HYDRAULICS. ENGINEERING HYDROLOGY. HYDRAULIC ENGINEERING

Characteristics of ice, needed for ice loadings determination

Vestnik MGSU 12/2015
  • Polit’ko Valentin Aleksandrovich - Moscow State University of Civil Engineering (National Research University) (MGSU) postgraduate student, Department of Hydraulic Engineering, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Kantarzhi Igor’ Grigor’evich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Department of Hydraulic Engineering, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 106-117

In order to determine ice loads on the offshore oil and gas structures different ice information is required as an input data. At the present moment there is no unified generally recognized methodology for estimating ice loads and set the main ice parameters. In this relation there appears a question of the ice parameters which need to be investigated. The article attempts to analyze a variety of sources, including standards, on the subject of collection of ice information, required and sufficient for the calculation of ice loads. The article presents the basic steps in the planning of ice information collection, the list of main characteristics and parameters of ice, modern methods of observations and direct measurements of the ice, as well as the ways in which the field tests data of physical and mechanical properties of ice is processed. Particular attention is paid to the anisotropy of ice, integrated assessment of the strength of the ice field, as well as the variability of meteorological conditions.

DOI: 10.22227/1997-0935.2015.12.106-117

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FORMATION OF THE STRUCTURE AND COMPOSITION OF THE DATA BANK OF THE SYSTEM OF OPERATIONAL MONITORING OF UNIQUE CONSTRUCTION FACILITIES

Vestnik MGSU 11/2012
  • Soshnikov Aleksandr Aleksandrovich - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Information Systems, Technology and Automation in Civil Engineering, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Blokhina Nina Sergeevna - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Information Systems, Technology and Automation in Civil Engineering, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 288 - 292

The subject matter of the article is the system of continuous monitoring of the technical condition
of structures and its components. The authors also consider the approach to formation of the
data bank based on the cyclic data warehouse. The cyclic data warehouse (CS) is the basic element
of the data bank. Portions of data that represent continuous measurements taken in the non-stop
mode can be rapidly and efficiently saved into the CS system. CS is a file of a fixed size containing
a header and a sequence of objects. Data is supplied into the CS continuously in the cyclic mode:
incoming new data portions replace the outdated ones. New items are written over the old ones
when the storage time of the latter is expired. Data access in the CS is possible within the period
between the recording and replacement of the item.
The proposed option of the system of continuous monitoring of the technical condition of structures
ensures effective asynchronous data transmission between software modules and servers
and data consistency, because:
there is no more need for any additional data deletion operations;
the fixed size of a CS item allows fast data positioning in the CS file in the course of the random
access.
CS of sufficient size will provide for the possibility of a long delay in data transmission in case
of an abnormal situation occurring in the course of operation of the system of continuous monitoring
of the technical condition of structures.
Long-term operation of cyclic data warehouses has proven their effectiveness. For example,
a cyclic data warehouse is incorporated into a continuous monitoring system of the bridge over the
Matsesta River as the core data bank element.

DOI: 10.22227/1997-0935.2012.11.288 - 292

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