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Electronic Journal of the Faculty of Civil Engineering Osijek, e-GFOS is an Open Access online journal which publishes research and professional articles in all areas of civil engineering and architecture.
Electronic Journal of the Faculty of Civil Engineering Osijek, e-GFOS, a peer-reviewed journal, is an important and reliable source of current information on developments in civil engineering and architecture. The topics covered in the journal include (but not limited to) concrete structures, construction materials, structural mechanics, soil mechanics, foundation engineering, water resources, hydraulics, fluid-solid-structure interactions, constructional management, architecture and urbanism and other civil engineering and architecture relevant areas.
Publishing in e-GFOS is charge-free, there are no APCs or any fees or charges for authors.

Number 24 - July, 2022.


      

FASTEST PATH VEHICLE SPEED ANALYSIS AT STANDARD TURBOROUNDABOUTS WITH VARIOUS APPROACH LEG POSITIONS

Autori: T. Džambas, V. Dragčević

Sažetak: In previous studies, a new (improved) turboroundabout design approach based on the rules of the design vehicle movement geometry was proposed, and the optimal design of elements of standard turboroundabouts for various design vehicle scenarios, circulatory roadway radii, and approach leg positions was defined. Within the scope of this research, the applicability of the current Dutch calculation model for fastest-path vehicle speed analyses at standard turboroundabout schemes designed by a previously described procedure was examined. Research results have shown that this Dutch calculation model does not apply to standard turboroundabouts whose approach legs are aligned under various angles and translatory shifted regarding the roundabout geometric center, and therefore, should not be used for speed analyses at this roundabout type until a new calculation model, which corresponds to the real traffic situation, is developed.

Ključne riječi: Standard turboroundabouts, vehicle movement geometry, fastest path, speed analysis, Dutch calculation model.

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PERFORMANCE ANALYSIS OF A SIMPLE ALUMINIUM STRUCTURE IN FIRE CONDITIONS

Autori: D. Milan, N. Torić, I. Boko

Sažetak: In this study, a performance analysis of a simple aluminum (EN AW-6061 T6) structure is presented under fire conditions. A simple structure was also analyzed in a steel (S235) building variant for comparison purposes. All loads were determined in accordance with Eurocode rules. Internal forces were calculated using the SCIA Engineer 19.1. Cross-section resistances and element stability checks were performed using EN1993-1-1 and EN1993-1-2 for steel and EN1999-1-1 and EN1999-1-2 for aluminum. The main conclusion of this study is that aluminum, although initially more expensive than steel, can offer rational solutions for structures in which the difference in structural performance in fire conditions between aluminum and steel is not sufficiently drastic to yield significantly higher costs for fire protection in aluminum. Furthermore, aluminum building variants offer less mass, easier transport, and resistance to corrosion. Hence, for structures with the aforementioned factors as the main demands, aluminum can be a better option than steel.

Ključne riječi: Aluminum, steel, fire, EN AW-6061 T6, S235, fire resistance.

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COMPARISON OF DIFFERENT ROOF TYPES IN TERMS OF LIGHTING CONDITIONS IN AN INDUSTRIAL HALL

Autori: E. Dolnikova, B. Dolnik

Sažetak: The indoor climate of industrial buildings is a function of production technology and requirements for the creation of an optimal artificial material environment. Currently, we consider daylight not only as a source of illumination, but also as an aesthetic element of a building or a way of reducing energy consumption. Light in a closed space allows a person to obtain basic visual information (perception) and perform visual tasks. Top lighting schemes can provide increasingly more useful illumination from smaller apertures than side lighting when they capture and diffuse sunlight. Sunlight is roughly 10 times brighter than light from the sky or clouds. A combined lighting system (top lighting and side lighting) ensures a better light distribution in industrial buildings. In this study, we present a comparison of daylight factors for different types of skylights. Specifically, a saddle skylight in the hall and three other types of skylights were created and simulated. In all the cases, the models of skylights were prepared and simulated using RADIANCE. Additionally, a comparison of simulation results obtained with RADIANCE was conducted to quantify the lighting climate. Overall, saddle roof was considered as the best choice for daylight in an industrial hall.

Ključne riječi: Skylights, industry, daylight simulation, daylight factor, indoor environment

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CAN YOU ACCESS CULTURE? AN EVALUATION MODEL FOR THE ACCESSIBILITY OF CULTURAL LOCATIONS

Autori: I. Mrak, C. Matan

Sažetak: Participation in social and cultural life is the right of every human being, but for some persons (with disability, chronic illness, mobility and sensory issues…) it is greatly hindered by the inaccessibility of spaces and content. This topic has recently gained importance, owing to our growing awareness of the percentage of persons with mobility problems, and particularly regarding the aging population in many countries. Moreover, for several countries, the issue of accessibility is also related to the growing importance of tourism to their economy or the presence of many persons with disabilities related to wars. This paper presents the research on the evaluation of the accessibility of cultural locations (urban sites, museums, parks, theatres, etc.) through in-depth interviews and surveys with representatives of persons with disabilities, chronic illness, mobility and sensory issue and mental health issues, and by creating an evaluation multicriteria model with guidelines based on these inputs. The results reveal that while it is possible to evaluate the flow and content of cultural activities, there are problems of inaccessibility and lack of awareness among the general and professional public.

Ključne riječi: Accessibility, evaluation model, cultural heritage, public participation, in-depth interviews, spatial Aspects.

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PERFORMANCE MANAGEMENT IN CIVIL ENGINEERING: A SYSTEMATIC LITERATURE REVIEW

Autori: I. Marović, T. Hanak, S. Plaum

Sažetak: The construction industry is generally one of the fundamental industries of a country, weighing between 5 to 10% of the gross domestic product. Rapid changes in the construction environment require a great deal of effort for a company or project manager to maintain the project successfully. To do so, applying performance management is of crucial importance. Therefore, a systematic literature review was conducted to detect new trends and highlight the evolvement of this research topic. The conducted bibliometric analysis resulted in 1240 documents published in Scopus and Web of Science databases in the period from 2000–2021. The bibliometric indicators, network citations, and multivariate statistical analysis were obtained using JabRef, OpenRefine, Excel, and VOS viewer tools. The co-occurrence analysis showed three keywords clusters as current research hotspots that may be considered as potential research topics in the future: (1) value management in the construction industry, (2) organisation innovation and knowledge management in a particular company, and (3) project management tools and techniques for a particular construction project.

Ključne riječi: Performance management, construction sector, systematic literature review, science mapping

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LABORATORY MODEL DESIGN FOR DEEP SOIL MIXING METHOD

Autori: M. İnanç Onur, M. Bıçakcı, P. Sezin Öztürk Kardoğan, A. Erdağ, M. Aghlmand

Sažetak: One of the most critical problems in the construction sector is the inadequate bearing capacities of subsoils. To solve this problem, various soil improvement methods are employed. Soil improvement is defined as the improvement in soil properties to the desired level by using various methods when the soil is not suitable for superstructure loads. Various types of soil improvement methods exist, and their application depends on the construction site, soil properties, earthquake zone, application time, and cost. One of the most widely used methods recently is the deep soil mixing method. In this study, a laboratory-scale deep soil mixing device is first developed; subsequently, the effects of injection pressure, mixing time, and dosing parameters on application are investigated. Deep soil mixing columns are prepared using different injection pressures, mixing times, and dosages and then subjected to the unconfined compression test. Results show that the effects of injection pressure, cement dosage, and mixing time on the unconfined compressive strength of deep soil mixing samples vary based on the initial soil properties.

Ključne riječi: Soil Improvement; deep soil mixing method; laboratory-scale device.

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