scholarly journals WEAR APPRAISAL OF MOVEMENT JOINTS’ STRUCTURES AND WAYS TO IMPROVE THEIR DURABILITY

2019 ◽  
Vol 10 (2) ◽  
pp. 126-132
Author(s):  
B. A Bondarev ◽  
T. M Zaytseva ◽  
A. G Saakyan ◽  
T. R Lezgiev
Keyword(s):  
Correct Choice ◽  
Head Part ◽  
Structural Elements ◽  
Damping Properties ◽  
The Road ◽  
Cyclic Durability ◽  
Weld Structure ◽  
Endurance Tests ◽  
Structure Disorder ◽  
Technical Solutions

Movement joints are one of the most important structural elements of bridge structure and represent gaps between end face of span structure and cabinet wall of support or head part of support. The durability of the structure as a whole depends largely on the correct choice and, then, the installation of the movement joints. The results of numerous technical surveys of bridges and overpasses show that the main defects and damages of movement joints structural elements are: weld structure disorder due to incorrect selection and installation; Formation of cracks in the zone of seams on the coating of different length and with different opening width. In addition to the above-mentioned defects, the formation of gauge due to differences in the marks of the bridge web at the joint of the road clothes and the movement joints plays a major role in the process of breaking the coating in the zone of movement joints. Destruction of coating in zones of movement joints in many cases is due to intensive gauge formation, at the same time, formation of wheels is due to difference of marks of road clothes and movement joints. To prevent colour formation in the zone of movement joints the following technical solutions are used: arrangement of pedestrian zones; Application of concrete tides (boundaries). In these zones it is recommended to arrange tides on the basis of polymer composite materials (PCM), having high damping properties and cyclic durability. Endurance tests and the study of damping properties were carried out according to conventional methods for polymer betons FAM and FAZIS-30. The values of the vibration decree for the above-mentioned materials and their cyclic durability are obtained.

METHOD OF DOMAIN ONTOLOGY AUTOMATED REPLENISHMENT FOR THE SUPPORT OF NEW TECHNICAL SOLUTIONS SYNTHESIS. PART I

2021 ◽  
pp. 3-12
Author(s):  
S. S. Vasiliev ◽  
D. M. Korobkin ◽  
S. A. Fomenkov
Keyword(s):  
Language Processing ◽  
Domain Ontology ◽  
Russian Language ◽  
Information Support ◽  
Structural Elements ◽  
Technical Object ◽  
Main Claim ◽  
Shallow Parsing ◽  
Technical Solutions ◽  
Alternative Designs

To solve the problem of information support for the synthesis of new technical solutions, a method of extracting structured data from an array of Russian-language patents is presented. The key features of the invention, such as the structural elements of the technical object and the relationships between them, are considered as information support. The data source addresses the main claim of the invention in the device patent. The unit of extraction is the semantic structure Subject-Action-Object (SAO), which semantically describes the constructive elements. The extraction method is based on shallow parsing and claim segmentation, taking into account the specifics of writing patent texts. Often the excessive length of the claim sentence and the specificity of the patent language make it difficult to efficiently use off-the-shelf tools for data extracting. All processing steps include: segmentation of the claim sentences; extraction of primary SAO structures; construction of the graph of the construct elements f the invention; integration of the data into the domain ontology. This article deals with the first two stages. Segmentation is carried out according to a number of heuristic rules, and several natural language processing tools are used to reduce analysis errors. The primary SAO elements are extracted considering the valences of the predefined semantic group of verbs, as well as information about the type of processed segment. The result of the work is the organization of the domain ontology, which can be used to find alternative designs for nodes in a technical object. In the second part of the article, an algorithm for constructing a graph of structural elements of a separate technical object, an assessment of the effectiveness of the system, as well as ontology organization and the result are considered.

scholarly journals Problems of transporting heavy containers by road transport in Russian Federation

2020 ◽  
Vol 2020 (1) ◽  
pp. 13-23
Author(s):  
Boris Sergeevich Petrov ◽  
Alexander Valentinovich Galin
Keyword(s):  
Russian Federation ◽  
Road Transport ◽  
Correct Choice ◽  
Total Weight ◽  
Transport Infrastructure ◽  
Maximum Mass ◽  
The Road ◽  
The Russian Federation ◽  
Axle Loads ◽  
Freight Vehicles

The article considers the problem of heavy cargo transporting as an integral part of functioning of industry in the country. The transportation of such types of cargo is regulated by the legislation related to the national transport infrastructure. There have been considered the ways of transporting heavy sea containers by road transport in the Russian Federation. Definitions of the divisible and indivisible cargo, the maximum mass of the road train have been given, the indicators of the maximum permissible mass of the vehicle and the axle load on the roads of Russia, approved by legislative acts of the Russian Federation, have been presented. The issues of the correct choice of freight vehicles and compliance with the rules for transportation of heavy cargo, in particular compliance with the permissible total weight and axle loads, have been considered. There has been proposed the method for calculating axle loads and the solution to the problem of redistributing axle loads by moving the seat of the towing vehicle, transporting a heavy sea container by train being used as the example. The obtained values make it possible to estimate the possibility of carrying heavy cargo without violating standards approved by the legislation of Russia

scholarly journals Influence of the Acoustic Cover of the Modular Expansion Joint on the Acoustic Climate in the Bridge Structure Surroundings

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2842
Author(s):  
Janusz Bohatkiewicz ◽  
Michał Jukowski ◽  
Maciej Hałucha ◽  
Marcin Dębiński
Keyword(s):  
Sound Level ◽  
Structural Elements ◽  
Expansion Joint ◽  
Expansion Joints ◽  
The Road ◽  
Sound Levels ◽  
Road Surfaces ◽  
Before And After ◽  
Bridge Structures

The noise generated at the interface between the wheels of vehicles and the road surface is well recognized in the literature worldwide. Many publications describe the phenomenon of reducing this kind of impact by silent road surfaces. A specific type of this noise is the sound generated by vehicles passing over the expansion joints of bridge structures. Due to the impulsive nature of this sound, it is very onerous for people living in the close vicinity of bridge structures. The passage of vehicles over expansion joints causes the formation of vibrations that are transmitted to the structural elements of bridge structures, which may cause the formation of the material sounds (especially arduous in the case of bridges with steel elements). An attempt to reduce this impact was made by making a prototype acoustic cover of the expansion joint on the selected bridge. The paper presents the results of research on the “in situ” acoustic effectiveness of this cover. Additionally, the noise was modelled in the object surroundings before and after the cover’s application. The acoustic efficiency of the cover in the whole measured frequency range was 5.3 dBA. In the narrower frequency bands (1/3 octave bands), larger sound level reductions were observed. The maximum sound levels measured under the tested dilatation were less than 10.0 dBA lower than the maximum sound levels measured under the reference dilatation.

scholarly journals Overview of approaches to driver fatigue recognition and existing technical solutions

2020 ◽  
Vol 1 (3) ◽  
pp. 48-58
Author(s):  
Ya.D. Saprykin ◽  
◽  
V.I. Ryazantsev ◽  
A.A. Smirnov ◽  
◽  
...  
Keyword(s):  
Traffic Accidents ◽  
Road Traffic ◽  
Physiological State ◽  
Steering Wheel ◽  
Driver Fatigue ◽  
The Road ◽  
Advantages And Disadvantages ◽  
Falling Asleep ◽  
On The Road ◽  
Technical Solutions

The article analyzes the existing methods for determining the driver's condition. Driving in a state of fatigue, according to various statistics, is the cause of a large number of road traffic accidents (RTA). The percentage of accidents in Russia associated with the driver falling asleep while driving in 2018 is about 20%, in the USA the number of accidents for the same reason reaches 100,000 per year. The aim of the work is to review existing approaches to recognizing driver fatigue and existing technical solutions in this area. The article discusses such approaches as fatigue recognition based on the physiological state of the driver, recognition based on the driver's behavior, namely his speech and visual signs while driving, fatigue determination based on the nature of the vehicle's movement on the road and based on the driver's actions on the controls, the approaches based on the subjective assessment of the driver's condition. The advantages and disadvantages of each of the approaches were analyzed. The paper also provides an overview of existing fatigue recognition systems from various manufacturers that are currently used on vehicles and are designed to warn the driver of impending fatigue. It was revealed that in modern conditions of road transport operation, the most optimal approaches to fatigue recognition are based on an assessment of the driver's impact on the steering wheel, visual signs of driver fatigue and the nature of the vehicle's movement on the road, therefore, it is proposed to further focus on these methods.

The Influence of Faulty 19th Century Technical Solutions on a Work of 18th Century Rafter Framing as Exemplified by Church in Nowy Kościół in Lower-Silesia, Poland - Case Study

2013 ◽  
Vol 778 ◽  
pp. 903-910 ◽  
Author(s):  
Krzysztof Ałykow ◽  
Magdalena Napiórkowska-Ałykow
Keyword(s):  
Technical State ◽  
Ageing Process ◽  
Structural Elements ◽  
Natural Ageing ◽  
Will Force ◽  
Technical Solutions ◽  
Original Construction ◽  
Lower Silesia ◽  
Made In

In this article the authors present a monumental rafter framing of a baroque church in Nowy Kościół Lower-Silesia, Poland. The rafter framing was built in the 18th century and it was repaired in the middle of the 19th century by adding some new structural elements. The authors have analyzed the original construction and the reinforced construction from the 19th century and they found some large destruction of particular elements. In the presented example, the rafter framing required immediate renovation at the time, on account of its very bad technical state. This bad condition resulted from the damage of structural elements during ineffective attempts of repair, which were made in the middle of the 19th century, and due to a natural ageing process and the destruction of materials. The authors of article suggest renovation of the structural elements by adding in new supporting elements to strength them, which will force modification of reinforced elements work. The authors suggest renovation in such a form, that the monumental character of rafter framing would be preserved.

Optimizing Power Consumption of the Electric Vehicle Traction

2015 ◽  
Vol 809-810 ◽  
pp. 1103-1108 ◽  
Author(s):  
Gabriel Popa ◽  
Ioan Sebeşan ◽  
Sorin Arsene ◽  
Răzvan Oprea ◽  
Claudiu Nicolae Badea
Keyword(s):  
Energy Consumption ◽  
Power Consumption ◽  
Electric Vehicle ◽  
Market Economy ◽  
Correct Choice ◽  
Running Time ◽  
The Road ◽  
Important Target ◽  
Railway System ◽  
Efficiency And Reliability

The study refers to optimizing energy consumption from electric trains, underground trains and electric locomotives. The actual requirements of the dynamic market economy are forcing the railway system to transform into a reliable alternative to the road and air traffic. From this perspective, the railways have to fulfill two key elements: Economical efficiency and reliability and to offer what the potential customer needs. One of the main elements is the respect of the timetables or (if possible) the decrease of the running times. The running time is the main referential, especially when it’s related to the power consumption. The optimization of the running times and the power consumption is the most important target for railway operators and depends on the correct choice of the drive regimes. Article deals with energy optimization from the perspective of traction. Analysis can be applied also to diesel railcars and diesel locomotives.

scholarly journals Technical solutions for working elements of machines for efficient compaction of soil

2018 ◽  
Vol 230 ◽  
pp. 01006
Author(s):  
Kazimir Glavatsky ◽  
Volodymyr Cherkudinov ◽  
Olexandr Posmitiuha
Keyword(s):  
Soil Compaction ◽  
Structural Elements ◽  
Initial State ◽  
Modular Units ◽  
Wide Range ◽  
Combined Action ◽  
The Creation ◽  
Technical Solutions ◽  
The Impact ◽  
Light Medium

The modernization of machines for compaction of soil on a modular basis has the following advantages: some of their structural elements (working equipment and working elements) can be performed as unified modular units, from which, depending on the technological requirements, it is possible to assemble the required configuration of the sealing machine; the initial state of the machine does not deteriorate, to which it is easy to return; the nomenclature of structural elements and machines in general decreases, as the machine can be completed with variable modules, which leads to an improvement in their quality. When consolidating the soil massive use static, dynamic and combined action on the soil in the form of rollers, vibro-and ramboards. Machines of the boottype are classified into light, medium and heavy, which determines the order of its application. It is obvious that the reduction of technology for the process of soil compaction is possible due to the creation of machines that can change the intensity of the impact on the soil in a wide range.

On the Road to Computer Assisted Compositions

1981 ◽  
Vol 10 (2) ◽  
pp. 133-148 ◽  
Author(s):  
Earl Woodruff ◽  
Carl Bereiter ◽  
Marlene Scardamalia
Keyword(s):  
Qualitative Analysis ◽  
School Age Children ◽  
Computer Assisted ◽  
School Age ◽  
Structural Elements ◽  
The Road ◽  
Composing Process ◽  
On Line ◽  
On The Road ◽  
High Level

Two studies are reported that explore the feasibility of computer assisted composition in helping school-age children handle high-level aspects of the composing process. The first study used a program featuring help in selecting structural elements to include in opinion essays. The twelve grade six students, serving as subjects in the study, reported that the program was helpful, but a qualitative analysis of their products suggests the intervention was too easily assimilated to a low-level “What next?” composing strategy. In an attempt to strengthen the intervention, the second study introduced a response-sensitive questioning procedure. Qualitative measures suggest the thirty-six grade eight students found this on-line intervention to be too intrusive. The two approaches to on-line facilitation are discussed, and lines for the future investigation of computer assisted composition for the novice composer are suggested.

scholarly journals Focusing on reducing the earthquake damage to facade systems

2011 ◽  
Vol 44 (2) ◽  
pp. 108-120 ◽  
Author(s):  
A. Baird ◽  
A. Palermo ◽  
S. Pampanin ◽  
P. Riccio ◽  
A.S. Tasligedik
Keyword(s):  
Earthquake Engineering ◽  
Low Cost ◽  
Modern Society ◽  
Design Guidelines ◽  
Economic Consequences ◽  
Structural Elements ◽  
Structural Components ◽  
Structural Skeleton ◽  
Technical Solutions ◽  
Resistance Structure

Earthquake engineering is facing an extraordinarily challenging era. These challenges are driven by the increasing expectations of modern society to provide low-cost, architecturally appealing structures with high seismic performance. Modern structures need to be able to withstand a design level earthquake with limited or negligible damage such that disruption to business be minimised because of the economic consequences of such downtime. Technological solutions for seismic resisting structural systems are emerging. However, within the goal of developing a seismic-resisting building, not only the structural skeleton of the building but the entire system must be fully protected from damage. This includes the non-structural components of the building such as the claddings, ceilings and contents. Substantial studies are still required to develop technological solutions and design methods capable of achieving such an earthquake resistance structure. This paper presents a review of current technology for facades, including design guidelines for seismic-resistant non-structural components and the steps made towards a performance-based design framework. Alternative conceptual strategies and technical solutions to reduce the damage to non-structural elements will also be introduced.

scholarly journals ENDURANCE OF CARCASS TYPE POLYMER COMPOSITE MATERIALS AT DEFORMATION JOINTS OF BRIDGE STRUCTURE’S ELEMENTS

2020 ◽  
Vol 11 (3) ◽  
pp. 29-40
Author(s):  
B. A Bondarev ◽  
A. O Korneeva ◽  
O. O Korneev ◽  
A. G Saakyan ◽  
I. A Vostrikov
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Building Materials ◽  
Polymer Composite Materials ◽  
Matrix Composition ◽  
Polymer Concrete ◽  
Asymmetry Coefficient ◽  
Cycle Asymmetry ◽  
Cyclic Durability ◽  
Endurance Tests

Numerous studies of road surfaces in the areas of deformation joints of bridges and overpasses have shown that the use of polymer composite materials can significantly reduce cracks and destruction. The cyclic durability of such materials prevents rutting in the zone of deformation seams, due to their damping properties. Effective building materials based on furfural acetone monomers (FAM) are used for the manufacture of tides that experience cyclic impacts of vehicle wheels. Therefore, tests were conducted on the endurance of FAM polymer concrete under the influence of cyclic application of load. Today cyclic and static durability of traditional FAM polymer concretes has been studied in detail. However, the carcass technology can improve the characteristics of polymer concrete, in particular, reduce shrinkage. These polymer concretes are produced in two stages. First, a carcass is created from the filler grains glued together, and then the voids are filled with a matrix composition. This article presents the results of endurance tests of polymer concrete made using carcass and traditional technologies, with the same set of raw materials. To determine the limit of endurance, we used the method of planning an experiment with the construction of an orthogonal-composite plan of the second order. The cycle asymmetry coefficient and loading level (as a percentage of the destruction load) were selected as variable factors affecting the cyclic durability. Lines of fatigue strength of traditional polymer concrete FAM and obtained by carcass manufacturing technology at different values of the cycle asymmetry coefficient are also constructed. The results of endurance tests under the influence of repeated application of load showed that the polymer composite material based on furfural acetone monomer, obtained by carcass technology, has an increased cyclic durability compared to traditional polymer concrete.

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