Improving seismic performance of deficient reinforced concrete columns using carbon fiber-reinforced polymers

Date

2008-06-01

Author

ÖZCAN, OKAN
Binici, Barış
Ozcebe, Guney

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

339
views

0
downloads

Reinforced concrete columns lacking transverse reinforcing steel do not possess necessary ductility to dissipate seismic energy during a major earthquake. The study reported herein investigates the use of carbon fiber-reinforced polymer (CFRP) wrapping as a method of retrofitting nonductile square reinforced concrete columns with low strength concrete and plain bars. Five specimens representative of transverse steel deficient flexure dominated columns in existing buildings were tested under lateral cyclic displacement excursions and constant axial load. The main parameters under investigation were the number of layers of CFRP wrap and presence and absence of the axial load on the column during strengthening. It was found that upon CFRP retrofit, deficient columns were able to withstand larger deformation demands without strength degradation. The test results were also compared with the results obtained from the analytical study that was conducted using a simple plastic hinge model considering the effects of FRP confinement and slip of plain bars. A good agreement between analytical and experimental results was observed. (c) 2007 Elsevier Ltd. All fights reserved.

Subject Keywords

Civil and Structural Engineering

URI

https://hdl.handle.net/11511/40854

Journal

ENGINEERING STRUCTURES

DOI

https://doi.org/10.1016/j.engstruct.2007.10.013

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Improving ductility and shear capacity of reinforced concrete columns with carbon fiber reinforced polymer Özcan, Okan; Özcebe, Güney; Department of Civil Engineering (2009) The performance of reinforced concrete (RC) columns during recent earthquakes has clearly demonstrated the possible failures associated with inadequate confining reinforcement. The confinement reinforcement requirements of older codes were less stringent than present standards. Many studies were conducted by applying different retrofitting techniques for RC columns that have inadequate confinement reinforcement. A new retrofitting technique by means of Carbon Fiber Reinforced Polymer (CFRP) was developed an...
The effect of shape memory alloys on the ductility of exterior reinforced concrete beam-column joints using the damage plasticity model Halahla, Abdulsamee M.; Abu Tahnat, Yazan B.; Almasri, Amin H.; Voyiadjis, George Z. (Elsevier BV, 2019-12-01) Using shape memory alloys (SMA) bars can significantly enhance the ductility of exterior reinforced concrete joints, where they can replace the conventional steel reinforcement. This research focuses on studying the effect of using SMA on the ductility capacity of exterior reinforced concrete beam-column joints at different column axial load levels. Finite element analysis was carried out and compared with the experimental results from the literature for verification purposes, and both were compared with th...
Development and analytical verification of an inelastic reinforced concrete joint model Unal, Mehmet; Burak Bakır, Burcu (Elsevier BV, 2013-07-01) Previous experimental research indicated that beam-to-column connections of reinforced concrete (RC) moment resisting frame structures experience considerable deformations under earthquake loading and these deformations have a major contribution to the story drift of the building. In current analysis and design applications, however, the connection regions are generally modeled as rigid zones and the inelastic behavior of the joint is not considered. This assumption gives rise to an underestimation of the s...
A comparative assessment of an existing reinforced concrete building by using different seismic rehabilitation codes and procedures Öztürk, İsmail; Sucuoğlu, Haluk; Department of Civil Engineering (2006) Lateral load carrying capacities of reinforced concrete structures which are designed by considering only gravity loads or according to outdated earthquake codes can be insufficient. The most important problem for these buildings is the limited ductility of the frame elements. How to evaluate the performance of an existing structure and to what level to strengthen it had been major concerns for structural engineers. Recent earthquakes which occurred in the Marmara Region in the last decade have increased th...
An approximate procedure for estimating the member demands in mid-rise reinforced concrete buildings Akpinar, Ugur; Binici, Barış; Yakut, Ahmet; Tuncay, Kağan (Springer Science and Business Media LLC, 2020-01-01) Seismic assessment of mid-rise reinforced concrete buildings is important for urban seismic risk reduction. Nonlinear time history analysis is the state-of-the-art analysis tool for this purpose. However, the number of such buildings may reach to several tens of thousands in metropolitan cities of earthquake prone countries. This necessitates faster yet sufficiently accurate assessment methods to mitigate the seismic risk. In this study, a simple and efficient approach is developed and validated for the ass...

Citation Formats

O. ÖZCAN, B. Binici, and G. Ozcebe, “Improving seismic performance of deficient reinforced concrete columns using carbon fiber-reinforced polymers,” ENGINEERING STRUCTURES, pp. 1632–1646, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40854.