Analysis of reinforced concrete columns retrofitted with fiber reinforced polymer lamina

Date

2007-01-01

Author

Binici, Barış

Metadata

Show full item record

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

Item Usage Stats

40
views

0
downloads

Fiber reinforced polymer (FRP) lamina have been used widely in the last decade to enhance strength and deformation capacity of deficient reinforced concrete (RC) columns. Seismic assessment and retrofit of existing columns in buildings and bridge piers necessitate accurate prediction of the available deformation capacity. In this study, a new analytical model is proposed to represent potential plastic hinge regions of RC columns prior to and after FRP retrofit. A recently developed variable confined concrete representation is employed within the framework of fiber-discretized frame elements to model the compression zone of the FRP-confined region. Confinement distribution within this region is included through the use of a bond model, whereas the effect of lap splices are considered using an effective steel strain concept. Comparisons of analytical estimates with experimentally measured response show that the proposed model is capable of capturing essential features of the response such as strength degradation due to lap splice slippage, and failure due to FRP rupture. Furthermore, a detailed sensitivity study is conducted to determine the parameters whose uncertainty significantly affects the behavior. It is observed that, in estimating the response of existing deficient columns, parameters such as plastic hinge length, concrete strength and splice length are important sources of uncertainty. While for FRP-retrofitted columns, parameters such as jacket stiffness, dilatation strain at splice failure and yield strength of the reinforcing bars are more important sources of uncertainty. (c) 2006 Published by Elsevier Ltd.

Subject Keywords

Polymer fiber, Stress transfer, Computational modeling, Statistical properties

URI

https://hdl.handle.net/11511/42122

Journal

COMPOSITES PART B-ENGINEERING

DOI

https://doi.org/10.1016/j.compositesb.2006.01.006

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Seismic strengthening of rectangular reinforced concrete columns using fiber reinforced polymers ÖZCAN, OKAN; Binici, Barış; Ozcebe, Guney (2010-04-01) In recent years, fiber-reinforced polymers have been widely utilized to improve the seismic performance of deficient RC columns. In this study, the flexural behavior of CFRP strengthened rectangular RC columns with plain bars and insufficient confining steel was investigated Five specimens, representing a typical deficient building column with poor transverse reinforcement detailing and low concrete strength, were tested under cyclic displacement excursions and constant axial load. The beneficial effect of ...
Determination of the Tensile Strength of Different Fiber Reinforced Concrete Mixtures Ardoğa, Mehmet Kemal; Alam, Burhan; Yaman, İsmail Özgür (null; 2016-09-21) Enhancing the tensile performance of concrete is the main advantage when fibers are added to this type of building materials. This improvement is usually measured through indirect methods like bending or split-tensile tests, in a way similar to normal concrete due to the absence of a standard tensile test for such purpose. Naturally, this type of tests does not determine the real tensile strength of the fiber reinforced concrete. Hence an important parameter, that is needed in modelling and designing proces...
Analysis of mechanical behavior of high performance cement based composite slabs under impact loading Satıoğlu, Azize Ceren; Gülkan, Polat; Department of Civil Engineering (2009) Studies on the behavior of steel fiber reinforced concrete (SFRC) and slurry infiltrated fibrous concrete (SIFCON) to impact loading have started in recent years. Using these relatively new materials, higher values of tensile and compressive strength can be obtained with greater fracture toughness and energy absorption capacity, and therefore they carry a considerable importance in the design of protective structures. In this thesis, computational analyses concerning impact loading effect on concrete, steel...
Behavior of CFRP confined concrete specimens under temperature cycles and sustained loads Erdil, Barış; Akyüz, Uğurhan; Yaman, İsmail Özgür; Department of Civil Engineering (2012) The application of carbon fiber reinforced polymers (CFRP) is one of the effective retrofitting and strengthening methods that is used worldwide and is starting to be used in Turkey as well because they have high strength and high modulus in the fiber direction, have very low coefficient of thermal expansion when compared to concrete and steel and are known not to corrode. Since FRPs are lightweight, their mass can be neglected when compared to concrete and steel. However, before proposing this material as ...
Determination of cracking related properties of engineering cementitious composites Keskin, Süleyman Bahadır; Şahmaran, Mustafa; Yaman, İsmail Özgür (null; 2017-09-12) Engineered Cementitious Composites (ECC) are relatively new types of fiber reinforced cementitious materials with enhanced mechanical properties such as tensile strain hardening accompanying high tensile strain capacity. This is mainly attributed to close and multiple cracks with widths remaining under 60 µm which contributes to durability of ECC material. These properties are only achievable as a result of a micro-mechanical design that requires special ingredients that make ECC costly to be used alone, ho...

Citation Formats

B. Binici, “Analysis of reinforced concrete columns retrofitted with fiber reinforced polymer lamina,” COMPOSITES PART B-ENGINEERING, pp. 265–276, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42122.