Comparative behaviour analysis of fixed and base isolated RC building during seismic event

Scientific paper - Original scientific paper

• Author: Milovan Stanojev
• Author: Radomir Folić
• Author's institution: University of Zagreb; Faculty of Civil Engineering
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering

Abstract (english)

Every man-made structure induce more or less seismic energy through it’s foundations, but the
most of the human casualties happens in residential buildings. Unfortunately, although most
of the old houses and buildings are seismically vulnerable by default, many of the new design
structures also represent threat during seismic event to their residents. Conventional aseismic
standards imply the concept of increasing resistance capacity for all structural members, with
fixed support to the foundation. Modern, but not yet widely accepted aseismic approach is to apply
systems for base isolation, which can be active or passive. Both types can be used in residential
buildings, but the cheaper investment and easier maintenance provides initial advantages to
passive base isolation. This paper presents the results of nonlinear response of a multi-storey
reinforced concrete building imposed to seismic actions, which is modelled using ETABS software.
Comparative behaviour analysis has been established onto two separate models: one with the
fixed supports and the other with base isolation system incorporated into foundations. This
system consists of rubber isolators and energy dissipaters, and experimental data for their
nonlinear stiffness and yield strength are inputted into time-history analysis. The behaviour
of structural elements in plastic range is defined through performance-based seismic design.
Comparative diagrams of vibration modes, required reinforcement, frame displacement and
inter-story drifts are given as results of behaviour analysis. Also, obtained results are compared
with EC8 criteria, focusing on limit drifts in both models and their role in preventing and limiting
structural damage depending on desired structural performance.

• Keywords (english): behaviour analysis, nonlinear analysis, base isolation, frame building, inter-story drift
• 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. 1177-1186
• p-ISSN: 3043-8071
• DOI: https://doi.org/10.5592/CO/1CroCEE.2021.148
• URN:NBN: urn:nbn:hr:237:466668
• 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: 2024-08-30 09:49:34