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Seismic design and performance assessment of frame buildings reinforced by dual-phase steel
ID Žižmond, Jure (Author), ID Dolšek, Matjaž (Author)

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Abstract
To improve the durability and serviceability of reinforced concrete structures, different variants of dual-phase reinforcing steel were developed within the research project NEWREBAR. The investigated variant of the new material, termed DPD2 steel, has a specific microstructure that increases the corrosion resistance, but its yielding strength is less than that of Tempcore steel B500B. DPD2 steel has no yielding plateau, which is characteristic of conventional reinforcing steel. Thus, it was investigated whether the current building codes can be used to design earthquake-resistant concrete structures reinforced by DPD2 steel bars. For this reason, three multi-story reinforced concrete frame buildings were designed according to Eurocode by considering DPD2 steel and, for comparison reasons, Tempcore steel B500B. Based on the nonlinear model, which was validated by cyclic test of columns, the seismic performance of DPD2 buildings was found to be improved compared to those designed with conventional B500B reinforcing steel. This can mainly be attributed to the substantial strain hardening of the DPD2 steel, which increases the overstrength factor of the structure by about 10%. However, for the improved seismic performance, the amount of steel in DPD2 buildings had to be increased in the design by approximately 20–25% due to the smaller yield strength of DPD2 steel. Nevertheless, it was demonstrated that Eurocode 8 could be used to design earthquake-resistant frame building reinforced with dual-phase reinforcing steel DPD2.

Language:English
Keywords:dual-phase reinforcing steel, earthquake-resistant design, Tempcore reinforcing steel, reinforced concrete frames, seismic analysis, pushover analysis
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FGG - Faculty of Civil and Geodetic Engineering
Publication status:Published
Publication version:Version of Record
Year:2021
Number of pages:24 str.
Numbering:Vol. 11, iss. 11, art. 4998
PID:20.500.12556/RUL-127294 This link opens in a new window
UDC:624
ISSN on article:2076-3417
DOI:doi.org/10.3390/app11114998 This link opens in a new window
COBISS.SI-ID:65160707 This link opens in a new window
Publication date in RUL:02.06.2021
Views:680
Downloads:210
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Record is a part of a journal

Title:Applied sciences
Shortened title:Appl. sci.
Publisher:MDPI
ISSN:2076-3417
COBISS.SI-ID:522979353 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:01.06.2021

Secondary language

Language:Slovenian
Keywords:dual-phase armaturno jeklo, potresnoodporno projektiranje, Tempcore armaturno jeklo, armiranobetonske okvirne stavbe, seizmična analiza, potisna analiza

Projects

Funder:EC - European Commission
Funding programme:Research Fund for Coal and Steel
Project number:RFSR-CT-2015-00023

Funder:ARRS - Slovenian Research Agency
Project number:P2-0185
Name:Potresno inženirstvo

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