Repository of Faculty of Civil Engineering Osijek
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A unified design proposal for shear stress prediction in crossing areas for cross laminated timber at in-plane shear and beam loading conditions
No full textEnvironmental and urbanization challenges during the last few decades encouraged steady growth of mass timber construction where attention is drawn to cross laminated timber (CLT) as one of the most interesting products in terms of mechanical properties, versatility, efficient prefabrication and sustainability. Standardisation and codification regarding testing and design of CLT elements are hence pointed out as one of the main issues within the ongoing revision procedure of Eurocode 5. A consistent and unified design approach for CLT at pure in-plane shear loading conditions (shear walls) and at in-plane beam loading conditions is however still missing. This paper deals with analytical models for the determination of stress components related to pre- dictions of load bearing capacity of CLT with respect to shear failure mode III – shear failure in the crossing areas constituted by the flatwise bonded areas between laminations of adjacent layers. This failure mode is relevant for both pure in-plane shear loading and in-plane beam loading conditions. The paper presents a review of previously proposed models for the prediction of shear stresses in crossing areas of CLT, for both loading conditions. Comparisons between FE-results and model predictions are reviewed indicating significant differences between them concerning the predicted influence of the CLT element lay-up and values of maximum shear stresses. Based on simplifications of models previously presented, a unified design proposal that is based on a rational and consistent mechanical background for both loading situations and that shows overall good agreement with FE-results is presented
A Comparative Study of the Effects of Earthquakes in Different Countries on Target Displacement in Mid-Rise Regular RC Structures
No full textData from past earthquakes is an important tool to reveal the impact of future earthquakes on engineering structures, especially in earthquake- prone regions. These data are important indicators for revealing the seismic loading effects that structures will be exposed to in future earthquakes. Five different earthquakes from six countries with high seismic risk were selected and were within the scope of this study. The measured peak ground acceleration (PGA) for each earthquake was compared with the suggested PGA for the respective region. Structural analyzes were performed for a reinforced-concrete (RC) building model with four different variables, including the number of storeys, local soil types, building importance class and concrete class. Target displacements specified in the Eurocode-8 were obtained for both the suggested and measured PGA values for each earthquake. The main goal of this study is to reveal whether the proposed and measured PGA values are adequately represented in different countries. We tried to reveal whether the seismic risk was taken into account at a sufficient level. In addition, target displacements have been obtained separately in order to demonstrate whether the measured and suggested PGA values for these countries are adequately represented in structural analysis and evaluations. It was concluded that both seismic risk and target displacements were adequately represented for some earthquakes, while not adequately represented for others. Comments were made about the existing building stock of the countries considering the obtained results
Prediction of compressive strength of concrete at high heating conditions by using artificial neural network-based Bayesian regularization
No full textCement concrete is the most commonly used material today for constructing residential or commercial buildings, industrial parks, or particular components such as tunnel slabs where there is a high risk of fire. This structure requires concrete to be subjected to high temperatures generated by fires. However, concrete under the influence of high temperature has very complex behavior states with deformations, physical and chemical changes as the temperature rises dramatically. In this study, an artificial neural network-based Bayesian regularization (ANN) model is proposed to predict the compressive strength of concrete. The database in this study includes 208 experimental results synthesized from laboratory experiments with 9 input variables related to temperature change and design material composition. The performance of the ANN model was evaluated using K-fold cross- validation and statistical criteria, including mean absolute error (MAE), root mean square error (RMSE), and coefficient of determination (R2). The results show that the proposed ANN model is a reasonable, highly accurate, and useful prediction tool for saving time and minimizing costly experiments
Četrdeset i pet godina Građevinskog i arhitektonskog fakulteta Osijek
No full textDavna 1976. smatra se početkom djelovanja današnjega Građevinskog i arhitektonskog fakulteta Osijek (GrAFOS), od tada kontinuirano se u Osijeku obrazuju inženjeri građevinarstva, a od 2016. i inženjeri arhitekture
Analysis and design of slabs of a reinforced concrete residential building using Python and Excel
No full textZavršni rad prikazuje dimenzioniranje i proračun potrebne ploštine armature ploča nosivih u dva smjera te odabir odgovarajuće standardne armaturne mreže. Proračun je obavljen za ploče promatrajući presjeke u polju i nad osloncem. Prikazan je ručni proračun te proračuni pomoću programa Python i Excel za iste ulazne podatke. Svrha tri načina proračuna je upoznati se s mogućnostima proračuna korištenih računalnih programa te točnošću proračuna koji programi nude. Promjenom ulaznih podataka računalnim programima automatski se generiraju nova rješenja, što ubrzava proces proračuna.The bachelor thesis shows the dimensioning and calculation of the required surfaces of the reinforcement of the slabs bearing in two directions and the selection of the appropriate standard reinforcing network. The calculation was carried out for slabs observing the cross-sections in the field and over the support. The manual calculation and calculations using Python and Excel are displayed for the same input data. The purpose of the three ways of calculation is to familiarize yourself with the calculation options of the computer programs used and the accuracy of the calculations that the programs offer. By changing the input data, computer programs automatically generate new solutions, which speeds up the calculation process
Architectural - urban design of Gacka business zone
No full textZgrada želi biti dio svog okruženja, ne želi se nametati masivnošću, već
imitirajući ga uklopiti se i istaknuti blagodati prirode. Primarno preuzima
element vode L oblika, koji se nalazi na istočnoj strani, i njime oblikuje svoj
volumen blagim istacima ili uvlačenjima. Također, na oblikovanju pročelja
jasno ukazuje na nit vodilju koncepta, staklom imitirajući reflektirajuću vodu, a
dosljedan oblik L naglašavaju blokovi tegle sa zelenilom, meandrirajući po
etažama.Building wants to be a part of its own surroundings, not trying to stick out with
massivness while hoping to imitate the ambience to accentuate nature's
magnificence. Primarily taking L- shaped water element located on the eastern
side and thus forming the volume by mild effluxes or indentations. Likewise,
outline of the facade clearly represents the guiding light of the concept, with
glass imitating reflecting water and block-like greenery pots meandering on the
facade
Calculation of performed works in construction
No full textU uvodnom dijelu rada navedeni su pojmovi koji se koriste u tekstu rada. Detaljno su opisane obračunske situacije, obrazac situacije i podaci koji se unose u obrazac, rokovi ovjere i isplate situacija. Dano je objašnjenje obračuna i naplate ovisno o načinu ugovaranja cijene (po troškovniku, ukupnim iznosom, na temelju troškova i određenog postotka dobiti za izvođača). Definiran je pojam građevinske knjige, opisan način vođenja građevinske knjige, sadržaj standardiziranog obrasca građevinske knjige. Primjer lista građevinske i obrasca situacije prikazani su u prilogu rada
Roof calculation - single pendant
No full textZadatak završnog rada je bio proračun i dimenzioniranje dvostrešnog krovišta obiteljske kuće, kao konstruktivni sistem odabrana je jednostruka visulja. Kuća se nalazi u Osijeku na nadmorskoj visini od 94 m.n.m i tlocrtnih je dimenzija 8 x 6 m , prepust streha sa svake strane iznosi 50 cm. Nagib krovnih ploha u odnosu na horizontalu je 35°. Visinska stropna kota je na +3,80m. Za elemente krovne konstrukcije korišteno je cjelovito drvo razreda čvrstoće C24. Djelovanja na konstrukciju su izračunata prema HRN EN propisima. Dispozicija i nacrti izrađeni su koristeći Autodesk Autocad 2023, a analiza proračuna izvedena je u Autodesk Robot 2023.The aim of this undergraduate thesis was to calculate a load analysis and design of the gabled trussed roof of the single hanging type. The house is located in Osijek, on an altitude of 94 meters above sea level. The dimensions of the house based on the floor plan are 8 x 6 m , the lenght of the eaves on both sides is 50cm. The pitch of gabled roof is 35° above the horizontal line. The ceiling level is on +3,80m. Softwood of structural strength C24 was used for all the elements in the wooden roof. All the actions on the structure are calculated according to the HRN EN regulations. The roof disposition and drafts were drawn in Autodesk Autocad 2023, the structural performance analysis was calculated in Autodesk Robot 2023
Water supply of the settlement
No full textOvim diplomski radom obrađena je tema vodoopskrbnog sustava naselja Soljani. Prvi dio rada sadrži teorijski dio u kojem su prikazane geografske karakteristike naselja, mješovita vodoopskrbna mreža koja je korištena za ovu vodoopskrbnu mrežu, trasa cjevovoda, vrsta cijevnog materijala, promjer i polaganje cjevovoda te objekti na vodoopskrbnoj mreži. Drugi dio rada sadrži tehničko rješavanje vodoopskrbnog sustava. Rješenje vodoopskrbnog sustava dano je kroz 4 različite varijante rješenja. U varijanti 1 je vodoopskrba napravljena sa samo tri crpne stanice, u varijanti 2 sa četiri crpne stanice i ukopanom vodospremom, u varijanti 3 s tri crpne stanice i visinskom vodospremom visine 31 m, a u varijanti 4 s tri crpne stanice i visinskom vodospremom visine 60 m. Varijante su detaljno prikazane te su na kraju međusobno uspoređene. Hidraulički model izrađen je uz pomoć programskog paketa EPANET 2.0.Analysis and design of water supply system of the settlement Soljani is the topic of this master thesis. The first part of this work contains theoretical part which presents geographic characteristics of the settlement, combined water supply network which is used in this water supply system, pipes path, pipes material type, diameter of pipeline and pipelines deposit and objects that are present on this water supply network. The second part of this work contains technical solution of the water supply system. The solution is given with 4 different variations. In variation 1 water supply system is made with just three pumps, in variaton 2 with four pumps and an underground water tank, in variation 3 with three pumps and a water tower which is 31 m tall, in variation 4 with three pumps and a water tower which is 60 m tall. Variations are presented detailed and are compared between themselves at the end. The hydraulic model was made using the EPANET 2.0 software package