Slewing port jib cranesBoris Visočnik
, Stojan Kravanja
, 2002, pregledni znanstveni članek
Opis: The paper presents slewing port cranes with a luffing jib. The advantages of slewing port jib cranes are high lifting capacities, high speeds of re-loading and excellent mobility since they are capable of load lifting, travelling, luffing and slewing. The paper gives a detailed description of their characteristics such as the highest reached load-carrying capacities, speeds of motion and accelerations. It also presents the crane assembly, driving mechanisms, loads and load cases, transport by ships and testing of lifting capacity. As a practical example, the paper presents the slewing port jib crane with the capacity of 25/15/5 t at a 27/37/40 m radius made by the Slovenian companyMetalna Maribor for the shipyard 3. Maj, Rijeka, Croatia.
Ključne besede: cranes, port, port cranes, slewing port jib cranes
Objavljeno: 06.06.2017; Ogledov: 82; Prenosov: 4
Polno besedilo (3,08 MB)
Roundabout arm capacity determined by microsimulation and discrete functions techniqueTomaž Tollazzi
, Matjaž Šraml
, Tone Lerher
, 2008, izvirni znanstveni članek
Opis: The paper demonstrates the influence of the multi-channel pedestrian flow on the actual capacity of a one-lane roundabout, using micro-simulation and discrete functions. The proposed model is based on the theory of the expected time gap between the units of pedestrian traffic flow, which have the priority when crossing the arm of the roundabout. The proposed model represents an upgrade of the previous research in the field of modelling traffic flows in the one-lane roundabout.Apart from the multi-channel pedestrian flow the disturbances caused by the circular traffic flow of motorised vehicles at the roundabout are also considered. In this way the model can better illustrate the real conditions in traffic. A simulation analysis has been performed on the roundabout arm at Koroška Street in Maribor. The results of the analysis have indicated a relatively high reserve of the actual throughput capacity for the main motorized traffic flow in the analysed roundabout arm. The presented model represents a practicable and adaptable tool for planning the roundabout capacity in practice and for the sensitivity analysis of individual variables on the throughput capacity of the roundabout.
Ključne besede: roundabouts, traffic flow analysis, micro-simulation modelling, capacity analysis
Objavljeno: 05.06.2017; Ogledov: 94; Prenosov: 4
Polno besedilo (4,50 MB)
Reliability analysis of operation for cableways by FTA (fault tree analysis) methodSergej Težak
, Zdravko Toš
, Ivo Jurić
, 2010, izvirni znanstveni članek
Opis: This paper examines the reliability of the operation of cableway systems in Slovenia, which has major impact on the quality of service in the mountain tourism, mainly in wintertime. Different types of cableway installations in Slovenia were captured in a sample and fault tree analysis (FTA) was made on the basis of the obtained data. The paper presents the results of the analysis. With these results it is possible to determine the probability of faults of different types of cableways, which types of faults have the greatest impact on the termination of operation, which components of cableways fail most, what is the impact of age of cableways on the occurrence of the faults. Finally, an attempt was made to find if occurrence of faults on individual cableway installation has also impact on traffic on this cableway due to reduced quality of service.
Ključne besede: service quality, reliability, fault tree analysis, faults, quality, ski-tows, chairlifts, aerial ropeways, cableways
Objavljeno: 05.06.2017; Ogledov: 72; Prenosov: 2
Polno besedilo (653,93 KB)
Reduction of the roundabout capacity due to a strong stream of pedestrians and/or cyclistsTomaž Tollazzi
, 1999, izvirni znanstveni članek
Opis: Single-lane roundabouts may face the problems of getting crowded and empty in their circulatory roadway due to a strong stream of pedestrians and/or cyclists. Vehicles at the roundabout entries or exits have to provide the right of way over pedestrians and/or cyclists. Therefore, it comes to disturbances and traffic jams. If there are jams at the entry carriageway, vehicles are unable to get into roundabouts. If there are jams at the exit carriageway, vehicles are not able to leave the roundabout. When the length of vehicle platoon at the exits so long that it reaches the preceding entry, the roundabouts suffer from getting fully overcrowded. The paper presents the methodology of calculating the reduction of the roundabout capacity due to the pedestrian or cyclist stream. The method of calculating the reduction of the roundabout capacity with the disturbed streams may be used for roundabouts in urban environments, where the strength of the cyclist or pedestrian streams is not negligible.
Ključne besede: road traffic, roundabouts, roundabout capacity, traffic throughput, bicyclists, pedestrians
Objavljeno: 05.06.2017; Ogledov: 78; Prenosov: 3
Polno besedilo (1,66 MB)
Real capacity of ropeway transportation subsystemDrago Sever
, 2000, kratki znanstveni prispevek
Opis: The ropeway transportation system plays a major role in mountain resorts. In order to provide a sustainable development of the entire mountain resort system, the real capacity of the ropeway transportation system was set. The real capacity of the ropeway transportation system is one of the indicators of the development harmonisation level of single system elements. The research into this field was carried out at the Road Traffic Centre of the Faculty of Civil Engineering, University of Maribor. The paper deals with the basic points of the topic and the methods used. The know-how transfer of experiences into the Slovenian environment is presented together with the obtained results.
Ključne besede: traffic management, traffic, transport, ropeway, capacity
Objavljeno: 05.06.2017; Ogledov: 56; Prenosov: 2
Polno besedilo (2,01 MB)
Railway traffic management as a function of the new infrastructure managerDamjan Mlakar
, Drago Sever
, 2007, pregledni znanstveni članek
Opis: This article offers a survey of the current decentralised form of railway traffic management within the public railway infrastructure in the The Republic of Slovenia, which is the result of out-of-date and worn-out safety installations of railway stations and railway lines. The article presents a new model of railway traffic management as the basis for efficient activity and harmonization of railway traffic management in the The Republic of Slovenia to the systems of railway traffic management within EU. This article presents the advantages of a centralised system of railway traffic management and demonstrates that the application of this system can solve the problem of decentralized traffic management as a function of the new infrastructure manager.
Ključne besede: traffic management, centralization of railway traffic, traffic management centre, railway traffic management model
Objavljeno: 05.06.2017; Ogledov: 68; Prenosov: 2
Polno besedilo (3,23 MB)
Outsourcing logistics at petrol stations in SloveniaRatko Zelenika
, Darko Bečaj
, Helga Pavlić
, 2008, kratki znanstveni prispevek
Opis: The environmental disburdening by means of outsourcing logistics (sorting, bundling, transport) is today significantly more present, since this has been regulated by the law provisions on environmental protection and the economic reasons. Outsourcing logistics in this field with its activities such as: improvement in assembling separate fraction, introduction of new, i. e. additional boxes, usage of specific vehicles for collection and dispatch, reestablishment of information systems and organization of a centre for disburdening of the environment(sorting, bundling and waste disposal) is contributing largely to a better accomplishment of the mission of logistics rationalization and adaptation to new law claims on environmental protection.
Ključne besede: logistics, petrol stations, outsourcing logistics, environemntal protection, economics
Objavljeno: 05.06.2017; Ogledov: 58; Prenosov: 2
Polno besedilo (2,45 MB)
Statični izračun poslovno skladiščnega objekta z žerjavno progoSimon Šilih
, 2017, drugo učno gradivo
Ključne besede: jeklene konstrukcije, statična analiza, dinamična analiza, dimenzioniranje, Evrokod, industrijska hala, žerjavna proga, utrujanje materiala
Objavljeno: 05.06.2017; Ogledov: 71; Prenosov: 25
Polno besedilo (1,07 MB)
New type of roundabout: roundabout with “depressed” lanes for right turning - “flower roundabout”Tomaž Tollazzi
, Marko Renčelj
, Sašo Turnšek
, 2001, kratki znanstveni prispevek
Opis: Recently, many of the foreign traffic-safety analyses point out the low level of traffic safety in multi-lane roundabouts. This problem is resolved in several ways in different countries; however, the solution, whereby the number of conflict points is diminished (e.g. turbo roundabout) has proven to be the most successful. However, the turbo roundabout also has its deficiencies: it has conflict crossing points and larger reconstruction of the existing two-lane roundabout is needed when the turbo roundabout is to be implemented instead of the existing one. In the paper a new type of roundabout has been introduced; the roundabout with “depressed” lanes for right turning (“the flower-roundabout”). Financially speaking, the main advantage of the new type of roundabout is that it can be implemented within the dimensions of the already existing “normal” two-lane roundabout. From the traffic-safety point of view, the main advantage of the new type of roundabout is that it has no crossing conflict points.
Ključne besede: traffic safety, roundabouts, turbo roundabout, roundabout with "depressed" lanes for right turn
Objavljeno: 05.06.2017; Ogledov: 71; Prenosov: 2
Polno besedilo (896,59 KB)
New type of roundabout: dual one-lane roundabouts on two levels with right-hand turning bypasses - "target roundabout"Tomaž Tollazzi
, Goran Jovanović
, Marko Renčelj
, 2013, kratki znanstveni prispevek
Opis: The problems of low level traffic safety on multi-lane roundabouts have been resolved in various ways in different countries, usually by using alternative types of roundabouts that reduce the number of conflict points. Alternative types of roundabouts typically differ from "normal" or "standard" roundabouts in one or more design elements, as their implementation purposes could also be specific. Today, several different types of roundabouts are already in use ("mini", "double mini", "dumb-bell", those "with joint splitter islands" ("dog-bone"), those "with a spiralling circular carriageway" ("turbo"), those "with depressed lanes for right-hand turners" ("flower") etc.). This paper introduces a new type of roundabout, dual one-lane roundabouts on two levels with right-hand turning bypasses, namely the "target roundabout". This paper describes and analyses their design, traffic safety, and capacity characteristics, compared with the standard two-lane roundabouts.
Ključne besede: roundabouts, alternative types of roundabouts, turbo roundabout, target roundabout
Objavljeno: 05.06.2017; Ogledov: 48; Prenosov: 2
Polno besedilo (1,33 MB)