The deformability of short pillars in various loading options and external composite reinforcement

Abstract

The test results on deformation and rigidity of short compressed reinforced concrete pillars with various types of external transverse and longitudinal composite reinforcement are given. The samples from heavy concrete with design strength class B30-35 were tested, having the same cross-section 250x125 (h) mm and length 1200mm with flexibility λh = 10. The pillars were reinforced with 4Ø12A500 in the longitudinal direction and with tied clamps Ø6B500, installed with the step of 180 mm - in the transverse direction. The purpose of the experiment was to determine the effect of the rigidity of reinforced elements on the deformability of short experimental samples. It was necessary to determine how the eccentricity of the load application influences on the variation in the rigidity of the reinforced elements. The purpose was also to obtain data on the deformability of pillars loaded with small eccentricities, i.e. when e0 = 0.16h. It was found that the most effective type for short pillars reinforcement is a three-layer holder, which has maximum rigidity and minimal deformability. However, its efficiency gradually decreases when the eccentricity of the load application increases.

Development of modern design solutions to increase the stone buildings’ seismic resistance in the reconstruction process

“…To implement the design solutions for the above-mentioned requirements, other methods can also be applied, for example, using modern amplification methods using composite materials [9][10][11]. This will increase the rigidity of each structure and the building as a whole.…”

Actual problems of the design documentation development for capital repairs or reconstruction of capital structural facilities

“…For the implementation of design solutions to strengthen the basin of the pool, other methods can also be applied, for example, using modern reinforcement methods using composite materials [9][10][11]. This will increase the rigidity of each structure and the bowl as a whole.…”

The beams with composite reinforcement inclined sections’ finite element modeling operation results comparison with the results of the laboratory samples’ tests

“…As part of a large-scale study of the work of reinforced concrete structures reinforced with composite materials, at the Department of Reinforced Concrete and Stone Structures, DSTU, the operation issues of reinforced concrete structures reinforced with round glass and carbon fiber reinforcement [1][2][3][4], the sections strength of reinforced concrete beams normal to the longitudinal axis of the element, reinforced external composite reinforcement [5], compressed reinforced concrete elements reinforced with composite materials at different eccentricities of load application [6][7][8][9]. Also, a study on the sections of reinforced concrete beams that are inclined to the longitudinal axis of the element, reinforced with external composite clamps in the presence and absence of initial inclined cracks was carried out [10][11][12][13][14].…”