scholarly journals MONITORING OF MONOLITHIC OVERLAP WITH PRESTRESSED BEAMS

2021 ◽  
Vol 82 (4) ◽  
pp. 119-130
Author(s):  
T.A. Tolkynbayev ◽  
◽  
A.D. Mekhtiev ◽  
A.K. Kozhas ◽  
Sh.B. Toleubayeva ◽  
...  
Keyword(s):  
Strain State ◽  
Fiber Optic ◽  
Light Wave ◽  
Fiber Optic Sensors ◽  
Reinforced Concrete Structures ◽  
Building Structures ◽  
Crack Control ◽  
Experimental Part ◽  
Fiber Optic Technology ◽  
Prestressed Beams

A method for monitoring the stress-strain state of building structures has been developed. A technical inspection of monolithic slab structures using electronic beacons for crack control was carried out. The basis of the monitoring system of monolithic reinforced concrete structures is a fiber-optic technology based on the control of changes in the parameters of the light wave. For the experimental part, a scheme for testing fiber-optic sensors has been developed.

Automated Fiber-Optic System for Monitoring the Stability of the Pit Quarry Mass and Dumps

2021 ◽  
pp. 19-26
Author(s):  
А.D. Меkhtiyev ◽  
◽  
E.G. Neshina ◽  
P.Sh. Madi ◽  
D.A. Gorokhov ◽  
...  
Keyword(s):  
Rock Mass ◽  
Optical Fiber ◽  
Optical Fibers ◽  
Fiber Optic ◽  
Light Wave ◽  
Single Mode ◽  
Fiber Optic Sensors ◽  
Fiber Optic Sensor ◽  
Laboratory Sample ◽  
Single Mode Optical Fiber

This article ls with the issues related to the development of a system for monitoring the deformation and displacement of the rock mass leading to the collapse of the quarry sides. Monitoring system uses point-to-point fiber-optic sensors. Fiber-optic sensors and control cables of the communication line are made based on the single mode optical fibers, which allows to measure with high accuracy the deformations and displacements of the rock mass at a distance of 30-50 km. To create fiber-optic pressure sensors, an optical fiber of the ITU-T G. 652.D standard is used. Laboratory sample is developed concerning the point fiber-optic sensor made based on the two-arm Mach-Zender interferometer using a single mode optical fiber for monitoring strain (displacements) with a change in the sensitivity and a reduced influence of temperature interference leading to zero drift. The article presents a mathematical apparatus for calculating the intensity of radiation of a light wave passing through an optical fiber with and without mechanical stress. A laboratory sample of single mode optical fibers based on the Mach-Zender interferometer showed a fairly high linearity and accuracy in the measurement and can be used to control the strain of the mass after appropriate refinement of its design. Mathematical expressions are also given for determining the intensity of the light wave when the distance between the fixing points of a single mode optical fiber changes depending on the change in the external temperature. A diagram for measuring strain using a point fiber-optic strain sensor is developed. Hardware and software package is developed, which can be used to perform a number of settings of measuring channels. The work is aimed at solving the production problems of the Kenzhem quarry of AK Altynalmas JSC.

scholarly journals Application of BIM-technologies during the construction and operation of buildings and structures

2021 ◽  
Vol 274 ◽  
pp. 06009
Author(s):  
Andrey Bogdanov ◽  
Vladislav Zaitsev ◽  
Karina Khalitova
Keyword(s):  
Decision Making ◽  
Life Cycle ◽  
Strain State ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
The State ◽  
Building Structure ◽  
Stress Strain ◽  
Stress Strain State ◽  
Incoming Information

The relevance of implementing BIM technologies at all stages of the building's life cycle from design to decision-making on its demolition is shown. Variants of the stress-strain state of buildings and structures are considered. An algorithm for analyzing incoming information and making decisions about major repairs, reconstruction, or demolition of an object is developed, depending on the values of parameters, their duration, and combinations obtained from sensors installed during their construction. The use of fiber-optic sensors for obtaining information and subsequent analysis of the state of the building structure and determining dangerous movements of its individual elements is proposed.

scholarly journals Fiber-optic sensors for monitoring the stress-strain state of construction objects

2019 ◽  
Vol 643 ◽  
pp. 012113
Author(s):  
E Badeeva ◽  
D Serebryakov ◽  
E Shachneva ◽  
A Badeev ◽  
T Murashkina
Keyword(s):  
Strain State ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Stress Strain ◽  
Stress Strain State
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