Comparative study of the seismic demand estimation on acceleration-sensitive nonstructural elements

Scientific paper - Original scientific paper

• Author: Wilson Carofilis
• Author: Bryan Chalarca
• Author's institution: University of Zagreb; Faculty of Civil Engineering
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering

Abstract (english)

The latest middle and high intensity seismic events have demonstrated that the potential seismic
risk of nonstructural elements compromises a building’s overall seismic performance, affecting
especially the building operability. Additionally, nonstructural elements account for a considerably
large fraction of the total earthquake economic losses and total building costs. Several
international building codes provide methods to approximate the seismic acceleration demand
on nonstructural elements; however, the provided guidelines may not accurately estimate the
actual seismic demand leading to unconservative designs of acceleration-sensitive nonstructural
elements. This study compares the acceleration demand on nonstructural elements calculated
by using international building codes and state-of-the-art estimation methodologies with actual
floor acceleration response spectra from nonlinear time history analysis. Two moment-resisting
steel frames of three and nine stories were selected as case-study buildings. The FEMA P-695
far-field ground motion set was scaled to an equivalent design intensity and it was used as the
input seismic load. The floor absolute accelerations were recorded on the first and last stories
of both buildings and the median floor absolute acceleration response spectra were calculated.
The spectral floor accelerations were determined considering a wide range of nonstructural
periods and the results were compared with the estimated floor spectral acceleration obtained
from the building code provisions and the novel methodologies. The results point out that
current building codes tend to mislead the design of nonstructural elements by underestimating
the actual acceleration demand on these components. On the other hand, the state-of-the-art
methodologies provide a better estimation of the acceleration demand on nonstructural elements
without the need for conducting nonlinear time history analyses.

• Keywords (english): nonstructural elements, floor acceleration, seismic performance, seismic demand, spectral acceleration
• 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. 1313-1322
• p-ISSN: 3043-8071
• DOI: https://doi.org/10.5592/CO/1CroCEE.2021.192
• URN:NBN: urn:nbn:hr:237:800416
• 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 09:52:48