bluuebunny/crossref_metadata_2025_split huggingface dataset:
Parametric vibrations of viscoelastic orthotropic cylindrical panels of variable thickness
Authors: Normuminov Bakhodir , Abdikarimov Rustamkhan , Mirsaidov Mirziyod , Khodzhaev Dadakhan , Mirzaev Bakhadir 
Published: July 2020

Abstract
In modern engineering and construction, thin-walled plates and shells of variable thickness, subjected to various static and dynamic loads, are widely used as structural elements. Advances in the technology of manufacturing thin-walled structural elements of any shape made it possible to produce structures with predetermined patterns of thickness variation. Calculations of strength, vibration and stability of such structures play an important role in design of modern apparatuses, machines and structures. The paper considers nonlinear vibrations of viscoelastic orthotropic cylindrical panels of variable thickness under periodic loads. The equation of motion for cylindrical panels is based on the Kirchhoff-Love hypothesis in a geometrically nonlinear statement. Using the Bubnov-Galerkin method, based on a polynomial approximation of deflections, the problem is reduced to the study of a system of ordinary integro-differential partial differential equations, where time is an independent variable. The solution to the resulting system is found by a numerical method based on the feature elimination in the Koltunov-Rzhanitsyn kernel used in the calculations. The behavior of a cylindrical panel with a wide range of changes in physico-mechanical and geometrical parameters is investigated.
Progressive collapse behaviour of compressed-bent rods of RC moment frames at sudden column removal
Authors: Savin Sergey 
Published: July 2020

Abstract
Due to the increasing incidence of disproportionate destruction of structural elements after the sudden removal of any supporting element, the number of studies of the resistance of structural systems to progressive collapse has grown significantly. However, among the research results presented in the scientific literature, there are practically no such studies in which an analysis of the resistance of compressed and compressed-curved reinforced concrete elements to disproportionate destruction would be performed. Therefore, in this paper, using the step-iteration method (Lira-CAD software) and non-linear stability analysis, we analyzed the behavior of the frame model when the column of the outer row was suddenly removed. In order to solve this problem, the analytical dependences are obtained for evaluating the stiffness of sections of compressed and compressed-curved elements. It has been established that the disproportionate fracture mechanism of compressed-bent elements of frame model is associated with a loss of stability.
Possible measures to reduce uneven deformation of floor structures of warehouse complexes
Authors: Rytova Tatyana , Rytov Sergey 
Published: July 2020

Abstract
The article discusses measures to reduce uneven deformation of floor structures of warehouse complexes. The main goal was to identify ways to reduce the unevenness of sediment in the floors of the warehouse. To obtain optimal reinforcement of the floor structure of warehouses, to reduce unevenness of floor sediments, two methods are used: increasing the rigidity of floor structures and (or) increasing the rigidity of the base due to the use of piles or its reinforcement. This article presents the experience of applying the technology for converting the construction properties of soils using crushed stone reinforcing elements (vibro stone columns) when installing floors in warehouses. This technology allowed to reduce the deformation of the base of the floors, to reduce their reinforcement.
Diagram of concrete dynamic deformation confined by CFRP jackets
Authors: Ubysz Andrej , Zhiharev Fedor , Chernik Vladimir , Dekhterev Denis 
Published: July 2020

Abstract
A review of the current state of the issue of describing the deformation of columns confined by CFRP jackets under of dynamic loading is carried out. The insufficiency of the study of elements under the influence of axial dynamic load is indicated. The dynamic increase factors (DIF) for concrete and CFRP, which are obtained by the results of existing experiments, are substantiated. Using the principle of the invariance of the potential energy of deformation of concrete at the time of its destruction under regime loading, a formula is obtained for determining DIF for ultimate relative strain of unconfined concrete. Based on the assumption of the same law of concrete deformation under static and dynamic loading, was obtained a diagram of concrete dynamic deformation confined by CFRP jackets. The diagram is valid in the range of strain rates 10−3-102 s−1. A comparison is made between a static diagram and a dynamic diagram derived from it. The characteristic of the main sections of the diagram is given. An increase in the strength and ductility of confined concrete at the initial stage of loading is obtained. At stresses equal to the tensile strength of limited concrete, its ductility is somewhat reduced. It was revealed that a significant increase in the bearing capacity of confined concrete begins at strain rates of 10 s−1 or more.
A numerical method for calculating round slabs based on generalized equations of the finite difference method
Authors: Uvarova Natalia , Turbinov Andrey 
Published: July 2020

Abstract
Round slabs are widely used in construction equipment. Currently, many different special structures are being built that have a circular shape in the plan. The article provides an analysis of thin isotropic circular slab in pure bending, the action of concentrated forces and slab loaded by a distributed load, supported at the centre. Different boundary conditions are considered. The initial differential equations of slab bending in polar coordinates are approximated by generalized equations of the finite difference method (MCR). The algorithm allows you to take into account the final discontinuities of the desired function, the right part of the original differential equations, as well as discontinuities of derivatives of these functions without thickening the grid and using contour points. It should be noted that for the Central point of the plate, differential bending equations and their numerical approximation in Cartesian coordinates are used, which makes it possible to determine the forces and movements at this point at any load.
The calculation algorithm is reduced to solving a system of differential-algebraic equations composed for field and contour points. The results of the calculation of slabs for these effects are presented. The reliability of the solution is confirmed by the convergence of results on some grids when the step is reduced, by comparing some solutions with existing ones, and by performing static checks. The advantage of this method is the ability to implement solutions with a small number of partitions.
Determination of the dynamic coefficient by the local damage of the element of steel trusses
Authors: Berger Maria , Tusnin Alexandr 
Published: July 2020

Abstract
An important role in the robustness analysis of damaged structures, is played by time during which local damage of the elements of the system occurs. Numerical studies have shown that the shorter the failure time of a particular farm element, the greater the dynamic forces arising in the structure. The time from the beginning of destruction to the complete failure of an element, which consists either in destruction or in loss of stability, is called the time of exclusion. The article describes the results of a series of numerical calculations of steel trusses as part of the building frame with local damage of individual truss elements. The influence of the time of exclusion of the element and the location of its damage on the value of dynamic coefficient was studied. The frame of the building is considered as a space frame, including not only trusses with local damage and the columns on which it relies, but also neighboring trusses, columns, bracing and purlins. This approach allowed to study the effect of local damage on the behavior of intact bearing structures. Based on the calculations, dynamic factors were established for the load acting on the truss with local damage and for the load on adjacent structures of the space frame. Recommendations are offered on constructive measures to increase the robustness of a building with steel trusses. The most unfavorable options for local damage of the trusses have been established. Recommendations are given on the assignment of dynamic coefficient for conducting a static calculation that takes into account the dynamic effects in the building frame with local damage of the truss.
Elimination of polarization effect in DC measurement of resistivity of CNT-cement composites
Authors: Tamov Murat , Pochinok Vladimir , Tabagua Georgiy R , Tamov Mukhamed 
Published: July 2020

Abstract
Multi-walled carbon nanotubes (CNT) may serve as electrically conducting fillers for traditional cement-based materials. Introducing small amount of CNT in the matrix of concrete turns the latter into a smart piezoresistive material applicable for the structural health monitoring of reinforced concrete structures. CNT–cement composites are subject to polarization during direct current (DC) resistance measurement. This phenomenon results in increase of electrical resistance of composites hindering their practical application. Suggestions for dealing with polarization usually include using alternate current measurements or applying direct current until resistance readings stabilize. This paper presents simple two-probe resistance sensing technique with DC being applied to the specimens as single square waves. Suggested approach is experimentally validated on the samples of CNT–cement composites. No polarization was observed in tested specimens when the periods between measurements were larger than 3 min. Such frequency of measurements is quite acceptable for monitoring the stress state of structures under static loading.
Intensity factors of homogeneous boundary value problem in angular area of the domain
Authors: Frishter Lyudmila 
Published: July 2020

Abstract
A relevant task in terms of ensuring reliable functioning of structures and constructions is studying structural areas with complex boundary shapes. Areas with geometrically non-linear shape of boundaries – angular cut-outs, cuts, and element connections with rupturing forced deformations – are characterized by singularities of the stress-strain state. In experimental research of areas with complex boundary shapes one must take into account the difference between stress intensity factors and deformation intensity factors. This paper describes a procedure for obtaining the stress-strain state in neighborhood of the angular cutout apex on the domain boundary using stress intensity factors and deformation intensity factors for a variety of homogeneous boundary conditions. In the angular cut-out area on the domain boundary, the stress-strain state is characterized by limit values of stresses and deformations, similar to stress intensity factors used with force criteria in fracture mechanics. Taking into account the ratios of stress and deformation intensity factors in experimental analysis of the stress-strain state in angular areas of structures is practically relevant for determining critical values of stress and deformation intensity factors.
Analysis of the reaction of reinforced concrete buildings with a varying number of stories with a seismic isolation sliding belt to an earthquake
Authors: Mkrtychev Oleg , Mingazova Salima 
Published: July 2020

Abstract
This article deals with the application of an active seismic protection system in the form of a seismic isolation sliding belt at the foundation level to ensure the seismic stability of a building or a structure. The type of seismic protection studied in this paper is simpler in design, cost-effective, and at least as efficient as widely used metal-rubber supports (MRS). Currently, the considered seismic isolation system does not have an adequate mathematical model to describe its operation in the building-seismic isolation-foundation-base system. The efficiency of using a seismic isolation sliding belt to ensure seismic stability of a structure was studied as exemplified by a cast in-situ reinforced concrete building with a varying number of stories (three-story, five-story, nine-story, sixteen-story building). As a result of the calculations, the relative displacements and accelerations and the intensity of stresses in the most loaded structural element were obtained. The analysis of the obtained results shows the efficiency of using a seismic-insolating sliding belt at the foundation level to ensure the seismic stability of buildings and structures.
Effectiveness of tuned mass damper system for steel frame building
Authors: Binh Pham Thanh , Tu Nguyen Van 
Published: July 2020

Abstract
The paper presents the analysis of using tuned mass damper system for reducing the response of structure subjected to lateral force, such as earthquake action. The assumed steel eight-story steel frame building is examined. The tuned mass damper system is modeled as 2 joint link in SAP2000, attached to top story of the building. The effect of tuned mass damper system for building under seismic excitation was evaluated by the results of maximum displacement and acceleration of the building. A sensitivity study was also performed to compare the structural response with different mass ratios. From the calculated results, discussions and conclusions are presented.
Decision making with visualizations: a cognitive framework for quality management in construction
Authors: Ivanov Nikolay 
Published: July 2020

Abstract
In conditions with unstable economy and a constantly increasing competition in the construction market, one of competitive advantages and factors of organization’s sustainable development is the existence of an effective QMS based on a risk-oriented approach for decision-making. Risk management is a process that is very important for construction industry enterprises and organizations. Each organization decides for itself how this process should be implemented. But in any case, an integral part of the process is the decision-making stage, which is most often representing a mechanism for managing corrective and preventive actions (CAPA). Analysis of various sources dedicated to the theory and practice of CAPA showed that several stages of the CAPA process cause difficulties for employees of quality management services of construction organizations. This article presents the author’s approach to a collecting and analyzing data stage implementation on detected inconsistencies and their root causes and as well as an implementation for stage of a list of corrective actions creation. The author proposes the concept of cognitive management of nonconformities based on visualization of data on nonconformities and their causes. The main result of the presented study is the nonconformity management technique aimed at improving the efficiency of the quality management system as a factor in sustainable development and increasing the competitiveness of Russian construction organizations.
Resistance enhancement of construction project organizational structure
Authors: Morozenko Andrey 
Published: July 2020

Abstract
This article integrate scientific studies in sphere of construction company organizational structure’s performance assurance in conditions of sharp and off-design changes of external and internal environment parameters. Organisational structure resistance is observed as a one of the most important properties of counteracting destructive effects of the external and internal environment. Objective and comprehensive description of resistance elements (reliability, durability, stability) is given. The paper substantiates a proposal to consider these organizational structure qualities from the standpoint of information science and the resource-based approach. This article particularly considers the question of organization structural stability, when its resistance is determined mainly by the organizational structure topology and not just by the qualities of system elements. This paper extends horizons of research and its borders, within which the organizational structure is able to implement its target function, release from particular resistance factors when analysing organizational structure and base on presented general approach. At the same time the paper does not renounce the studies of particular environmental factors impact on the organizational structure ability to resist their destructive effects.
Estimating the construction schools cost in Ho Chi Minh City using Artificial Neural Network
Authors: Dinh Cong Tinh , Nguyen Minh Quang 
Published: July 2020

Abstract
Construction cost is considered as one of the most important criteria in making decision for investment, especially in the idea formation stage. The paper provides a tool to determine the construction cost of the school during the conceptual design phase, when project information is still sketchy, not detailed yet. This research use artificial neural network techniques for estimating the construction schools cost. The model is based on the weight which set by the excel algorithm and the weight optimization method of the error back propagation. The excel algorithm is tested and optimized by using Statistical Package for the Social Sciences software. The basic model achieves accuracy 90.1% and the optimal model achieves 96.6% accuracy optimization. The optimal weight is used to build the cost estimation model with the automatic calculation program by the excel spreadsheet, which allows for updating the data value limited, updating weight when were adjusted.
Analysis and visualisation of stakeholder relationship in Offsite construction: Social Network Analysis approach
Authors: Ngoc Nguyen Bao , London Kerry A , Zhang Peng 
Published: July 2020

AbstractWhile Off-site construction has emerged recently, its benefits have long been proved worldwide. Many hold that Off-site construction is re-structuring the industry, its supply chain and setting supplementary standards. Although stakeholder theory is prevailing in project management research, there is still a lack of in-depth research upon patterns of interrelationship and communication among Off-site construction stakeholders. Given that in Off-site construction project-based organisations are multi-level structures, stakeholders interact with each other not only within-level but also cross-level. To facilitate the adoption and diffusion of Off-site construction, there is a need to address patterns and find out the optimal mechanism for promoting inter-collaboration. Social Network Analysis is presented as a holistic approach to meet that need in a more quantitative and unambiguous way. Based on a critique of Off-site construction literature and Social Network Analysis theory, a conceptual framework is also proposed for Off-site construction stakeholder research themes and corresponding methodology. The aim of this paper is to contribute to a sound theoretical foundation for the development of a social network model and the understanding of the complex of connection and relationship among Off-site construction stakeholders.
Capital mobilization solutions for revenue increase of road transport infrastructure development in Viet Nam
Authors: Thi Tuyet Dung Nguyen , Phan Liên Trang Vương , Hùng Bùi Mạnh , Thị Tuyết Phạm 
Published: July 2020

Abstract
Road system play important role in socio-economic infrastructure. It should be prioritized and invested at a fast and sustainable pace, thus creating a premise for socio-economic development, ensuring national defence and security, and serving the industrialization and modernization process of the country. In recent years, many policies for investment capital mobilization of road traffic development are issued by Vietnamese government (such as diversification of investment capital, investment encouragement in public-private partnerships form, foreign direct investment and investment of private sector). However, the annual capital only meets more than 54% of demand. Based on the analysis of the current status and needs of capital for road construction, in this paper the author has proposed solutions to attract capital from the utilization of road transport infrastructure to sustainably develop the road system in Vietnam.
Analyzing the impact of accessibility on property price by using hedonic-price modelling for supporting urban land management towards TOD in Hanoi, Vietnam
Authors: Thanh Mai Nguyen Thi , Mai Chi Nguyen Thi 
Published: July 2020

Abstract
Land and property price are determined by a number of characteristics, such as house-related characteristics and neighborhood-related characteristics. Accessibility to urban services and infrastructure is considered as an attribute group with a strong influence on this value. These impacts are diverse and complex, inconsistent, depending on each case study. The paper desires to use the linear regression method to evaluate the impact of accessibility to urban services and transportation on property prices in Hanoi. Some models were set up based on our assumptions on the relationship between accessibility-related attributes and estimated for 4 zones in the south of Hanoi and use them to compare the differences among these zones. Conclusions about the relationship between property prices and accessibility to transit, car-accessibility and accessibility to public amenities will help to enhance many ideas in managing land development in new centers established from Urban Mass Rapit Transit (UMRT) interchanges under the TOD concept - compact development, mixed land use, and easy accessibility.
Organizational and technological sequence of the construction of an innovative type of hinged ventilated facade of a multi-storey building
Authors: Oleynik Pavel , Korchagina Yuliya 
Published: July 2020

Abstract
Introduction: Systems of insulation and decoration of external walls in the format of hinged ventilated facades have an increasingly significant impact on the achievement of consumer and functional quality indicators for architectural (structural, construction) systems of multi-story civil buildings. The achieved variety of constructive solutions, materials and methods of construction requires a meaningful system organization based on multi-criteria assessment of technological methods of design, manufacture and construction.
Materials and methods: a systematic analysis factors, generally accepted theoretical and applied research methods (analysis, systems approach, generalization) aimed at applying modern knowledge to achieve practical goals and solve specific problems of building.
Results: Description of the main features of the innovative facade system. Methods for ensuring the conditions for structural strength, durability and environmental sustainability ventilated facade.