The invention presents a passive variable resistive voltage divider circuit with multiple series resistors and multiple output voltage taps in which the problem of large output resistance variation, depending on the output selection, is significantly improved. The circuit includes a voltage divider with at least three resistors in series, connected between voltage source connections, a switch network connected to divider output taps, and a variable resistance network in the output leads. The compensating resistance network in the output leads comprises the same resistance values as the main divider. The presented circuit allows selection of any combination of two output taps and significantly reduces the variation of output resistance by adjusting the variable compensation resistance in the output leads. One of the applications of the circuit is the calibration of measuring amplifiers by employing combinatorial calibration technique.
F.33 Slovenian patent
COBISS.SI-ID: 2201703The present invention is from the field of technology of materials and restoration and relates to use of water solution of calcium acetoacetate for the formation of calcium carbonate. More precisely the present invention relates to the use of water solution of calcium acetoacetate for consolidation of construction materials.
F.32 International patent
COBISS.SI-ID: 2211687The system for seismic risk assessment and earthquake preparedness has been upgraded. Seismic risk of 135 existing buildings has been assessed and related database ZAG enhanced. A daily model of buildings occupancy for different occupancy types has been developed, supported by different databases and calibrated with data obtained by a website survey. For municipal bridges the availability of data has been investigated and development of a methodology for seismic risk assessment is proposed. Portal “Earthquake Applications” has been established to provide access to all applications. Developed supporting models (damage to buildings, night and day occupancy of buildings, debris pile and burrial assessment) and available databases are included.
F.16 Improvements to an existing information system/databases
COBISS.SI-ID: 2271847The bridge across the Pavlovski potok stream in the village of Žerovinci in northeast Slovenia is a part of the investment into the modernisation of the Pragersko % Hodoš railway line, one of the biggest investments in the infrastructure in Slovenia at the moment. Its design was accompanied by very short deadlines and a deep layer of soft foundation soil. For this reason the reinforced concrete abutments of a nearby railway bridge were founded on 24 m deep piled foundations. Short deadlines and a limited budget forced the authors of this paper to find an alternative solution. Deep piled foundations were replaced by shallow foundations made of compacted fill material reinforced with geosynthetics. The bridge was completed by the end of 2014. From the results of previous laboratory tests that were obtained within the scope of the EU co-funded research project "Research voucher", the basic characteristics of the building materials for the geosynthetic reinforced soil (GRS) bridge abutments, as well as the deformation properties of the typical reinforced soil were obtained. These data were used for the design of the abutments. The staged construction procedure of full height rigid (FHR) facings for the GRS retaining walls (RW) was used for the construction of this GRS integrated bridge. Partial pre-stressing of geogrids and consequently the increased stiffness of the reinforced soil was achieved by following the staged construction procedure. The bridge system consisted of a cast-in-situ RC slab, which was placed on top of the GRS immediately behind the FHR facings, i.e. the bridge was constructed as a simply-supported slab supported by a pair of GRS abutments, without the use of bearings. Thus the described bridge across the Pavlovski potok combines two approaches for GRS integrated bridge design, one of which has been used in Japan (Tatsuoka et al., 2009), with full structural integration of the deck onto the pair of FHR facings, other being proposed by the FHWA (Adams et al., 2010), without full integration of the deck onto the GRS RWs. A system for the monitoring of structure performance was established in order to ensure optimization of this kind of structure. Data for this GRS integrated bridge, which were obtained during the construction works were compared to similar data obtained from the construction of a nearby railway bridge with reinforced concrete abutments. The comparison provides a good basis for future decisions when choosing the type of bridge abutments.
F.17 Transfer of existing technologies, know-how, methods and procedures into practice
COBISS.SI-ID: 2225255The railway infrastructure is a very important component of the worldʼs total transportation network. Investment in its construction and maintenance is therefore significant on a global scale. Up to now, some results of the life-cycle assessment (LCA) of open railway line, as well as railway bridges and tunnels, have been published, but detailed analyses of transition zones have not so far been performed. In railway networks, transitional zones are a critical area where the transition from open rail to solid bridge construction can cause significant settlements. The goal of these analyses was to compare two different types of track renewal methods for railway transition zones. In the first method, traditional cement stabilisation is used, whereas the second solution makes use of a geocomposite anchored by steel anchors. The paper presents some results from an environmental study for railway transition zones based on the demonstration case. The results of the performed LCA showed that, in the case of track renewal for transition zones by means of a geocomposite and anchors, the environmental impact is lower than in the case when cement stabilisation works are performed. Less extensive excavation works and thus lower quantities of used material are additional benefits.
F.04 Increase of the technological level
COBISS.SI-ID: 2213735