Numerical Modelling of Energy Dissipative Steel Cushions

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

doi:10.1007/s13296-019-00213-7

Numerical Modelling of Energy Dissipative Steel Cushions

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

^*Corresponding author for this work

Department of Civil Engineering

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

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 language	English
Pages (from-to)	1331-1341
Number of pages	11
Journal	International Journal of Steel Structures
Volume	19
Issue number	4
DOIs	https://doi.org/10.1007/s13296-019-00213-7
Publication status	Published - 6 Aug 2019

Bibliographical note

Publisher Copyright:
© 2019, Korean Society of Steel Construction.

Funding

This research was conducted under the framework of the FP7 Project “SAFECLADDING: “Improved Fastening Systems of Cladding Wall Panels of Precast Buildings in Seismic Zones”, Research for SME Associations, Grant Agreement Number 314122, which was coordinated by Dr. Alessio Rinoldi from BIBM, Belgium. The financial support provided by the Commission of the European Communities through this Project is greatly appreciated. The experimental study was conducted at the Structural and Earthquake Engineering Laboratory of Istanbul Technical University (STEELab). The support from laboratory staff and graduate students is gratefully acknowledged. This research was conducted under the framework of the FP7 Project “SAFECLADDING: “Improved Fastening Systems of Cladding Wall Panels of Precast Buildings in Seismic Zones”, Research for SME Associations, Grant Agreement Number 314122, which was coordinated by Dr. Alessio Rinoldi from BIBM, Belgium. The financial support provided by the Commission of the European Communities through this Project is greatly appreciated. The experimental study was conducted at the Structural and Earthquake Engineering Laboratory of Istanbul Technical University (STEELab). The support from laboratory staff and graduate students is gratefully acknowledged.

Funders	Funder number
BIBM
Commission of the European Communities
FP7 Research for the Benefit of SMEs
Seventh Framework Programme	314122

Keywords

Flexural frame element
Numerical modeling
Shell element
Steel cushion
Zero-length nonlinear link element

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10.1007/s13296-019-00213-7

Cite this

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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.",

keywords = "Flexural frame element, Numerical modeling, Shell element, Steel cushion, Zero-length nonlinear link element",

author = "Ahmet Gullu and Eleni Smyrou and Arastoo Khajehdehi and Hasan Ozkaynak and Bal, {I. Engin} and Ercan Yuksel and Faruk Karadogan",

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doi = "10.1007/s13296-019-00213-7",

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AU - Gullu, Ahmet

AU - Smyrou, Eleni

AU - Khajehdehi, Arastoo

AU - Ozkaynak, Hasan

AU - Bal, I. Engin

AU - Yuksel, Ercan

AU - Karadogan, Faruk

PY - 2019/8/6

Y1 - 2019/8/6

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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Numerical Modelling of Energy Dissipative Steel Cushions

Abstract

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Keywords

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