Seismic reliability assessment of code-conforming reinforced concrete buildings made with electric arc furnace slag aggregates

Faleschini, Flora; Zanini, Mariano Angelo; Toska, Klajdi

doi:10.1016/j.engstruct.2019.05.083

Cited by 32 publications

(13 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3. The RC frames correspond to three residential RC buildings (Faleschini et al 2019). The frames, comprising 3-, 6-and 9-storey buildings, were designed according to the Italian Building Code (CSLLPP 2018) for a low seismicity zone (475-yr return Fig.…”

Section: Case-study Framesmentioning

confidence: 99%

Cyclic engagement of hysteretic steel dampers in braced buildings: a parametric investigation

Gandelli

Domenico

Quaglini

2021

Bull Earthquake Eng

View full text Add to dashboard Cite

Hysteretic steel dampers have been effectively used to improve the seismic performance of framed buildings by confining the dissipation of seismic energy into sacrifical, replaceable devices which are not part of the gravity framing system. The number of cycles sustained by the dampers during the earthquake is a primary design parameter, since it can be associated to low-cycle fatigue, with ensuing degradation of the mechanical properties and potential failure of the system. Current standards, like e.g. the European code EN 15129, indeed prescribe, for the initial qualification and the production control of hysteretic steel dampers, cyclic tests in which the devices are assessed over ten cycles with amplitude equal to the seismic design displacement dbd. This paper presents a parametric study focused on the number of effective cycles of the damper during a design earthquake in order to assess the reliability of the testing procedure proposed by the standards. The study considers typical applications of hysteretic steel dampers in low and medium-rise steel and reinforced concrete framed buildings and different ductility requirements. The results point out that the cyclic engagement of the damper is primarily affected by the fundamental period of the braced building and the design spectrum, and that, depending on these parameters, the actual number of cycles can be substantially smaller or larger that recommended by the standards. A more refined criterion for establishing the number of cycles to be implemented in testing protocols is eventually formulated.

show abstract

Section: Case-study Framesmentioning

confidence: 99%

Cyclic engagement of hysteretic steel dampers in braced buildings: a parametric investigation

Gandelli

Domenico

Quaglini

2021

Bull Earthquake Eng

View full text Add to dashboard Cite

show abstract

“…Previous studies by the authors demonstrated that the fracture behavior of foamed concrete is markedly affected by the curing conditions [18], [19], especially at the lower densities. Another interesting aspect concerns the development of enhanced variant of lightweight concretes that incorporate by-products or slags such as electric arc furnace slag [20]- [22] or foundry slag [23], which has motivated the present research work. This paper aims to extend the knowledge on the mechanical characteristics and the fracture behavior of foamed concrete when slags are introduced in the mix design as micro-aggregates.…”

Section: Introductionmentioning

confidence: 99%

Influence of biochar additions on the fracture behavior of foamed concrete

Falliano

Domenico

Sciarrone

et al. 2019

Frattura Ed Integrità Strutturale

View full text Add to dashboard Cite

The present study concerns the experimental investigation of foamed concretes with 1600 kg/m 3 density that incorporate biochar additions in the mix. A series of small notched beams are prepared to determine the fracture energy in CMOD (crack mouth opening displacement) mode and the mechanical properties in terms of flexural and compressive strength. Besides the evaluation of such properties for classical foamed concrete, the influence of the addition of biochar in the lightweight cementitious paste is comparatively investigated. Two different concentrations of biochar are analyzed, namely 2% and 4% of the cement weight, and two different curing conditions are studied, namely in air and in water at controlled temperature for 28 days. The results demonstrate that better fracture behavior are obtained with 2% biochar and air curing conditions. The biochar additions in moderate concentrations (e.g. 2%) seems to make the fracture surface more tortuous, thus justifying the numerical outcomes, and does not impair the flexural strength. Further microstructural investigation is underway to confirm the experimental observations. This research paves the way for a promising construction material that is more environmentally friendly and sustainable than traditional materials used in the building industry.

show abstract

“…3. The RC frames correspond to three residential RC buildings (Faleschini et Al., 2019). The frames, comprising 3-, 6-and 9-storey buildings, were designed according to the Italian Building Code (CSLLPP, 2018) for a low seismicity zone (475-yr return period PGA = 0.195g, soil type B) corresponding to the municipality of Pordenone, Italy.…”

Section: Case-study Framesmentioning

confidence: 99%

Parametric investigation of the cyclic response of hysteretic steel dampers in braced buildings

Gandelli¹,

Domenico²,

Quaglini³

2021

Preprint

View full text Add to dashboard Cite

Hysteretic steel dampers have been effectively used to improve the seismic performance of framed buildings by confining the dissipation of seismic energy into sacrifical, replaceable devices which are not part of the gravity framing system. The number of cycles sustained by the dampers during the earthquake is a primary design parameter, since it can be associated to low-cycle fatigue, with ensuing degradation of the mechanical properties and potential failure of the system. Current standards, like e.g. the European code EN 15129, indeed prescribe, for the initial qualification and the production control of hysteretic steel dampers, cyclic tests in which the devices are assessed over ten cycles with amplitude equal to the seismic design displacement dbd. This paper presents a parametric study focused on the number of effective cycles of the damper during a design earthquake in order to assess the reliability of the testing procedure proposed by the standards. The study considers typical applications of hysteretic steel dampers in low- and medium rise steel and reinforced concrete framed buildings and different ductility requirements. The results point out that the cyclic engagement of the damper is primarily affected by the fundamental period of the braced building and the design spectrum, and that, depending on these parameters, the actual number of cycles can be substantially smaller or larger that that recommended by the standards. A more refined criterion for establishing the number of cycles to be implemented in testing protocols is eventually formulated.

show abstract

Seismic reliability assessment of code-conforming reinforced concrete buildings made with electric arc furnace slag aggregates

Cited by 32 publications

References 34 publications

Cyclic engagement of hysteretic steel dampers in braced buildings: a parametric investigation

Cyclic engagement of hysteretic steel dampers in braced buildings: a parametric investigation

Influence of biochar additions on the fracture behavior of foamed concrete

Parametric investigation of the cyclic response of hysteretic steel dampers in braced buildings

Contact Info

Product

Resources

About