Abstract
The results of experimental studies to determine the coefficients of aerodynamic resistance in the flow of flexible protective concrete mats located on a horizontal plane are presented. The characteristics of the impact of the power flow on the system of flexible protective mats of various modifications in the aerodynamic laboratory of Moscow State University of Civil Engineering are specified. The experiment was carried out on a subsonic wind tunnel with an open loop using a rigid six-axis force and moment sensor. According to the results of the experiment, it was concluded that the resistance coefficient for the modification of mats with rounding of the upper part of the elements decreases. It has a positive effect on the performance characteristics of this model and increases the lifespan of a structure protected by this modification of coatings.
Highlights
Flexible protective concrete mats are used in the construction of underwater crossings of pipelines, to protect bridge supports, the bottom of the port waters, to strengthen slopes, dumps, and various drainage systems [4, 5, 14]
When a system of bodies interacts with a stream flowing around them, the first row of blocks is directly affected by the oncoming channel flow; the subsequent rows of blocks appear in the tracks formed from the blocks to which the stream flows earlier
The hydraulic characteristics of the flow around the protective mat largely depend on the conditions of installation of protective coatings in the working position
Summary
Flexible protective concrete mats are used in the construction of underwater crossings of pipelines, to protect bridge supports, the bottom of the port waters, to strengthen slopes, dumps, and various drainage systems [4, 5, 14]. The design of these protective mats was patented in 1999 [3], but till the present day new modifications of the designs of universal flexible protective coatings are being developed to optimize economic costs and improve performance characteristics for the various needs of the construction industry [6, 18, 19].
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