bluuebunny/crossref_metadata_2025_split huggingface dataset:
Methodology for the integrated assessment of design solutions for foundation pit fences based on the theory of active systems
Authors: Zheglova Yulia , Titarenko Boris 
Published: July 2020

Abstract
To automate the selection of design solutions for foundation pit fences, it is necessary to build an integrated mechanism. However, for the real construction projects with various engineering and geological conditions, there are many design solutions for foundation pit fencing that satisfy the calculations for the limiting conditions. A rather difficult task is the issue of optimizing various parameters that must be taken into account when developing a design solution, as well as evaluating various possible options and choosing the most appropriate need from them, not only in terms of cost, but also the safety of residents. The paper proposes a methodology for assessing design solutions for foundation pit enclosures based on the theory of active systems.
Anchoring devices for mounting reticulate catchers on rocky sections of roads
Authors: Lelikov Georgy , Prostakishin Dmitry 
Published: July 2020

Abstract
This paper discusses an important aspect of ensuring safety during construction work at height, as well as when installing protective elements that catch possible falling parts of the terrain, when it is adjacent to the roadway and other communication routes. The purpose of the field tests was to verify the stability of products on the terrain with the application of static and dynamic loads. The stability test was carried out during installation on different rocks and also different regions of the CIS countries. Dynamic tests simulating cargo stall at various factors, followed by researching the ways to stop the falls. Static tests were carried out using manual tension systems - tackles. Tests in the laboratory were carried out in order to determine the destructive load on the product. For this, a special test mold was made that simulated the natural conditions. All tests were carried out using anchoring devices of various sizes, as well as with different options for the installation depth and support of the anchor. During the tests, a number of features based on the design form were discovered. The results of laboratory tests are displayed in the table with data for all test samples. A comparison was made of the bearing characteristics. As a result of this work, both the positive and the negative aspects were identified, it was especially important that the question arose of the need to possess the necessary competencies for installing this type of device.
Maintenance of comprehensive safety of tunnel-type road interchanges
Authors: Ginzburg Alexander , Kachanov Sergey , Kozminikh Sergey 
Published: July 2020

Abstract
Numerous people, dead and injured as a result of road accidents at the tunnel-type interchanges proves that the measures, taken for prevention of emergency situations in tunnels are insufficient. At the same time, various monitoring systems are installed at such facilities, being not connected among themselves. So, they cannot reduce, but can even increase the consequences severity in case of emergency situation because of the inconsistency of joint operation of the automated control systems for safety and life support at the road interchanges of tunnel type. The analysis of possible types of threats for the road interchanges of tunnel type allows to conclude, that some adequate measures for ensuring their safety can be taken only with the use of automated systems of remote monitoring of the facilities condition, modern communication systems, organization of the proper training of specialists for complex safety of facilities as well as advanced trainings of designers in this sphere. The main causes of emergency situations at the road tunnel-type interchanges are considered to achieve this goal. The causes of insufficient efficiency of the existing technologies and technical means of ensuring complex safety of tunnels are also analyzed. The technology of complex safety of the road tunnel-type interchanges is developed and approved on the basis of the carried-out analysis and with the use of methods of systems analysis and the theory of experiment. Experimental studies were carried with the use of the theory of experiment and the use of certified measuring instruments. It was proved scientifically and confirmed experimentally, that the offered technology of complex safety of the road interchanges of tunnel type allows to reduce risk of emergency situations and people’s death in tunnels by more than 50%.
On the Nature of the Acoustic Oscillations in Gas Explosions
Authors: Polandov Iurii Kh. , Korolchenko Anton , Dobrikov Sergei 
Published: July 2020

Abstract
The possible existence of acoustic oscillations (oscillating combustion) in gas explosions in unclosed volumes is known. A significant increase in risks was confirmed, if it happens indoors, which makes studies in this direction relevant. But the solution to this problem has proven difficult for two reasons. First, the results of the experimental studies turned out to be reproducible with weak reliability. This circumstance takes place, despite the fact that the first classical experiments, resulting in acoustic oscillations during gas heating, date back to the 19th century. The second reason why research is difficult is that by now there are no reliable mathematical models describing the process of excitation and development of oscillating combustion in gas explosions. The gas explosion simulation using the example of cylindrical chamber with a diameter of 200 mm and a length of 1.5 meters and a window on the lateral surface. The chamber in the initial state is filled with propane-air mixture, which is ignited at the left end along the chamber axis. The validity of mathematical model was checked by comparing the results of the gas explosion development calculation in the tube with other known results obtained in the closed circular tubes.
Estimation of loads’ main statistics for hot materials silo
Authors: Maj Marek , Ubysz Andrzej 
Published: July 2020

Abstract
The paper presents a statistical description of the values of random variables of pressure and temperature as the most important loads on wall of silo, in which hot materials, such as cement, clinker, fly ash, and raw meal are stored. An attempt to statistically describe the pressure and temperature and their additive share in loads are clearly present in the standards and guidelines for reinforced concrete (RC) silo design. The authors conducted many experiments and measurements of pressure and temperature that impact on the silo walls. For example, in a silo for a hot cement, variable pressure and temperature of the silo wall were measured simultaneously. In this example, coincidence coefficients for temperature and pressure were calculated using many statistical methods. For the pressure, a statistical determination of characteristic values was proposed.
Determination of the scale factor in the physical modeling of reinforced concrete structures exposed to emergency loads
Authors: Korenkov Pavel , Chemodurov Vladimir , Manaenkov Ivan , Korenkova Olesia 
Published: July 2020

Abstract
The article proposes a solution to the problem of more accurately taking into account the influence of scale factors on the qualitative and quantitative indicators of the stress-strain state obtained by testing both individual structures and structural systems made of reinforced concrete. Methodical approaches to modeling tests for static and dynamic loads are considered, with the aim of taking into account the scale effects that occur during the manufacture of prototypes of models of individual structures and structural systems made of reinforced concrete. Comparative analysis estimated effect of different geometric proportions for free opera statically determinate beams and for a fragment of a monolithic reinforced concrete frame multistory buildings, experimental studies which were performed by the authors earlier. Analytical patterns were established to assess the impact of large-scale factors on the particular static and dynamic deformation of structures and structural systems of reinforced concrete. The results can be taken into account when conducting experimental studies of model reinforced concrete structures for dynamic emergency loads
Reliability of building structures in case of an air blast wave
Authors: Mkrtychev Oleg , Savenkov Anton 
Published: July 2020

Abstract
The analysis shows that the parameters of the air shock wave vary significantly and have a pronounced random nature. In general, in structural analysis, design parameters of the shock wave are random functions or random variables; therefore, the reaction parameters of the system under consideration will also be random. Then, fulfillment of certain conditions (for example, strength) is only possible with a certain probability, and the reliability of the system under consideration can be estimated using methods of building structures reliability, methods of mathematical statistics and probability theory. As a result, a probabilistic model of an air shock wave has been developed and the reliability of a free-standing wall has been estimated for random exposure parameters, as well as for random strength characteristics of materials. Based on the calculation results, it was concluded that the calculation of reliability using methods of mathematical and statistical probability theory makes it possible to bring the strength analysis of building structures closer to actual operating conditions.
On ignition of combustible material in a gas explosion in the premise
Authors: Korolchenko Dmitriy , Kh Polandov Iurii , Evich Andrey 
Published: July 2020

Abstract

Introduction. There are known cases of fires after gas explosions in domestic residential premises, exacerbating an already dangerous situation. Determining the conditions for the occurrence of such fires, as well as the process of behaviour of combustible materials during the short-term thermal effect of a gas explosion, allows us to hope for the possibility of reducing fire risks through research and the development of appropriate measures. Methods Experimental studies were carried out in a cubic chamber with a volume of 10 m3 filled with a propane-air mixture. Explosion pressure and video inside the chamber were recorded. To assess the magnitude of the effects of flame and combustion products of a gas explosion on combustible material, specially developed indicators with a sensitive element – sheet of paper. Results. The images of sensitive elements of indicators with the level of brightness after exposure to a flame and combustion products of a gas explosion are presented. Frames from a video camera installed inside the camera are also presented. Discussion. The conditions for ignition of combustible materials are: low heat capacity, position in the volume of premise and the entry of outside air. Conclusions. It is established that combustible materials in the corners of premise are less affected by the flame and combustion products of a gas explosion. Combustible material ignites when external air enters after an explosion.
Analysis of the accuracy of CPT and leading parameters methods to determination of the pile bearing capacity
Authors: Polańska Bernadetta , Szabowicz Hubert 
Published: July 2020

Abstract
The paper presents a comparison of various methods used to calculate the bearing capacity of columns and the results of static loads. In the first part of the article, the methodology for the calculation of the load bearing capacities based on CPT static probes and using leading parameters are presented. Next, the investment and the hydrogeological conditions in which the columns were made are described and then subjected to test loads. The results include a summary of the dependence of the length of the columns on their load bearing capacity calculated with three methods for two different CPT sounds. A comparison of the results of calculated settlement of the column head depending on the amount of force applied to them and the results from static loads is also provided.
Application of Synthetic Aperture Focusing Technique to visualize GPR data from reinforced concrete structures
Authors: Dinh Kien , Pham Tung T. , Nguyen Tu T. , Vu Hiep H. 
Published: July 2020

AbstractGround Penetrating Radar (GPR) has been proven to be the most effective technology for imaging and evaluating the condition of concrete structures. That said, this paper presents an algorithm to automatically visualize GPR data collected from reinforced concrete structures. Specifically, the algorithm is based on the synthetic aperture focusing technique (SAFT) and is executed with two GPR data sets collected in a perpendicular survey grid. In the first step, for each scan line in a data set, a B-scan is reconstructed from the corresponding raw data using the SAFT technique. In the second step, the linear interpolation is employed, for each data set, to generate missing information between B-scans and create a 3D image of the surveyed object. Finally, by retaining the maximum amplitude of each corresponding voxel in the two images obtained from the second step, a combined 3D model is created.
Interaction of shock waves with elastic-plastic medium
Authors: Khudainazarov Sherzod , Donayev Burxon , Abdimuminov Erkin , Suyunova Yulduz 
Published: July 2020

Abstract
The problem of spherical shock wave propagation in an elastic-plastic medium is solved analytically and numerically by the method of characteristics on the basis of the strain theory, including the generalized equations of state of the medium. The spherical shock wave propagation in an elastic-plastic medium with a more complex equation of state for the medium forming is studied. The results show that an account for nonlinear–elastic shock diagrams leads to an increase in circular stress wave compared to an elastic medium. It was found that the stress concentration is higher on the spherical cavity than on the cylindrical one.
Evolutionary-based optimization of steel moment frames using direct analysis method
Authors: Nguyen Tran-Hieu , Vu Anh-Tuan 
Published: July 2020

Abstract
Steel moment frames are widely used in multi-story buildings due to their advantages such as robust as well as flexibility in architectural planning. This paper proposes a design method of steel moment frames based on an optimization algorithm called Differential Evolution. In the optimization problem, the design variables are the cross-sections of the steel members while the objective function is the total weight of the frame. The frame is designed based on the direct analysis method which is specified in the ANSI/AISC 360-10 “Specification for Structural Steel Buildings”. A program, called FrameOpt, is developed using Visual Basic for Application language to implement the optimization algorithm. This program connects to the SAP2000 analysis program for the steel design through the open Application Programming Interface feature. An example is conducted to demonstrate the applicability of the proposed method.
Application of Building Information Modeling (BIM) for automatic integration of construction costs management information into 3D models in consideration of Vietnamese regulations
Authors: Quoc Toan Nguyen , Thi Thu Hang Nguyen , Nam Le Hoai , Hong Duyen Dang , Phuong Nam Tran 
Published: July 2020

Abstract
Some countries concentrate to study on BIM as an effective tool in quantities taking-off and costs estimating. In contrast, due to special features of Vietnamese law regulations, issues on BIM application for these works are still not considered properly in Vietnam. Therefore, in this research, the authors would like to review studies performed on BIM uses on these works in Vietnam, and to analyze the necessities and difficulties when using BIM for automatically taking off quantities and estimating construction costs, then to propose technology methods for addressing this issue. Two methods are proposed to automatically calculate construction works quantities and costs based on models designed in Revit, more specifically, the first one is using Keynote to develop a database on components codes and to establish the components schedule in Revit; the second is using Dynamo to develop connection nodes between Revit models and Excel Sheets, facilitating the data export from Revit to Excel, then using Excel to adjust data in consistency with models.
Mathematical and mental modeling for ecological reconstruction of the environment of construction objects
Authors: Slesarev Mikhail , Kovrigin Arthur , Kafanova Julia 
Published: July 2020

Abstract
It seems very timely and relevant mathematical and mental modeling for ecological reconstruction of the environment of construction objects because it is almost the first attempt to algorithmize, by analogy with artificial intelligence, the modeling processes for managing the activities of the decision-making Manager, and helps to algorithmize the decision-making processes by placing mental models in the conscious activity of the Manager, and mathematical models in his personal gadget for environmental reconstruction. For a simple case of ecological reconstruction, oral calculations are sufficient, or you can use a verbal (mental) model, in a more complex case, you will need a sheet of paper to analyze the problem problem, and in an even more complex case, you will need a computer for modeling, and finally, you can use a special optimization computer program. Any modeling is aimed at making adequate management decisions. Modeling using computer tools, including mobile gadgets (iPhones, smartphones, tablets, etc.) becomes a common stage in decision-making in all areas of activity, in managing any process and achieving the desired result. Therefore, the development of modeling methods and techniques, the principles of building mental and mathematical models, and the choice of means for their implementation, using modern software products, is of paramount importance today for supporting decision-making by a Manager, engineer, designer, designer, Manager, business analyst, etc. The problem of the innovation process in energy construction cannot be solved without using mathematical tools. The human brain is not able to predict all possible consequences of innovation in a timely manner, so forecasting and modeling the future and consequences of the innovation process requires simulation based on mathematical and mental modeling for its solution. Examples of models of ecological reconstruction of the environment of construction objects are given.
Research some key risk factors in construction
Authors: Thi Thu Nga Nguyen , Anh Tuan Nguyen 
Published: July 2020

Abstract
The construction investment project is a collection of activities related to abandonment, expansion or renovation to develop, maintain or improve the quality of work or product or service for a while. One of the main characteristics of a construction investment project is the uncertain environment (potentially high risks). According to the statistics of the Department of State Inspection of Vietnam about the quality of construction works every year, about 0.28% ÷ 0.56% of construction projects have problems. To account for the above issues, there are many reasons related to the investors, designers, contractors, even objective conditions. Therefore, the analysis and giving exact causes of risks are of very high practical significance, and this is also an important basis for devising measures to minimize harm or prevent risks happening. This paper, therefore, attempted to assess the current use of risk management in Vietnam construction projects by an empirical survey. However, within the scope of this paper, the authors conduct a survey to assess some main risk factors, thereby building a relationship between risk management and factors by questionnaires Combined with the statistical processing methods. At the same time, from a research perspective on risks, it is considered in terms of forecasts and is preventable.
Analysis of the current stage of reforming mechanisms for financing shared housing construction in Russia
Authors: Beliakov Sergei , Kapustkina Anna 
Published: July 2020

Abstract
In article the authors present the results of the analysis of the most significant changes in the system of financing investment and construction projects of housing, introduced as part of the transition to the mechanism of project financing, as well as the conclusions of the most important implications of the reporting changes during the implementation of the current stage of reform of financing mechanisms for shared construction in Russia. The authors present an integrated model of interaction between the subjects of shared housing construction, taking into account the allocation of functional subsystems that correspond to the main stages of implementation of investment and construction projects. On the other hand, according to the authors, the most significant changes concerning the radical transformation of the mechanisms for financing shared construction should be described as debatable. Moreover, discussion and ambiguity should be considered in two different aspects: the goal setting aspect and the implementation aspect. The degree of compliance of the actual results of the reform under consideration with the declared goals and its socio-economic effectiveness in General will be determined primarily by the realities of its practical implementation.
Method of evaluation the current state of municipal infrastructure for investment planning purposes
Authors: Nelyubov Artem 
Published: July 2020

Abstract
Nowadays the problem of the municipal infrastructure state is extremely important, both for the Russian Federation and for regions. Municipal administrations face deterioration of fixed assets, lack of available capacity and lack of funding for the development of existing infrastructure. The research is relevant because of insufficient elaboration of existing mechanisms of assessing the state of the city’s municipal infrastructure and the absence of a general tool for monitoring the current needs of fixed assets in the field of housing and communal services. In order to monitor the current state of the municipal infrastructure of the city and further decision-making on the financing of initiatives to modify it, a mechanism has been developed to assess the current state of the municipal infrastructure. The purpose of the study is to develop a mechanism for assessing the current state of public infrastructure systems. To achieve the objectives of the study were used such research methods as: the study of scientific literature and statistical information on the research topic, the analysis of the information, synthesis of information received, development of economic and mathematical models for assessing the current state of municipal infrastructure. The method of hierarchy analysis (T. Saati) and utility functions were used in the formation of integral performance. The result of the study is integral performance for assessment of the current state of the city’s municipal infrastructure. The results may be used in order to improve the quality of decisions in the field of housing and communal services management. In future, the results of the study can be used to develop an economic mechanism for investment planning for the development of municipal infrastructure in the city.