Finite element modeling of frp strengthened column subjected to cyclic loading

Scientific paper - Original scientific paper

• Author: Goran Chapragoski
• Author: Golubka Nechevska-Cvetanovska
• Author's institution: University of Zagreb; Faculty of Civil Engineering
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering

Abstract (english)

Existing reinforced concrete structures are subject to damage and performance degradation under
external loads. It is then necessary to improve their performance using appropriate strengthening
techniques. Over the last decades, new construction materials for strengthening and design have
emerged. These are referred to as fiber- reinforced polymer (FRP) composites and have unique
mechanical and in-service properties.
Investigation of FRP-strengthened RC members subjected to impact loads is warranted. In
addition, there is also a lack of finite element (FE) studies concerning this topic. FE analysis is
a powerful and economical tool to investigate the response of structures under various loads
and examine virtually endless number of variables that would be otherwise very difficult to be
performed experimentally, due time, cost, and laboratory limitations.
The existing RC column was strengthened with CFRP sheets, installed at the site where plastic
hinge may occur. First of all, three-dimensional FE CFRP confined column was designed. Due to
the complexity of the strengthened element, every element with different material characteristics
was designed separately. Every element has different meshing. The nonlinear behavior of the
concrete and steel material is accounted in the modeling by introducing the actual inelastic
properties in the model. The boundary conditions between the concrete and CFRP material also
were taken into account. At the end, the strengthened column was subjected to cyclic loading.
As a result of the FE analysis, hysteresis loop was obtained. In order to see the benefits of
strengthening with CFRP materials using FE analysis, comparison between hysteresis loops for
strengthened and unstrengthen column was performed.

• Keywords (english): Repair and strengthening, CFRP, Finite element, cyclic loading
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Unknown
• Publication version: Published version
• Publication title: 1st Croatian Conference on Earthquake Engineering 1CroCEE
• Numbering: pp. 443-448
• p-ISSN: 3043-8071
• DOI: https://doi.org/10.5592/CO/1CroCEE.2021.15
• URN:NBN: urn:nbn:hr:237:205265
• Publication: 2021-03
• Conference: Title: st Croatian Conference on Earthquake Engineering; Location: Zagreb, Croatia; Start date: 2021-03-22; End date: 2021-03-24; Assembly type: Lecture
• Type of resource: Text
• Publisher: Sveučilište u Zagrebu Građevinski fakultet
• Access conditions: Open access
• Created on: 2024-09-02 09:04:27