Urbanisation as a tool for economic growth – Novi Sad the developmental city

Current research and documents on urban development emphasise the links between economic growth and planning strategies, making urban space an asset of the contemporary market economy. The analysis of development trends in post-transitional cities shows numerous similarities to the Asian concept of developmental cities. This study examines current urban development strategies in the city of Novi Sad (Serbia), particularly focusing on trends in housing projects, which are the major contributors to the production of urban space. The housing policy in the city, spanning from urban reconstruction after WWII until the present, is comprehended through statistical data on construction activity, taken as an indicator of change in urban politics and the general concept of city development. The major change in this concept is the weakening of the connection between city population growth and apartment building production. As a result, human needs are no longer the primary motive for apartment construction. The comparison, analysis, and conclusions based on the interpretation of the indicators highlight the necessity for rethinking present urban practises in order to combat the continual process of degrading the quality of life in the city

Evaluation of Elements for Selection of Optimal Solution for Facility Passive Protection from the Fire Spread over Façade

Fire protection of facilities is basically based on passive and active form. Given that active forms have a limited role in the early stages of fire, the decisive role in preventing the spread of fire, until the arrival of emergency firefighting units, have elements of passive protection at the facility. The topic of this paper is facades in residential buildings and their role in spreading fires throughout the building. The aim of this paper is to design one of the possible models for choosing the optimal façade shape (or the facility), which would passively prevent the transmission of fire over the facade. For these purposes, an analysis of key aspects was performed, which, in addition to fire resistance, considered seismic resistance and energy efficiency, both dependent on the shape of the facility. The obtained results are valorized through a quality scale, based on which is determined whether the solution is bad, acceptable, satisfactory, or good. This model contributes to a quality and controlled design process, because the concept of a facility, that meets the requirements of modern construction, is obtained at an early stage. The practicality of this model is reflected in the fact that, on the one hand, in the design phase it allows to bring more variant solutions at the same qualitative level, and on the other hand it is applicable to already constructed facilities, which indicates shortcomings and possibilities of their reconstruction

Expert project analyses in the process of road maintenance management

Za potrebe učinkovitog gospodarenja održavanjem cestovne mreže neophodno je raspolagati s ažurnom informacijskom osnovom i odgovarajućim modelom za odlučivanje. U radu se daje prikaz metodološkog postupka za ekspertne projektne analize za radove na održavanju i poboljšanju cesta uz korišćenje Baze Cestovnih Podataka (BCP) i primjenu HDM-4 modela. Postupak je uspješno primjenjen i prihvaćen u apliciranju zahtjeva za financiranje radova na održavanju i poboljšanju cestovne mreže od strane međunarodnih financijskih institucija (Svjetska Banka, EIB i EBRD) tijekom 2012-e godine.An updated information system, and an appropriate decision making model, must be put in place for an efficient road maintenance management. A methodological procedure for expert project-level analyses of road maintenance and improvement activities, based on the Road Data Base (RDB) and the HDM-4 model, is presented in the paper. The procedure was successfully applied and accepted in 2012, in the scope of application for funding of road network maintenance and improvement by international financing institutions (World, Bank, EIB and EBRD)

The Influence of Temperature Changes on Concrete Pavement

The paper deals with the influence of temperature changes on concrete pavement. Due to differences in temperature on the upper and the lower surface of a concrete slab, the bending stress is created, resulting in concrete slab deformation. During the process of heating, the difference in temperature between the upper and the lower surface of pavement is created as a result of heat conduction. The upper surface has a tendency to expand (tense), whereas the lower one does not alter its dimensions, which results in generating the bending stress. Concrete pavement is most commonly placed in zones with extremely heavy traffic load as well as at bus stops. The analysis was carried out at bus stops in the city of Novi Sad for three different types of slab thickness. The thickness of slabs was 20, 22 and 24 cm. The testing was conducted in the longitudinal and transverse direction of the concrete pavement, both in the middle and on the edge of a slab. During the analysis of results, a conclusion was drawn that the concrete slabs were of different dimensions and thickness, and that they were placed on different subgrade reactions. The maximum values of stress were recorded in the middle of a concrete slab, in slabs whose thickness amounted to 24 cm, while the minimum stresses were identified in slabs which were 20 cm thick. The paper presents the stresses of concrete slabs, caused by changes in temperature, which depend on the subgrade reaction and dimensions of concrete slabs

Risk Assessment Model for Planning and Design Processes of Wastewater Treatment Plants

Before joining the European Union, Serbia faces a big task related to the treatment and purification of wastewater. The capital of Serbia, Belgrade, and some larger cities do not have wastewater treatment plants. Although there are no plants in larger cities in Serbia, they still exist on the territory of the state itself. However, either they are not in good condition, or they do not work with the projected capacity or they do not work at all. This paper presents the model for risks quantification for the planning and design processes of wastewater treatment plants in which the risks are divided into 6 categories: legal, financial and economic, logistics, environmental protection, management and design risks. 37 risks have been defined, analyzed and evaluated by the experts participating in the Delphi method. Experts in various fields dealing with the planning, design or construction of wastewater treatment plants were selected to assess the risks through 2 rounds of Delphi methods and reach the consensus on major risks. By using statistical methods, it is determined that the experts reached the consensus after which each risk received its own relative weighting coefficient. Risk model has been initially verified by experts from Delphi team on two projects during construction phase. This model is important in the initial phases of the project, when the investor starts the project, as well as in the design phases

Multi-criteria analysis of variation solutions for the pipeline route by applying the PROMETHEE method

U radu je razmatran problem izbora najpovoljnije varijante trase cjevovoda Beloševac - Divci u okviru Kolubarskog regionalnog sustava vodosnabdjevanja (Srbija). Varijante su vrednovane na osnovu pet kriterija, od kojih su tri kriterija ekonomskog karaktera. Problem izbora optimalne varijante trase cjevovoda riješen je višekriterijskom analizom primjenom metode PROMETHEE implementacijom u softversko rješenje Visual PROMETHEE1.4. Metoda PROMETHEE se pokazala primjenjivom i pogodnom u praktičnim problemima građevinskog inženjerstva, u fazi konačnog odlučivanja u području planiranja izgradnje. Primjenom metodologije višekriterijskog vrednovanja, danom u ovom radu, korisniku se predlaže varijanta s minimalnim troškovima izgradnje.The paper considers the problem of selecting the most appropriate variation for the pipeline route Beloševac - Divci within the Kolubara regional water supply system (Serbia). Variations are evaluated according to five criteria, three of which have an economic character. The problem of selecting the optimal variant for the pipeline route is solved using the multi-criteria analysis by applying the PROMETHEE method and the implementation into the software package Visual PROMETHEE 1.4. The PROMETHEE method has proved to be applicable and suitable in solving practical problems related to civil engineering, in the phase of the final decision-making in the area of construction planning. The application of multi-criteria evaluation methodology, provided in this paper, proposes the variant with the minimal construction costs

Outputand perfomance based road maintenance contracting – case study Serbia

U radu se opisuju glavne karakteristike ugovora o održavanju i popravku cesta prema Output and Performance-Based Contracting for Roads (OPBC). Daje se pregled iskustava u primjeni takvih ugovora. Agencije za održavanje cesta koje su prihvatile OPBC pristup uštedjele su od 10 % do 40 % u cijeni radova u usporedbi s radovima ugovorenim po tradicionalnoj metodi. U razdoblju od 2004. do 2008. u Srbiji je bio primijenjen način ugovaranja prema Output Performance-based Maintenance Contract (OPBC) za pilot projekt u okviru Transport Rehabilitation Project-a financiranog od Svjetske banke. Prikazani su glavni rezultati i zaključci.The paper describes the main features of contract work for road maintenance and improvement under the Output and Performance-Based Contracting for Roads (OPBC). Experiences in the application of such contracts for the roads are reviewed. Road agencies that have adopted an OPBC approach have achieved cost savings from 10 % to 40 % compared to traditional method-based contracts. During the period 2004 ÷ 2008 Serbia implemented the Output Performance-based Maintenance Contract (OPBC) for routine road maintenance pilot project within Transport Rehabilitation Project financed by World Bank. The main results and conclusions are presented

Methods for determining increased maintenance of pavement structures in the city

U radu je dan prikaz metode za prikupljanje podataka, a nakon toga i metode za određivanje pojačanog održavanja kolničkih konstrukcija u gradu. Za analizu su uzeta tri tipa gradske cestovne mreže, odnosno analizirane su kolničke konstrukcije za gradsku magistralu, gradsku prometnicu i glavnu ulicu. Korišteni su podaci koji su uzeti na terenu i dobiveni rezultati laboratorijskih ispitivanja. Nakon prikazanih svih prikupljenih podataka, dano je tehničko rješenje kolničke konstrukcije, a potom se dolazi do zaključka da treba izvesti pojačano održavanje, odnosno rekonstrukciju sva tri tipa kolničkih konstrukcija.A data collection method, and methods for determining increased maintenance of pavement structures in the city, are presented in the paper. Three types of urban road network were selected for the analysis, i.e. pavement structures for the urban main road, urban road, and collection street were analysed. On-site data and laboratory test results were used in the study. After presentation of all data collected for the analysis, a technical solution for pavement structure is given, and it is concluded that an increased maintenance, i.e. full-scope rehabilitation, must be made for all three pavement structure types

Sustainability of Cultural Memory: Youth Perspectives on Yugoslav World War Two Memorials

The noticeable urgent need for the preservation of collective and cultural memory in Europe, coupled with a fear of loss of important aspects of heritage, indicates the importance of educating the youth who will become future policymakers in the field. Analyses of the survey conducted through this research show the current perspective of youth on the typology of World War II memorials on the territories of the former republics, now independent states, of SFR Yugoslavia in Southeast Europe. Targeting architecture and civil engineering students as a specific youth group who are directly involved in learning about the built memorial structures, as well as the phenomenological background of space, creation of place and memories, resulted in a qualitative observation of the group’s understanding and judgement of the topic. This article investigates the level of knowledge and emotional response to memorial heritage within the target group. It addresses relevant issues of age, gender, level of study, and respondents’ backgrounds, demonstrating the existence of an initial interest in memorial heritage among the architecture-oriented youth. With an additional focus on a possible active role in heritage preservation and future placement, the research indicates a segment in the youth’s comprehension of valuable memorial heritage that needs to be improved