Details
| Original language | English |
|---|---|
| Pages (from-to) | 2457-2482 |
| Number of pages | 26 |
| Journal | Bulletin of Earthquake Engineering |
| Volume | 19 |
| Issue number | 6 |
| Early online date | 25 Mar 2021 |
| Publication status | Published - Apr 2021 |
Abstract
The collapse risk of building structures has been one of the major factors causing casualties and huge economic losses for earthquake disaster prevention. This paper presents a shaking table test on low-rise steel moment frames with consideration of mass irregularity in the elevation direction. The frames are subjected to naturally observed and artificial seismic waves. As indicated from the test results, the specimen with the irregularity of additive-mass (additional 5% of the roof mass) on the top floor showed considerable amplification on the acceleration and drift responses at the bottom storey when subjected to over-design earthquakes. A numerical model with degraded stress–strain relation is built in terms of fiber elements and calibrated by test results. Incremental dynamic analyses are performed to evaluate the probabilities exceeding three limit states related to immediate occupancy, life safety, and collapse prevention. The seismic fragility curves through a suite of near-fault ground motions in the Uemachi area of Osaka are obtained for the numerical models with and without mass irregularity on the roof, and the vertical mass irregularity tends to play significant roles in the seismic design for collapse prevention.
Keywords
- Additive mass, Seismic collapse, Shaking table test, Steel moment frame, Strength degradation, Uncertainty quantification
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Building and Construction
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
- Earth and Planetary Sciences(all)
- Geophysics
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In: Bulletin of Earthquake Engineering, Vol. 19, No. 6, 04.2021, p. 2457-2482.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Seismic collapse fragility of low-rise steel moment frames with mass irregularity based on shaking table test
AU - Bai, Yongtao
AU - Li, Yinsheng
AU - Tang, Zhenyun
AU - Bittner, Marius
AU - Broggi, Matteo
AU - Beer, Michael
N1 - Funding Information: This study is partially supported by the Scientific Research Fund of Institute of Engineering Mechanics, China Earthquake Administration (Grant No. 2020EEEVL0413); the Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology (Grant No. 2021B04); the Fundamental Research Funds for the Central Universities (2020CDJQY-A063), and the Alexander von Humboldt Stiftung-Foundation (1196752).
PY - 2021/4
Y1 - 2021/4
N2 - The collapse risk of building structures has been one of the major factors causing casualties and huge economic losses for earthquake disaster prevention. This paper presents a shaking table test on low-rise steel moment frames with consideration of mass irregularity in the elevation direction. The frames are subjected to naturally observed and artificial seismic waves. As indicated from the test results, the specimen with the irregularity of additive-mass (additional 5% of the roof mass) on the top floor showed considerable amplification on the acceleration and drift responses at the bottom storey when subjected to over-design earthquakes. A numerical model with degraded stress–strain relation is built in terms of fiber elements and calibrated by test results. Incremental dynamic analyses are performed to evaluate the probabilities exceeding three limit states related to immediate occupancy, life safety, and collapse prevention. The seismic fragility curves through a suite of near-fault ground motions in the Uemachi area of Osaka are obtained for the numerical models with and without mass irregularity on the roof, and the vertical mass irregularity tends to play significant roles in the seismic design for collapse prevention.
AB - The collapse risk of building structures has been one of the major factors causing casualties and huge economic losses for earthquake disaster prevention. This paper presents a shaking table test on low-rise steel moment frames with consideration of mass irregularity in the elevation direction. The frames are subjected to naturally observed and artificial seismic waves. As indicated from the test results, the specimen with the irregularity of additive-mass (additional 5% of the roof mass) on the top floor showed considerable amplification on the acceleration and drift responses at the bottom storey when subjected to over-design earthquakes. A numerical model with degraded stress–strain relation is built in terms of fiber elements and calibrated by test results. Incremental dynamic analyses are performed to evaluate the probabilities exceeding three limit states related to immediate occupancy, life safety, and collapse prevention. The seismic fragility curves through a suite of near-fault ground motions in the Uemachi area of Osaka are obtained for the numerical models with and without mass irregularity on the roof, and the vertical mass irregularity tends to play significant roles in the seismic design for collapse prevention.
KW - Additive mass
KW - Seismic collapse
KW - Shaking table test
KW - Steel moment frame
KW - Strength degradation
KW - Uncertainty quantification
UR - http://www.scopus.com/inward/record.url?scp=85103291311&partnerID=8YFLogxK
U2 - 10.1007/s10518-021-01076-2
DO - 10.1007/s10518-021-01076-2
M3 - Article
AN - SCOPUS:85103291311
VL - 19
SP - 2457
EP - 2482
JO - Bulletin of Earthquake Engineering
JF - Bulletin of Earthquake Engineering
SN - 1570-761X
IS - 6
ER -