Розглянута проблема створення багатопозиційних систем інформаційного забезпечення. Наведено пропозиції щодо введення до складу багатопозиційних систем мобільних аеростатних радіотехнічних комплексів та розрахунку оптимальної конфігурації системи. Запропоновані технічні рішення щодо організації та контролю когерентного зв’язку між пунктами та удосконалення технічного обслуговування багатопозиційних систем.
The article is dedicated to the study of the load level effect on failure-free operation probability of undamaged rectangular cross-section reinforced concrete beams when their strengthening by the tensile steel reinforcement increasing. The presence of the load level simulates the real structure exploitation conditions at their strengthening. The validation of basic and improved reliability evaluation methods on real beam samples allowed receiving the recommended failure-free operation values P(β). Both techniques are adapted to national standards for the reinforced concrete structure design. The difference between the techniques is the operating method of the random parameter of the load level at the moment of amplification. According to the results of approbation the comparative analysis of the received results is carried out – depending on additional steel bar diameter and the load level at the moment of amplification. The practical significance of the article results is in use of both existing and advanced methods of the probabilities of failure-free operation estimation of reinforced concrete bended elements, strengthened by addition of the stretched steel reinforcement under different load levels, in particular, for accepting higher design levels of reliability.
The main purpose of article is to study the influence of load level on the reliability of non-damaged reinforced concrete beams with rectangular cross-section during strengthening by adding stretched steel reinforcement. On the basis of real samples testing of the existing and advanced methods of reliability estimation (depending on the variant of random parameter of the load level at the strengthening moment), adapted to the national norms of reinforced concrete structure design, the recommended value of failure-free probability P(β) – within ranges 0.999624-0.999758 and 0.999606-0.999775 (for two of considered variants, respectively). The comparative analysis of obtained results is conducted depending on the additional steel bar diameter (Ø10 mm, Ø12 mm, Ø14 mm) and load level at the strengthening moment (0.0×Mult, 0; 0.3×Mult, 0; 0.5×Mult, 0; 0.75×Mult, 0, where Mult, 0 is bearing capacity of non-strengthened beam). Practical utility of the study results could be associated with the possibility of usage both existing as well as developed methodology to evaluate reliability for design of bended reinforced concrete elements, strengthened with additional stretched steel rebar subjected to load (simulation of the actual element performance during strengthening), especially in the case of proving reliability levels of its design.
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