy dissipation models for RC members and structures

Grammatikou

Fardis

Biskinis

2018

Earthq Engng Struct Dyn

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Summary The unloading parameters of hysteretic models for RC members are given in terms of their shear‐span‐to‐depth ratio and the viscous damping used to model other energy dissipation sources. They reflect the energy dissipation in full post‐yield load cycles in 534 tests of rectangular or circular members. Pre‐yield hysteretic energy dissipation—ignored if the model is elastic till yielding—amounts in the tests to a mean viscous damping around 8.5% and can be considered in nonlinear response‐history analysis through a new model which combines constant elastic stiffness in virgin loading with hysteretic energy dissipation both before and after yielding. Models with linear behavior till yielding and hysteretic energy dissipation only after it come closer to the results of the new model if viscous damping is 5%.

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Hysteretic energy and damping capacity of flexural elements constructed with different concrete strengths

Cited by 51 publications

References 3 publications

Damping mechanisms and damping ratios in vibrating unreinforced stone masonry

Damping mechanisms and damping ratios in vibrating unreinforced stone masonry

A comparative analysis of energy dissipation and equivalent viscous damping of RC columns subjected to uniaxial and biaxial loading

Energy dissipation models for RC members and structures

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