Numerical modelling of energy dissipative steel cushions

Ahmet Gullu, Eleni Smyrou, Arastoo Khajehdehi, Hasan Ozkaynak, I. Engin Bal, Ercan Yuksel, Faruk Karadogan

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Energy dissipative steel cushions (EDSCs) are simple units that can be used to join structural members. They can absorb a substantial amount of seismic energy due to their geometric shapes and the ductile behavior of mild steel. Large deformation capability and stable hysteretic behavior were obtained in monotonic and cyclic tests of EDSCs in the framework of the SAFECLADDING project. Discrete numerical modeling strategies were applied to reproduce the experimental results. The first and second models comprise two-dimensional shell elements and one-dimensional flexural frame elements, respectively. The uncertain points in the preparation of the models included the mesh density, representation of the material properties, and interaction between contacting surfaces. A zero-length nonlinear link element was used in the third attempt in the numerical modeling. Parameters are recommended for the Ramberg–Osgood and bilinear models. The obtained results indicate that all of the numerical models can reproduce the response, and the stiffness, strength, and unloading and reloading curves were fitted accurately.
Original languageEnglish
Pages (from-to)1331-1341
JournalInternational journal of steel structures
Volume19
Issue number4
DOIs
Publication statusPublished - 7 Feb 2019

Keywords

  • building construction
  • earthquakes

Cite this

Gullu, Ahmet ; Smyrou, Eleni ; Khajehdehi, Arastoo ; Ozkaynak, Hasan ; Bal, I. Engin ; Yuksel, Ercan ; Karadogan, Faruk. / Numerical modelling of energy dissipative steel cushions. In: International journal of steel structures. 2019 ; Vol. 19, No. 4. pp. 1331-1341.
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title = "Numerical modelling of energy dissipative steel cushions",
abstract = "Energy dissipative steel cushions (EDSCs) are simple units that can be used to join structural members. They can absorb a substantial amount of seismic energy due to their geometric shapes and the ductile behavior of mild steel. Large deformation capability and stable hysteretic behavior were obtained in monotonic and cyclic tests of EDSCs in the framework of the SAFECLADDING project. Discrete numerical modeling strategies were applied to reproduce the experimental results. The first and second models comprise two-dimensional shell elements and one-dimensional flexural frame elements, respectively. The uncertain points in the preparation of the models included the mesh density, representation of the material properties, and interaction between contacting surfaces. A zero-length nonlinear link element was used in the third attempt in the numerical modeling. Parameters are recommended for the Ramberg–Osgood and bilinear models. The obtained results indicate that all of the numerical models can reproduce the response, and the stiffness, strength, and unloading and reloading curves were fitted accurately.",
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Numerical modelling of energy dissipative steel cushions. / Gullu, Ahmet; Smyrou, Eleni; Khajehdehi, Arastoo; Ozkaynak, Hasan; Bal, I. Engin; Yuksel, Ercan; Karadogan, Faruk.

In: International journal of steel structures, Vol. 19, No. 4, 07.02.2019, p. 1331-1341.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Numerical modelling of energy dissipative steel cushions

AU - Gullu, Ahmet

AU - Smyrou, Eleni

AU - Khajehdehi, Arastoo

AU - Ozkaynak, Hasan

AU - Bal, I. Engin

AU - Yuksel, Ercan

AU - Karadogan, Faruk

PY - 2019/2/7

Y1 - 2019/2/7

N2 - Energy dissipative steel cushions (EDSCs) are simple units that can be used to join structural members. They can absorb a substantial amount of seismic energy due to their geometric shapes and the ductile behavior of mild steel. Large deformation capability and stable hysteretic behavior were obtained in monotonic and cyclic tests of EDSCs in the framework of the SAFECLADDING project. Discrete numerical modeling strategies were applied to reproduce the experimental results. The first and second models comprise two-dimensional shell elements and one-dimensional flexural frame elements, respectively. The uncertain points in the preparation of the models included the mesh density, representation of the material properties, and interaction between contacting surfaces. A zero-length nonlinear link element was used in the third attempt in the numerical modeling. Parameters are recommended for the Ramberg–Osgood and bilinear models. The obtained results indicate that all of the numerical models can reproduce the response, and the stiffness, strength, and unloading and reloading curves were fitted accurately.

AB - Energy dissipative steel cushions (EDSCs) are simple units that can be used to join structural members. They can absorb a substantial amount of seismic energy due to their geometric shapes and the ductile behavior of mild steel. Large deformation capability and stable hysteretic behavior were obtained in monotonic and cyclic tests of EDSCs in the framework of the SAFECLADDING project. Discrete numerical modeling strategies were applied to reproduce the experimental results. The first and second models comprise two-dimensional shell elements and one-dimensional flexural frame elements, respectively. The uncertain points in the preparation of the models included the mesh density, representation of the material properties, and interaction between contacting surfaces. A zero-length nonlinear link element was used in the third attempt in the numerical modeling. Parameters are recommended for the Ramberg–Osgood and bilinear models. The obtained results indicate that all of the numerical models can reproduce the response, and the stiffness, strength, and unloading and reloading curves were fitted accurately.

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