Abstract
Historic buildings have a high architectural value and their maintenance, repair and rehabilitation require a special approach. This approach is mainly based on the buildings’ performance under non-destructive tests such as operational modal analysis (OMA). Under extreme loads, such as earthquakes, these buildings require representative numerical models to simulate their expected response. In historic buildings, tie rods transfer axial loads and are typically used to balance horizontal trust due to static and dynamic loads associated with seismic actions. It is very important to determine the possibility of exceeding their load-bearing capacity under extreme loads, such as an earthquake. In this context, this paper presents an approach for the analysis of seismic action on the tie rod system in a historic building. The analysis was performed by combining the on-site experimental testing and the finite element model updating (FEMU) of the local models of tie rods and the global model of the structure. It was shown that the combination of analyzing local and global structural models, experimental on-site testing and FEMU is a viable solution for assessment of historic buildings’ load bearing capacity.
Highlights
The use of stone or masonry elements in buildings is one of the oldest methods still in use today
We extend our previous work by performing the operational modal analysis of the cathedral (Figure 3) to determine the mode shapes of the entire structure, that we used to validate the ffiinite element (FE) model and to update the finite element model
This research presents the method for the analysis of the possibility of exceeding the load bearing capacity of tie rods in a historic building
Summary
The use of stone or masonry elements in buildings is one of the oldest methods still in use today. Asonry elastSuiicpnidctyeattmihnegor.edAwufletureesrfatehwnedsientlhietcieatelbdsotuuaptneddaoatfirntyhgecpotairneadrmoiteditsoernwss,atwsheoebFrtEeaMisneUeldew,cataesndpdeatrhsfoetrhmgeleodmbawol idnthuelmmueaprniudcaaallting paramemteordse.l Soifnthcee ctahtehreedrwalewreasfeuwpdsaeteledc, taendaunapldysaitsionfgthpeairnatmerneatel rfos,rctehseanFdEMstrUesswesalsevpeelsrformed withinmthaentuiealroudpsdcaautisnegd.bAyfttheercthhaeraicntietriiaslticsstaotfethoef stehiesmtiiec arcotdiosnwfoarsthoebŠtiabienneidk,aarenadwtahse global numerical model of the cathedral was updated, an analysis of the internal forces and stresses levels in the tie rods caused by the characteristics of the seismic action for the Šibenik area was performed. On this basis, it was determined whether the tie rods will reach their maximum load-bearing capacity during an earthquake. JJaammeess CCaatthheeddrraall iinn ŠŠiibbeenniikk ((rreedd aanndd ggrreeeenn lliinneess iinnddiiccaattee tthhee ddoommiinnaanntt nnaattuurraall ffrreeqquueenncciieess aassssoocciiaatteedd wwiitthh mmooddee sshhaappeess pprreesseenntt oonn FFiigguurree 55)..)
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