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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Bulletin of Earthquake Engineering

ISSN

1570-761X

e-ISSN

1573-1456

Svazek periodika

21

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

33

Strana od-do

893-925

Kód UT WoS článku

000884946700001

EID výsledku v databázi Scopus

2-s2.0-85142196988