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Full-scale cyclic tests on a stone masonry building to investigate the effectiveness of a one-side application of the composite reinforced mortar system
ID
Gattesco, Natalino
(
Author
),
ID
Rizzi, Emanuele
(
Author
),
ID
Boem, Ingrid
(
Author
),
ID
Facconi, Luca
(
Author
),
ID
Minelli, Fausto
(
Author
),
ID
Dudine, Allen
(
Author
),
ID
Gams, Matija
(
Author
)
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Abstract
The results of an experimental study on a full-scale, two-storey rubble stone masonry building, strengthened with a Composite Reinforced Mortar (CRM) system applied on the external face of the walls, are herein presented. The CRM system consisted of a mortar coating reinforced with Glass Fiber Reinforced Polymer (GFRP) mesh and injected steel transverse connectors, which connect the separated wythes of the masonry. The aim of the research is to investigate the effectiveness of this strengthening technique. The study concerns two cyclic experimental tests: the first was carried out on the unreinforced masonry building up to a damage level not far from the ultimate limit state. Then, the building was repaired, strengthened with the proposed technique, and tested again. The second test was carried out up to a near-collapse condition. This allowed to evaluate the effectiveness in terms of seismic performances provided by the reinforcement. The cyclic horizontal load, with increasing amplitude, was applied to each of the two longitudinal walls of the building by means of servo-controlled hydraulic jacks pinned to a vertical steel beam. This beam allowed the distribution of the total lateral force between the first floor and roof level, in the fundamental mode shape. The experiments proved the effectiveness of the proposed strengthening method: with respect to the unreinforced masonry building, the resistance increased by 2.4 times, the displacement capacity by 4 times and the total dissipated energy by about 7.2 times. These benefits were due to the GFRP mesh reinforced coating’s capability to prevent the formation of isolated thick cracks, instead promoting a wider dispersion of many closely spaced thin cracks. Moreover, the importance of transverse connectors in preventing the separation of the masonry leaves in the strengthened walls was also clearly observed.
Language:
English
Keywords:
civil engineering
,
composites
,
glass fiber
,
structural rehabilitation
,
masonry structures
,
earthquake engineering
,
full-scale experimental test
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FGG - Faculty of Civil and Geodetic Engineering
Publication status:
Published
Publication version:
Author Accepted Manuscript
Year:
2023
Number of pages:
Str. 1-17
Numbering:
Vol. 296, art. 116967
PID:
20.500.12556/RUL-151985
UDC:
624.07
ISSN on article:
1873-7323
DOI:
10.1016/j.engstruct.2023.116967
COBISS.SI-ID:
166654467
Publication date in RUL:
26.10.2023
Views:
332
Downloads:
43
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Record is a part of a journal
Title:
Engineering structures
Publisher:
Elsevier
ISSN:
1873-7323
COBISS.SI-ID:
23165701
Licences
License:
CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:
http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:
The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Secondary language
Language:
Slovenian
Keywords:
gradbeništvo
,
kompoziti
,
steklena vlakna
,
utrjevanje stavb
,
zidane stavbe
,
potresno inženirstvo
,
testi v naravni velikosti
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