Natalino Gattesco (Avtor), Emanuele Rizzi (Avtor), Ingrid Boem (Avtor), Luca Facconi (Avtor), Fausto Minelli (Avtor), Allen Dudine (Avtor), Matija Gams (Avtor)

Povzetek

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.

Ključne besede

gradbeništvo;kompoziti;steklena vlakna;utrjevanje stavb;zidane stavbe;potresno inženirstvo;testi v naravni velikosti;civil engineering;composites;glass fiber;structural rehabilitation;masonry structures;earthquake engineering;full-scale experimental test;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FGG - Fakulteta za gradbeništvo in geodezijo
UDK: 624.07
COBISS: 166654467 Povezava se bo odprla v novem oknu
ISSN: 1873-7323
Št. ogledov: 13
Št. prenosov: 1
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarni naslov: Ciklični testi kamnite stavbe v naravni velikosti za raziskavo učinkovitosti enostranske maltne obloge
Sekundarne ključne besede: gradbeništvo;kompoziti;steklena vlakna;utrjevanje stavb;zidane stavbe;potresno inženirstvo;testi v naravni velikosti;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-17
Letnik: ǂVol. ǂ296
Zvezek: [article no.] 116967
Čas izdaje: 2023
DOI: 10.1016/j.engstruct.2023.116967
ID: 20488471