1,721,049 research outputs found
Methods for the Assessment of Critical Properties in Existing Masonry Structures under Seismic Loads - The ARES Project
Full text linkMasonry structures are notoriously vulnerable to horizontal actions caused by earthquakes. Given the high seismicity of the European region, and that the European building stock comprises a lot of masonry buildings, knowledge about their structural response to seismic excitation is particularly important, but at the same time difficult to determine, due to the heterogenous nature of materials and/or constructional techniques in use. An additional issue is represented by the current methods for mechanical properties assessment, that do not provide a reliable framework for accurate structural estimations of existing buildings characterized by different typological properties. Every structure, in other words, should be separately inspected in regard to its mechanical behaviour, based on dedicated approaches able to capture potential critical issues. In this review paper, an insight on the Croatian ARES project is presented (Assessment and Rehabilitation of Existing Structures), including a state-of-the-art of the actual building stock and giving evidence of major difficulties concerning the assessment of existing structures. The most commonly used techniques and tools are compared, with a focus on their basic features and field of application. A brief overview of prevailing structural behaviours and Finite Element numerical modelling issues are also mentioned. As shown, the general tendency is to ensure “sustainable” and energy-efficient building systems. The latter, however, seem in disagreement with basic principles of structural maintenance and renovation. The aim of the ongoing ARES project, in this context, is to improve the current knowledge regarding the assessment and strengthening of structures, with a focus on a more reliable design and maintenance process for existing masonry building
Design of precast concrete building
No full textU ovom diplomskom radu napravljena je montažna armiranobetonska sportska hala. Model hale napravljen je u programskom paketu REVIT 2020 te su u istom razrađeni detalji konstrukcije te nacrti armature. Računski model je napravljen u programu DLUBAL Rfem 5.24 te su rezultati korišteni za dimenzioniranje AB elemenata prema graničnom stanju nosivosti i graničnom stanju uporabivosti, a u skladu s važećim propisima odnosno konstrukcijskim Eurokodovima.In this thesis a precast concrete sports structure was made. A model of precast concrete structure was assembled in REVIT 2020, also in this software the details of construction and the drawing of the reinforcement are diluted. The structural analysis was done in DLUBAL Rfem 5.24. with the dimensions of the elements and loads. Obtained results were used to design optimum size of each RC element according to the ultimate limit state of capacity and serviceability limit state in accordance with the valid regulations, i.e. Eurocode
Seismic design of structures - the comparison of different approaches and standards
No full textU diplomskom radu obrađena je tema Usporedba proračuna AB konstrukcija europskim i američkim normama za projektiranje. U radu se razrađuje pristup projektiranju seizmičkog djelovanja prema europskim (EN1998) te američkim (ASCE7) normama. Prvi dio odnosi se na teorijsku razradu normi a zatim i primjena na numeričkom modelu konstrukcije gdje je provedena analiza prema normama te usporedba na temelju istog. Teorijski dio detaljnije je obrađen skicama, grafovima te jednadžbama koje su bitne za potresno djelovanje i dinamiku konstrukcija. Prikazani su osnovni principi na kojima se temelji projektiranje prema ovim normama provedbom modalne analize analiziran je njihov odnos. Numerički model konstrukcije izrađen u programu „Scia Engineer 19.1“ Svrha ovog rada je doprinos komparativnoj analizi rezultata dobivenih dvjema različitim normama.In this Master´s Thesis the topic of Seismic design of structures – the comparison different approaches and standards was discussed. The paper elaborates an approach to the design of seismic action according to (EN1998) and American (ASCE7) standards. The first part refers to the theoretical background oft he norms. The theoretical treated in more detail with sketches, graphs and equations that are important for seismic and structural dynamics. The basic principles on which the design according to these standards is based are presented, the implementation of modal analysis analyzes their relationship. Numerical model of construction was made in the program "Scia Engineer 19.1" The purpose of this Master`s Thesis is to contribute to the comparative analysis results obtained by two different norms
SEISMIC ASSESMENT AND STRENGTHENING OF EARTHQUAKE-DAMAGED BUILDING OF FACULCTY OF CIVIL ENGINEERING IN ZAGREB
No full textTema ovog diplomskog rada jest modeliranje i proračun različitih metoda pojačanja postojeće zidane građevine koja se nalazi u Savskoj cesti u Zagrebu, a u njoj se nalazi odsjek za hidrotehniku Građevinskog fakulteta u Zagrebu. Zgrada je oštečena u potresima u Zagrebu i u Petrinji koji se su dogodili 2020.godine. Rad se sastoji od teoretskog i praktičnog dijela. U prvom poglavlju dane su osnovne informacije o potresima u Hrvatskoj 2020. godine, tektonici područja, razvoju građevinskih propisa te šteti u obrazovnom sektoru. U drugom poglavlju opisane su metode procjene stanja postojećih zidanih konstrukcija. Treće poglavlje daje pregled metoda seizmičkog proračuna zidanih konstrukcija s naglaskom na metodi postupnog guranja koja se koristi u ovom radu. Ćetvrto poglavlje opisuje analizu postojećeg stanja konstrukcije te definiranje parametara potrebnih za seizmički proračun. U petompoglavlju nalazi se praktični dio rada te je dana usporedba modeliranja postojećeg stanja u 3DMacru i 3Muri-ju. Teoretski pregled tehnika popravka i pojačanja konstrukcija nalazi se u šestom poglavlju. Na kraju rada napravljena je zaključak te se osvrnulo na zakone i postojeću legislativu u Republici Hrvatskoj.The topic of this thesis is the modeling and calculation of different methods of strengthening the existing masonry building located in Savska cesta in Zagreb, which houses the Department of Hydrotechnics of the Faculty of Civil Engineering in Zagreb. The building was damaged in the earthquakes in Zagreb and Petrinja that occurred in 2020. The paper consists of a theoretical and a practical part. In the first chapter, basic information is given about the earthquakes in Croatia in 2020, the tectonics of the area, the development of building regulations and damage in the education sector. In the second chapter, the methods of assessing the condition of existing masonry structures are described. The third chapter provides an overview of the methods of seismic calculation of masonry structures with an emphasis on the gradual pushing method used in this paper. The fourth chapter describes the analysis of the existing state of the structure and the definition of the parameters required for the seismic calculation. In the fifth chapter, there is a practical part of the work and a comparison of the modeling of the existing state in 3DMacro and 3Muri is given. A theoretical overview of structural repair and strengthening techniques can be found in the sixth chapter. At the end of the paper, a conclusion was made and the laws and existing legislation in the Republic of Croatia were referred to
Analysis of seismic vulnerability of unfeinforced masonry buildings
No full textTema ovog diplomskog rada je procjena potresne oštetljivosti zidanih zgrada na području Grada Zagreba koristeći dvije metode: makroseizmičku i Vicente metodu. U uvodnom dijelu rada daje se pregled potresa koji su pogodili područje Republike Hrvatske 2020. godine, opisane su karakteristične vrste oštećenja te je dan pregled materijalne i financijske štete nastale uslijed potresa. Drugo poglavlje bavi se metodama procjene stanja postojećih konstrukcija te metodama procjene seizmičkog rizika uz detaljan opis makroseizmičke i Vicente metode. U glavnom dijelu diplomskog rada spomenute metode se upotrebljavaju za procjenu potresne oštetljivosti 20 zgrada smještenih na području Donjeg grada, a dobiveni rezultati se analiziraju i uspoređuju.The topic of this thesis is the assessment of seismic vulnerability of masonry buildings in the City of Zagreb using two methods: the macroseismic method and the Vicente method. The introductory part provides an overview of the earthquakes that affected the Republic of Croatia in 2020, describes the characteristic types of damage, and presents an overview of the material and financial losses caused by the earthquakes. The second chapter deals with methods for assessing the condition of existing structures and methods for assessing seismic risk, with a detailed description of the macroseismic and Vicente methods. In the main part of the thesis, the mentioned methods are used to assess the seismic vulnerability of 20 buildings located in the Lower Town, and the obtained results are analyzed and compared
The assessment and seismic design of the existing heritage structures
No full textU diplomskom radu obrađena je tema „Procjena stanja i seizmički proračun konstrukcija kulturne baštine“. U prvom dijelu rada, dan je teoretski osvrt koji je poslužio kao osnova za daljnju razradu problematike. Drugi dio diplomskog rada odnosi se na vizualnom pregledu jedne tipične postojeće konstrukcije na kojoj je izvršeni dinamički proračun konstrukcije. Teorija je detaljno obrađena uz odgovarajuće skice, grafičke priloge te tekstualna objašnjenja. Prikazana je osnovna problematika potresa, njegova pojava i posljedice, osnovni pojmovi dinamike konstrukcija te su detaljno prikazane metode proračuna potresnog djelovanja. U drugom teorijskom dijelu uspoređena je praksa vezana uz potrese u Italiji te u Hrvatskoj s naglaskom na ovogodišnji potres. Objašnjene su i prikazane suvremene metode analiza konstrukcija primjenom BIM tehnologija. Praktični dio rada sastoji se od vizualnog terenskog pregleda postojeće građevine te analizom u programskom paketu 3muri.In this Master's Thesis the topic of the assessment and seismic design of the existing heritage structures was discussed. In the first part of the assignment, the topic was elaborated throughout a theoretical framework which was then applied in the visual assessment and numerical model of the structure where a dynamic design was performed. The theory was elaborated in detail with appropriate sketches, graphic appendices and significant explanations. The basic problems of earthquakes, its occurrence and consequences, the basic concepts of structural dynamics are presented, and the methods of calculating earthquake effects are presented in detail. The second theoretical part compares the practice related to the needs in Italy and in Croatia with an emphasis on this year's earthquake. Modern methods of structural analysis using BIM technology are explained and presented. The practical part of the work consists of a visual condition inspection of the building and an analysis of it in the 3muri software
The assessment and seismic design of the existing heritage structures
No full textU diplomskom radu obrađena je tema „Procjena stanja i seizmički proračun konstrukcija kulturne baštine“. U prvom dijelu rada, dan je teoretski osvrt koji je poslužio kao osnova za daljnju razradu problematike. Drugi dio diplomskog rada odnosi se na vizualnom pregledu jedne tipične postojeće konstrukcije na kojoj je izvršeni dinamički proračun konstrukcije. Teorija je detaljno obrađena uz odgovarajuće skice, grafičke priloge te tekstualna objašnjenja. Prikazana je osnovna problematika potresa, njegova pojava i posljedice, osnovni pojmovi dinamike konstrukcija te su detaljno prikazane metode proračuna potresnog djelovanja. U drugom teorijskom dijelu uspoređena je praksa vezana uz potrese u Italiji te u Hrvatskoj s naglaskom na ovogodišnji potres. Objašnjene su i prikazane suvremene metode analiza konstrukcija primjenom BIM tehnologija. Praktični dio rada sastoji se od vizualnog terenskog pregleda postojeće građevine te analizom u programskom paketu 3muri.In this Master's Thesis the topic of the assessment and seismic design of the existing heritage structures was discussed. In the first part of the assignment, the topic was elaborated throughout a theoretical framework which was then applied in the visual assessment and numerical model of the structure where a dynamic design was performed. The theory was elaborated in detail with appropriate sketches, graphic appendices and significant explanations. The basic problems of earthquakes, its occurrence and consequences, the basic concepts of structural dynamics are presented, and the methods of calculating earthquake effects are presented in detail. The second theoretical part compares the practice related to the needs in Italy and in Croatia with an emphasis on this year's earthquake. Modern methods of structural analysis using BIM technology are explained and presented. The practical part of the work consists of a visual condition inspection of the building and an analysis of it in the 3muri software
Seismic design of structures - the comparison of different approaches and standards
No full textU diplomskom radu obrađena je tema Usporedba proračuna AB konstrukcija europskim i američkim normama za projektiranje. U radu se razrađuje pristup projektiranju seizmičkog djelovanja prema europskim (EN1998) te američkim (ASCE7) normama. Prvi dio odnosi se na teorijsku razradu normi a zatim i primjena na numeričkom modelu konstrukcije gdje je provedena analiza prema normama te usporedba na temelju istog. Teorijski dio detaljnije je obrađen skicama, grafovima te jednadžbama koje su bitne za potresno djelovanje i dinamiku konstrukcija. Prikazani su osnovni principi na kojima se temelji projektiranje prema ovim normama provedbom modalne analize analiziran je njihov odnos. Numerički model konstrukcije izrađen u programu „Scia Engineer 19.1“ Svrha ovog rada je doprinos komparativnoj analizi rezultata dobivenih dvjema različitim normama.In this Master´s Thesis the topic of Seismic design of structures – the comparison different approaches and standards was discussed. The paper elaborates an approach to the design of seismic action according to (EN1998) and American (ASCE7) standards. The first part refers to the theoretical background oft he norms. The theoretical treated in more detail with sketches, graphs and equations that are important for seismic and structural dynamics. The basic principles on which the design according to these standards is based are presented, the implementation of modal analysis analyzes their relationship. Numerical model of construction was made in the program "Scia Engineer 19.1" The purpose of this Master`s Thesis is to contribute to the comparative analysis results obtained by two different norms
The seismic assessment of the existing structure in Zagreb - The case study
No full textNiz zastrašujućih potresa, koji su se dogodili 2020. godine u Hrvatskoj, osvijestio je potrebu za procjenom stanja i seizmički proračun postojećih konstrukcija jer većinu građevinskog fonda čine zidane konstrukcije kojima je istekao uporabni vijek trajanja. U ovom diplomskom radu provedena je detaljna procjena stanja i seizmički proračun postojeće konstrukcije u Zagrebu. Za samo razumijevanje potresnog djelovanja objašnjen je mehanizam nastanka potresa, bilježenje i lociranje potresa, razvoj potresnog inženjerstva u svijetu i u Hrvatskoj. Opisane su metode procjene stanja i metode seizmičkog proračuna. Za postojeću konstrukciju provedena je detaljna procjena stanja koja se sastoji od vizualnog i detaljnog pregleda. Provedeni su istražni radovi na postojećoj konstrukciju kako bi se odredile mehaničke karakteristike materijala. Postojeća konstrukcija modelirana je u programskom paketu 3Muri radi provedbe metode postupnog guranja. Provedena je pojednostavljena metoda proračuna otpornosti ziđa radi usporedbe rezultata. Osim procjene stanja i seizmičkog proračuna, dan je prijedlog za mjere sanacija postojeće konstrukcije.A series of frightening earthquakes, which occurred in 2020 in Croatia, raised awareness of the need for assessment and seismic design of existing structures. Raising awareness is necessary because most of building stock consists of masonry structures that have an expired service life. In this master thesis, a complete assessment and seismic calculation of existing structure in Zagreb has been performed. For understanding of seismic action, the mechanism of earthquake occurrence, recording and locating earthquake, development of seismic engineering in the world and in Croatia are explained. Methods for assessment and methods for seismic design are described. For the existing structure, a detailed assessment has been performed. Detailed assessment for the existing structure consists of a visual and detailed inspection. In order to determine the mechanical characteristics of the material, on-site tests have been performed. The existing structure was modelled in the software 3Muri to perform a pushover analysis. To compare the results, a simplified method for calculating resistance of masonry walls was performed. In addition to the assessment and the seismic calculation, a proposal for measures to strengthen the existing structure are given
Design of a precast concrete hall
No full textProjektni zadatak ovog diplomskog rada je montažni armiranobetonski izložbeni salon manjih jahti i brodova. Kompletna vizualizacija, nacrti i razrada detalja konstrukcije su izvedeni u programskom paketu REVIT 2020 dok je proračunski model izveden u programu DLUBAL RFEM5. Proračunski model iz programa DLUBAL RFEM5 je korišten u svrhu dobivanja rezultata za granično stanje nosivosti i granično stanje uporabivosti, prema kojima je vršeno dimenzioniranje montažnih armiranobetonskih elemenata. Kompletan proračun je izveden u skladu s važećim propisima navedenim u Eurokodovima.The project task of this master thesis is a prefabricated reinforced concrete showroom of small yachts and ships. Complete visualization, drawings and elaboration of construction details were assembled in REVIT 2020 software package, while the calculation model was made in DLUBAL RFEM5 program. The calculation model from DLUBAL RFEM5 program is used for the purpose of obtaining results for the ultimate limit state and serviceability limit state. Prefabricated reinforced concrete elements were designed according to the HRN EN1992
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