Experimental and numerical assessment of reinforced concrete column under cyclic loading

Scientific paper - Original scientific paper

• Author: Eldin Kaloper
• Author: Edhem Živalj
• Author: Senad Medić
• Author's institution: University of Zagreb; Faculty of Civil Engineering
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering

Abstract (english)

In this paper a nonlinear finite element analysis of reinforced concrete frame elements exposed
to monotonic and cyclic loading is presented. The analysis was executed using 3D solid elements
in DIANA FEA and frame elements with localized nonlinearities in SAP 2000. The results were
verified against the experimental testing conducted at the Institute for Materials and Structures
of the Faculty of Civil Engineering University of Sarajevo. The static cyclic tests include nine
cantilever beams (20/20/200 cm) reinforced with the same longitudinal reinforcement and
different transverse confining reinforcement. Occurrence and development of cracks on the
beams were monitored and mapped during the experiments. Major cracks localize in the plastic
hinge whose length is roughly equal to cross-sectional height. This observation matches well
with the recommendations given in EC 8. The influence of the normal force according to the
first and second order theory, the percentage of longitudinal reinforcement, the arrangement
of stirrups on the load bearing capacity and ductility of the elements were analysed. Maekawa
- Fukuura constitutive model was assumed for concrete while embedded reinforcement was
simulated using von Mises, Menegotto - Pinto, Monti - Nuti and JSCE 2012 material models
depending on monotonic or cyclic loading protocol. The effect of simple and specially dedicated
reinforcement models capable of reproducing buckling or Bauschinger effect on the column
behaviour is significant. The influence of mesh density and iterative approach on crack localization
and crack width was investigated. The performance of smeared cracking approach and localized
nonlinearity concept was critically assessed.

• Keywords (english): Experimental testing, nonlinear FEA, RC column, smeared cracking, 3D solid, DIANA FEA, SAP2000
• 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. 1059-1066
• p-ISSN: 3043-8071
• DOI: https://doi.org/10.5592/CO/1CroCEE.2021.116
• URN:NBN: urn:nbn:hr:237:182718
• 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 08:50:20