Experimental response of a substandard RC frame building retrofitted with GFRP sheets and slab-weakening subjected to earthquake motions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00361231" target="_blank" >RIV/68407700:21110/23:00361231 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1007/s10518-022-01560-3" target="_blank" >https://doi.org/10.1007/s10518-022-01560-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10518-022-01560-3" target="_blank" >10.1007/s10518-022-01560-3</a>

Result language

angličtina

Original language name

Experimental response of a substandard RC frame building retrofitted with GFRP sheets and slab-weakening subjected to earthquake motions

Original language description

This paper presents an experimental study on the seismic response of a 2/5 scale, 3-storey, 2-bays non-ductile reinforced concrete frame building retrofitted with glass fibre reinforced polymer sheets and weakening of the floor slab around the strengthened beam hinge region, following a partial retrofit strategy involving an upgrade of the exterior beam column (b-c) joints only. The research comprised two uni-directional shake-table experiments, including a different earthquake record each, with similar PGA, but different duration and frequency content. During the short-duration test, the specimen experienced limited inter-storey drift ratios (less than 0.6%) and presented no visible damage. During the long-duration test, instead, the specimen undertook large inter-storey drifts ratios, particularly in the first storey (3.7%), and showed large cracking in the exterior beams and crushing of the concrete at both ends of the central columns. An analysis of the spectrograms of the input and top-storey displacement motions shows that the large-amplitude response of the specimen during the long-duration test was apparently due to resonance. It was concluded that the proposed retrofit strategy was able to attain, under an adverse scenario with large inter-storey drift demands, the fundamental objectives of: (a) inverting the hierarchy of strengths and sequence of events in the critically vulnerable exterior b-c joints, relocating the damage from the panel zone into the beams at the weakened part of the slab; and (b) improving the global inelastic mechanism of the structure by shifting it from brittle/unstable to ductile/stable.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20101 - Civil engineering

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Bulletin of Earthquake Engineering

ISSN

1570-761X

e-ISSN

1573-1456

Volume of the periodical

21

Issue of the periodical within the volume

2

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

33

Pages from-to

893-925

UT code for WoS article

000884946700001

EID of the result in the Scopus database

2-s2.0-85142196988