Ivanov A.U.
Ivanov A.U.

Ivanov A.U.
канд. техн. наук, вед. научный сотр. ЦИСС ЦНИИСК им. В.А. Кучеренко ОАО «НИЦ «Строительство»


Publications

Compressed Structures Modeling of Hard Protection Constructions of Solid Section With Spiral Reinforcement (Part 2)
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The author produces main points of physics modeling experimental research of rod-shape elements of solid section of hard shield constructions with spirals during statistical pressure and all results are analyzed. Considerable increase of axial strain (not less than in 2-3 times) is detected. The author studies peculiarities of changes of strained and deformated condition during elastic, elasto-plastic and plastic stage of destruction. Two types of destruction are discovered: first is connected with clamps (µcir > µx) breach and second – with spirals (µx > µcir) at reaching maximum and minimum strength respectively. The author suggests limiting condition on beam strength to normalize to deformed criteria which are settled on typical points of diagrams ?-? of helical reinforced concrete. The structure of strengthening and deformability indicators is defined and consists of 3 components: contribution of the concrete and two additives from its cogging by spirals and clamps.  

Compressed Structures Modeling of Hard Protection Constructions of Solid Section With Spiral Reinforcement (Part 2)
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The author studies prospective ways of constructive solution development of ferroconcrete constructions of hard protection of higher lengthwise deformation. The author proposes a constructive solution «clip in clip», which consists of internal (separate lengthwise spirals) and external (cross clamps) clips. The author reviews general approach to mathematical and physical modeling of constructions’ state in use for intended purpose. Physical model experimental studies are recommended to plan within two connected modeling sub-areas, which are responsible for forming of external pressure (area 1) and its further interaction with construction (area 2). In second area the author points out the importance of compliance with conditions of geometric similarity and similarity of used constructive materials (concrete and reinforcing steel) implemented by making a sequence of separate interconnected tests and each test reflects respective physical component of modeling. The author proposes to use deformation diagram ?-? of constructive materials as a general figure which connects physical and mathematical modeling of nature of ongoing interaction process. The author assumes the possibility of usage of computational methods of mathematical modeling as a way of transposition of physical model results on real existing condition.