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Quasi-Static And Pseudo-Dynamic Testing Of Infilled RC Frames Retrofitted With CFRP Material

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Author
Özkaynak, Hasan
Yüksel, Ercan
Büyüköztürk, Oral
Yalçın, Cem
Dindar, Ahmet Anıl
Type
Article
Date
2011-03
Language
en_US
Metadata
Show full item record
Abstract
The intact infill walls in reinforced concrete (RC) frames have beneficial effects to overall behavior in terms of stiffness, strength and energy dissipation in the event of seismic actions. The rationale of this paper is to increase effectiveness of the carbon fiber reinforced polymer (CFRP)-based retrofitting technique so that intact infill walls of vulnerable mid-rise RC buildings are transformed into a lateral load resisting system. The seismic behaviors of cross-braced and cross diamond-braced retrofitting schemes applied on infilled RC frames have been investigated experimentally. The research consisted of quasi-static (QS) tests where drift-based cyclic loading reversals were used and pseudo-dynamic (PsD) tests where acceleration intensity-based loading was used. Twelve 1/3-scaled RC frames were built and tested as bare and infilled control frames, and as cross-braced and cross diamond-braced retrofitted specimens. Significant findings were noted while comparing the QS and PsD tests. The maximum restoring force and drift couples that were obtained from PsD tests showed a close behavior pattern, regardless of the level of inertial masses, when compared with QS tests. The energy dissipation capacity of the specimens that was obtained from PsD test resulted somewhat less than the one tested with QS for the same level of damage. The performance of the retrofitted frames that was obtained from the experimental study was evaluated with code-specified performance limits. Accordingly, it was concluded that the cross diamond-bracing scheme is an effective retrofitting technique that brings the bare frame from collapse prevention (CP) to life safety (LS) performance levels. Finally, analytical predictions as per FEMA 356 guideline were performed and good agreement was obtained with experimental results. (C) 2010 Elsevier Ltd. All rights reserved.
Subject
carbon fiber
plastic deformation
strength
retrofitting
reinforced-concrete frames
masonry
walls
strips
karbon fiber
plastik bozulma
kuvvet
güçlendirme
betonarme çerçeve
duvarcılık
duvarlar
şeritler
URI
http://hdl.handle.net/11413/1440
Collections
  • Makaleler / Articles [122]
  • Scopus Publications [724]
  • WoS Publications [1016]

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İstanbul Kültür University

Hakkında |Politika | Kütüphane | İletişim | Send Feedback | Admin

Istanbul Kültür University, Ataköy Campus E5 Karayolu Üzeri Bakırköy 34158, İstanbul / TURKEY
Copyright © İstanbul Kültür University

Creative Commons Lisansı
IKU Institutional Repository, Creative Commons Alıntı-GayriTicari-Türetilemez 4.0 Uluslararası Lisansı ile lisanslanmıştır.

Designed by  UNIREPOS