MONITORING OF TECHNICAL STATE OF STRUCTURES OF BUILDINGS WITH RUSTING SOIL FOUNDATION

2012 ◽  
Vol 2 (3) ◽  
pp. 76-79
Author(s):  
O. N KOTKOVA
Keyword(s):  
Physical Properties ◽  
The State ◽  
Technical State ◽  
Building Structures ◽  
Ability To Work ◽  
Limited Ability ◽  
Industrial Buildings ◽  
Soil Foundation

In most industrial buildings damaged in the building structures are due to violations of the properties of the subsoil. Changes in the physical properties of the soil leads to deformation aboveground structures, the state of which the examination can be viewed as a limited ability to work or even crash.

INVESTMENT AND BUILDING INDUSTRY AS A GUARANTEE OF INCREASING THE LIVING STANDARD OF THE POPULATION AND THE FOUNDATION OF SOCIO-ECONOMIC SECURITY OF THE COUNTRY

2021 ◽  
Author(s):  
Volodymyr Savchenko ◽  
Serhii Stoika ◽  
Oleg Makliuk
Keyword(s):  
Financial Incentives ◽  
Legal Framework ◽  
Economic Security ◽  
The State ◽  
Living Standard ◽  
Regulatory Function ◽  
Special Importance ◽  
Building Structures ◽  
European Standards

The situation in the construction complex of the state and crisis phenomena in it are shown. It is proposed to return to the basic components of system management of the industry, lost due to spontaneous pseudo-market processes. Problems that need to be overcome are systematized, they are the following: attracting investments, increasing effective demand in the domestic market, strengthening the competitiveness of production, the predominance of innovative technologies, increasing the quality of products and facilities, bringing the legal framework to European standards, training of employees and managers. The state of the housing market, the importance of its openness, transparency, systematization and regulation are described. The special importance of the regulatory function of the state in the current situation is pointed out. The importance and role of comprehensive activities for housing construction economic growth is emphasized. The need to create conditions for increasing the volume of products sold under international agreements through investment and interstate projects is noted. The relationship between the results of the construction industry and the effective use of human capital is given, for which each company needs measures to improve work with staff, improve their skills, financial incentives and social security. The expediency of introducing the mechanism of energy service in construction, which is part of the management system with subsystems of planning, organization, regulation, motivation and control, is proved. The role of methods for evaluating the effectiveness of innovative activities of enterprises to ensure quality and effective management of production processes is analyzed. The information on development schemes of the organization at registration of the allowing documentation, financing, designing, market research, selection of participants, accounting, construction, property management is provided. The function of settlements' territories as separate objects at construction of inhabited premises is defined. Award on the need for construction and reconstruction of "sleeping" areas in cities, which requires significant investment, development of building structures, as well as established close relationships with industrial, commercial, cultural, entertainment and other facilities.

Assessment of the Cement Plate Building Covering Facade

2019 ◽  
Vol 808 ◽  
pp. 27-32
Author(s):  
Miloslav Novotný ◽  
Miloslav Novotný ◽  
Karel Šuhajda
Keyword(s):  
Czech Republic ◽  
Physical Properties ◽  
Visual Assessment ◽  
The State ◽  
Test Method ◽  
Flat Plates ◽  
Limit Values ◽  
The Czech Republic ◽  
Mechanical And Physical Properties ◽  
Outer Cladding

The article deals with the methodology of the assessment of the state of the external facade of the outer cladding façade from the fiber cementitious boards in view of meeting the conditions of the technical legislation valid in the Czech Republic. On a particular case, the methodology of the procedure from the visual assessment of the facade facing plates to the requirements of their mechanical and physical properties is described. The object under consideration is a civic building in a climatically challenging location in the Beskydy foothills, whose facade is completely lined with fiber-cement boards. The assessment is based on the provisions of ČSN ISO 13822 (73 0038): Design principles for structures - Evaluation exists. construction and ČSN P 74 7251: 2015 Folded cladding, tiles and panel cladding - Requirements for casting accuracy, quality and appearance. For the assessment of mechanical and physical properties, the provisions of ČSN EN 12467 - Fiber-cement flat plates - Specimen specification and test method are used. Limit values ​​of individual parameters are taken into account in the technical sheets of the manufacturer of fiber-cement boards.

scholarly journals Soil Electrochemical and Physical Properties in Coffee Crops in the State of Paraná, Brazil

2020 ◽  
Author(s):  
Cezar Francisco Araujo-Junior ◽  
Vinicius Cesar Sambatti ◽  
João Henrique Vieira de Almeida Junior ◽  
Henrique Hiroki Yamada
Keyword(s):  
Physical Properties ◽  
The State

Physical, Petrographic, and Mineralogical Properties of Limestone Rocks from the Peninsula of Yucatán

2012 ◽  
Vol 1373 ◽  
Author(s):  
J. May-Crespo ◽  
P. Quintana ◽  
J. J. Alvarado-Gil ◽  
B. A. Juárez de la Rosa ◽  
A. May-Pat ◽  
...  
Keyword(s):  
Physical Properties ◽  
The State ◽  
Building Construction ◽  
Science And Engineering ◽  
Mineralogical Properties ◽  
Different Types ◽  
Limestone Rock

ABSTRACTKnowledge of the mechanical and petrographic properties of limestone rocks is an important issue to different areas of science and engineering. Sedimentary limestone rock is one of the most abundant materials in the Peninsula of Yucatán used for decorative and building construction. This work studies the petrographic, mineralogical, and physical properties of three different types of limestone slabs of the state of Yucatán.

Instantaneous Stochastic Optimal Control of Seismically Excited Structures Based on Time Domain Explicit Method

2013 ◽  
Vol 790 ◽  
pp. 215-218
Author(s):  
Xue Ping Li ◽  
Chao Yu ◽  
Jie Yang Zhang ◽  
Jing Jie Zhou ◽  
Lin Ming Zhang
Keyword(s):  
Optimal Control ◽  
Time Domain ◽  
Stochastic Optimal Control ◽  
The State ◽  
Control Force ◽  
Building Structures ◽  
Explicit Method ◽  
Plane Shear ◽  
Shear Structure

A new instantaneous stochastic optimal control (ISO) for the linear building structures subjected to non-stationary random excitations is proposed. A plane shear structure is taken as the example to illustrate the proposed method. The main advantage of the method is that the control force is easy to be calculated because the expression of the control force is independent of the state of the system.

NONCLASSICAL EFFECTS OF THE STATES GENERATED BY EXCITATIONS ON A COHERENT STATE OF A HARMONIC OSCILLATOR IN A FINITE-DIMENSIONAL HILBERT SPACE

2005 ◽  
Vol 19 (16) ◽  
pp. 779-784
Author(s):  
YUAN-XING LI ◽  
QIN-MEI WANG ◽  
JING-BO XU
Keyword(s):  
Hilbert Space ◽  
Coherent State ◽  
Harmonic Oscillator ◽  
Physical Properties ◽  
The State ◽  
Photon Statistics ◽  
Finite Dimensional ◽  
Dimensional Hilbert Space ◽  
Finite Dimensional Hilbert Space

The mathematical and physical properties of the states which are generated by excitations on the coherent state of a harmonic oscillator in a finite-dimensional Hilbert space are studied. It is shown that the state exhibits squeezing in one of the quadratures of the field and sub-Poissonian photon statistics.

scholarly journals Quasicrystals: What do we know? What do we want to know? What can we know?

2018 ◽  
Vol 74 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Walter Steurer
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Structure Analysis ◽  
Self Assembly ◽  
State Of The Art ◽  
The State ◽  
Growth Mechanisms ◽  
Dan Shechtman ◽  
Big Picture ◽  
Quasicrystal Structure

More than 35 years and 11 000 publications after the discovery of quasicrystals by Dan Shechtman, quite a bit is known about their occurrence, formation, stability, structures and physical properties. It has also been discovered that quasiperiodic self-assembly is not restricted to intermetallics, but can take place in systems on the meso- and macroscales. However, there are some blank areas, even in the centre of the big picture. For instance, it has still not been fully clarified whether quasicrystals are just entropy-stabilized high-temperature phases or whether they can be thermodynamically stable at 0 K as well. More studies are needed for developing a generally accepted model of quasicrystal growth. The state of the art of quasicrystal research is briefly reviewed and the main as-yet unanswered questions are addressed, as well as the experimental limitations to finding answers to them. The focus of this discussion is on quasicrystal structure analysis as well as on quasicrystal stability and growth mechanisms.

scholarly journals XIX. On the optical and physical properties of tabasheer. By David Brewster, LL. D. F. R. S. Lond. and Edin. In a letter to the Right Hon. Sir Joseph Banks, Bart. G. C. B. P. R. S. &c. &c. &c

1819 ◽  
Vol 109 ◽  
pp. 283-299 ◽  
Keyword(s):  
Natural History ◽  
South America ◽  
Physical Properties ◽  
The State ◽  
The West ◽  
Siliceous Earth ◽  
The Right ◽  
Interesting Account

My Dear Sir, The substance called Tabasheer, has been long used as a medicine in Turkey, Syria, Arabia, and Hindostan. It was first made generally known in Europe by Dr. Patrick Russell, who published in the Philosophical Transactions, for 1790, a very interesting account of its natural history, and of the process by which it seems to be formed. From his en­quiries it appears, that this substance is found in the cavities of the bamboo, the Arundo bambos of Linnæus; and that it exists originally in the state of a transparent fluid, which ac­quires by degrees the consistency of a mucilage resembling honey, and is afterwards converted by gradual induration into a white solid, called Tabasheer. From the analysis of Mr. Macie (now Mr. Smithson), it appeared to be “perfectly identical with common siliceous earth.” The celebrated traveller M. Humboldt, discovered the same substance in the bamboos which grow to the west of Pinchincha, in South America, and a portion of what he brought to Europe in 1804, was analyzed by Fourcroy and Vauquelin, who found it to consist of 70 parts of silex, and 30 of potash and lime.

scholarly journals On the optical and physical properties of tabasheer. By David Brewster, LL. D. F. R. S. Lond. and Edin. In a letter to the Right Hon. Sir Joseph Banks, Bart. G. C. B. P. R. S. &c

1833 ◽  
Vol 2 ◽  
pp. 115-116
Keyword(s):  
Optical Properties ◽  
Specific Gravity ◽  
Physical Properties ◽  
The State ◽  
Index Of Refraction ◽  
Flint Glass ◽  
The Third ◽  
Refractive Power ◽  
The Absolute ◽  
The Right

Tabasheer is a substance found in the cavities of the bamboo, existing originally in the state of a transparent fluid, but gradually indurating into a solid of different degrees of hardness: it consists of 70 silica, + 30 potash and lime. One variety has a milky transparency, transmitting a yellowish, and reflecting a bluish light; another is translucent, and a third opake: the two first varieties become transparent, and evolve air when immersed in water: the third evolves air also, but remains opake. If the first varieties be only slightly wetted they become quite opake. The property of acquiring transparency by the evolution of air from, and the absorption of water by its pores, belongs also to the hydrophanous opal; but the faculty of becoming opake by a small quantity, and transparent by a larger, of water, shows a singularity of structure in tabasheer. As the tabasheer disengages more air than hydrophane, its pores must be more numerous; and therefore the transmission of light, so as to form a perfect image, indicates either a very feeble refractive power or some peculiarity in the construction of its pores. To determine this, Dr. Brewster formed a prism of tabasheer with an angle of 34° 15', and upon measuring its refractive power found it very low, though various in different specimens, the index of refraction varying from 1·11 to 1·18, that of water being 1·33, of flint-glass 1·60, of sulphur 2·11, of phosphorus 2·22, and of the diamond 2·47. So that tabasheer has a lower refractive power than any other solid or liquid, and holds an intermediate place between water and the gases. Dr. Brewster then gives a formula for computing the absolute refractive power of bodies, and a table of results, from which it appears that, in this respect, the refractive power of tabasheer is so low as to be separated by a considerable interval from all other bodies. The author next proceeds to detail a variety of experiments upon the absorbent powers of the different kinds of tabasheer, in respect to several liquids, and the corresponding effects upon its optical properties and specific gravity, and concludes with observations on the cause of the paradox exhibited by the transparent tabasheer, in becoming opake by absorbing a small quantity of water, and transparent when the quantity is increased.

scholarly journals Electroresistive method for monitoring the technical condition, quality, reliability and safety the supports of rolling of electrical machines

2022 ◽  
Vol 1211 (1) ◽  
pp. 012021
Author(s):  
K V Podmasreryev ◽  
V V Markov ◽  
V V Mishin ◽  
A V Selikhov ◽  
N V Uglova
Keyword(s):  
Mathematical Modeling ◽  
Electrical Resistance ◽  
Experimental Studies ◽  
Rolling Bearing ◽  
Technical Condition ◽  
Electric Machines ◽  
The State ◽  
Electrical Machines ◽  
Technical State ◽  
Internal Environment

Abstract The necessity of monitoring the technical condition of the rolling supports of electric machines has been substantiated. It is proposed to use the electrical resistance of the bearing as an indicator of the technical condition the rolling support. The results of mathematical modeling of electrical resistance in the form of a function of resistance from factors of the internal environment of the bearing and modes of its assembly and operation in a rolling bearing are presented. An electroresistive method for monitoring the technical state the rolling support is proposed, which differs from the known methods by original algorithms for collecting information about the state of bearing parts, experimental studies have been carried out to confirm the efficiency of this method.

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