Assessment of strength and deformation of lightweight concrete and its components under triaxial compression, taking into account the macrostructure of the material

Raupov, Chorikul; Shermuxamedov, Ulugbek; Karimova, Anora

doi:10.1051/e3sconf/202126402015

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…PP-3632 "On approval of the program for the construction, reconstruction and capital repair of road bridges, overpasses, and other artificial structures in the Republic of Karakalpakstan, regions and the city of Tashkent for 2018-2022," dated March 29, 2018, and No. PP-4545 "On measures to further improve the management system of the road industry," dated December 9, 2019 [1,2] are important programs to raise work to a new level.…”

Section: Introductionmentioning

confidence: 99%

Analysis of technical and operational condition of urban reinforced concrete bridge structures

et al. 2023

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The article analyzes the technical condition of urban reinforced concrete bridge structures. The authors studied the technical passports of all bridges and overpasses in Tashkent and made direct technical inspections of more than 10 bridge structures. As a result, most of the shortcomings and defects of the existing bridge structures in the city were revealed. In Tashkent, there is a significant number of reinforced concrete bridge structures, the service life of 60 to 100 years (24% of the total number), a significant part of which (42%) has been operated for many years without major repairs. A "four-level" approach is proposed, which contains four stages of analysis, and evaluates the technical condition of the operated reinforced concrete bridge structures.

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Section: Introductionmentioning

confidence: 99%

Analysis of technical and operational condition of urban reinforced concrete bridge structures

et al. 2023

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“…Over the past 40-50 years, many interesting solutions were made in bridge engineering, which brought new types of bridges, such as cable truss bridges, split pre-stressed concrete bridges, long span bridges, etc. [2,3].…”

Section: Introductionmentioning

confidence: 99%

Calculation of Continuous Reinforced Concrete Bridges And Overpasses Inseismically Hazardous Areas

Shermukhamedov,

Karimova,

Zakirov

2023

E3S Web of Conf.

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In recent years, in the Republic, the design and construction of continuous reinforced concrete bridges and overpasses were conducted at a colossal pace. Foreign advanced technologies, methods, and software systems were taken into account. Foreign experience in studying rubber-metal bearing parts of bridges and overpasses was analyzed. The article presents the calculation of a continuous reinforced concrete overpass for seismic impacts using the finite element method in the framework of the linear spectral theory. Numerical calculations have shown that the bearing part of the right end of the overpass does not allow the span to fall from the abutment because the maximum displacement of the rubber-metal bearing part is 0.2 m. As a result, the span structure and overpass supports have an overestimated margin of safety for an 8-point earthquake, according to MSK-64.

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Comparison of microcrack formation boundaries determined by complex of physical methods with long-term strength of expanded clay concrete under different types of stress state

Raupov

Malikov

2023

E3S Web of Conf.

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This work aims to experimentally study the strength and strain of expanded clay concrete during short-term and long-term compression and tension under various loading modes. A technique for testing expanded clay concrete under short-term and long-term compression and tension, including the boundaries of microcrack formation by a complex of physical methods (tensometric, ultrasonic pulsed, and acoustic emission), is given. The results of tests of expanded clay concrete under short-term and long-term monotonic loading under compression and tension and low-cycle loading under compression, as well as the boundaries of microcrack formation by a complex of physical methods, are obtained. The boundaries of microcrack formation are compared with the long-term strength of expanded clay concrete under various types of stressed states. Strain diagrams of expanded clay concrete under axial compression and tension, and "ultrasound transmission speed - stress level" and "number of acoustic pulses - stress level" diagrams are also obtained. Empirical formulas are proposed for determining the boundaries of microcracking in expanded clay concrete and the relationship between the level of long-term strength and the time of staying specimens under load in compression and tension. The results allow the formulation of several proposals and clarifications for normative documents to calculate and design lightweight concrete elements and structures.

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Assessment of strength and deformation of lightweight concrete and its components under triaxial compression, taking into account the macrostructure of the material

Cited by 5 publications

References 3 publications

Analysis of technical and operational condition of urban reinforced concrete bridge structures

Analysis of technical and operational condition of urban reinforced concrete bridge structures

Calculation of Continuous Reinforced Concrete Bridges And Overpasses Inseismically Hazardous Areas

Comparison of microcrack formation boundaries determined by complex of physical methods with long-term strength of expanded clay concrete under different types of stress state

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