magistrsko delo št.: 221/II. GR
Mario Farič (Author), Matija Gams (Mentor)

Abstract

V nalogi smo raziskovali potresno obnašanje prekladnega dela kamnitega zidu ter preučevali učinkovitost potresnega utrjevanja z ene strani. Vsebinsko je naloga sestavljena iz treh glavnih delovnih sklopov. V prvem sklopu smo za potrebe eksperimentalne preiskave sprojektirali in sestavili kompleksno preizkuševališče za prekladne dele zidov v naravni velikosti. V drugem delu smo na preizkuševališču preizkusili prekladni del kamnitega zidu v osnovnem in utrjenem stanju ter raziskovali izboljšanje potresnega odziva. Maltna obloga enostranske utrditve je bila debela približno 30 mm in armirana z mrežico iz steklenih vlaken (GFRP). Utrjeni zid je imel 2,8-krat večjo nosilnost in je dosegel največjo odpornost pri približno 33-krat večjem zamiku. Količina sipane energije se je povečala za približno 20-krat. Ključno vlogo za doseganje take učinkovitosti obloge so imela sidra. Uporabljeni sta bili dve vrsti posebnih sider, ki sta bili razviti ravno za ta namen. V tretjem sklopu smo analitično ocenjevali nosilnost preizkušenih zidov. Ugotovili smo, da ne obstaja veliko priporočil oziroma navodil za oceno odpornosti prekladnih delov in da so obstoječi modeli primerni predvsem za opečne zidove. Za oceno odpornosti smo zato smiselno prilagodili enega od obstoječih modelov. Ocenjena nosilnost neutrjenega prekladnega dela je bila podcenjena za približno 25 %, ocenjena nosilnost utrjenega prekladnega dela pa precenjena za dobrih 20 %.

Keywords

gradbeništvo;magistrska dela;GR;potresni odziv;kamniti zid;prekladni del zidu;enostranska utrditev;GFRP;eksperimentalna preiskava;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
Publisher: [M. Farič]
UDC: 624.042.7:692.2(497.4)(043.3)
COBISS: 96647683 Link will open in a new window
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Downloads: 134
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Other data

Secondary language: English
Secondary title: Seismic response of one side strengthened stone masonry spandrels
Secondary abstract: Seismic behaviour of stone masonry spandrels and one sided strengthening was investigated. The work was divided into three segments. In the first one a complex laboratory test setup for full scale masonry spandrels was designed and assembled. In the second part a stone masonry spandrel in reference and strengthened state was tested. The one sided mortar coating of strenghtened spandrel was about 30 mm thick and reinforced with glass fibre (GFRP) mesh. The strengthened wall had 2.8 times higher strength capacity and reached maximum resistance at about 33 times larger drift. The amount of dissipated energy was increased about 20 fold. The key for achieving such efficiency of strengthening was the use of two kinds of specially designed anchors. In the third segment, resistance of walls was estimated analytically. Because very few models exist in literature, and even those that exist are for brick, not stone masonry, no model could be used directly. Therefore an existing model was sensibly adjusted for the present case. The estimated resistance of a reference spandrel was underestimated by about 25 %, whereas the resistance of the strengthened spandrel was overestimated by about 20 %.
Secondary keywords: civil engineering;master thesis;seismic response;stone masonry;spandrel;one sided reinforcement;GFRP;experimental research;
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages: XXVI, 84 str., [12] str. pril.
ID: 14673446