Based on the analysis of approaches to reinforcing the brick masonry structures, the advantages of carbon fiber as a reinforcing component are presented. Methods for calculating brick structures reinforced with carbon fiber under central and eccentric compression are proposed. These methods allow determining the longitudinal force taking into account the calculated compressive resistance of the masonry, the masonry working conditions and the influence of long-term load, as well as the coefficient of the masonry surface reinforcement at the reinforced wall. The schemes of strengthening the wall with vertical canvases and at the same time vertical and horizontal carbon fiber canvases are considered. Depending on the direction of the eccentricity of the load application, methods for calculating the strength of reinforced masonry under the action of a moment in the masonry plane and from the wall are developed. The ultimate deformations of carbon fiber are estimated taking into account possible options for the destruction of masonry reinforcing elements.

No abstract

The paper is devoted to the study of the single loads effect on the load-carrying capacity and deformability of bolted joints of wooden structures. The introduction substantiates the relevance of the topic, gives a general description of the work, its scientific novelty and practical value. The authors propose an experimental technique for determining the load-carrying capacity of bolted joints when separating the deformation of the dowel hole and that of tensile strain of bolts. The operation of such joints was experimentally and theoretically investigated. The study resulted in statistical confirmation of satisfactory convergence between the theoretical data obtained by the proposed method and the experimental data of the authors, as well as the recommendations on practical application of the suggested calculation method were developed. The deformations of the bolt and the wood were experimentally separated, the diagrams of the deformation of the stretched zone of the bolt were made, and the percentage ratio of the bolt deformations to the total deformations of the entire joint was calculated. To describe the process of the bolt joint deformation due to the action of single static loads, it is recommended to use a hyperbolic dependence, which well reflects the relationship between the load-strain values (F-Δ). A new method is proposed for calculating the bearing capacity of bolted joints, which is based on the use of the initial modulus of strain capacity E0 and the strain capacity coefficient of the joint β. According to this technique, the load-carrying capacity of bolted joints with various geometric characteristics was calculated. The ratio of theoretical values of load-carrying capacity to the experimental values by, on average, 30% showed a greater convergence when compared to the load-carrying capacity calculated according to the current regulatory documents.

Наведено результати розрахунку, проектування та застосування буроін’єкційних паль в нестійких водонасичених ґрунтах на прикладі об’єкту проектування та реконструкції стадіону «Авангард» в м. Рівне. Виконані статичні випробування буроін’єкційних паль та підтверджено збільшення значень фактичної несучої здатності паль відносно розрахункової.  

Наведено результати розрахунку, проектування та застосуваннядерев'яних конструкцій напіврамного типу в будівлі з середнімипрольотами. Запропонована конструктивна схема напіврами з клеєнихдерев'яних конструкцій, що забезпечує необхідну надійність в процесіексплуатації будівлі.