Development of the Computer Program of Calculation of Concrete Bored Piles in Soil Ground of Astana City

Awwad, Talal

doi:10.21660/2019.60.17339

Cited by 9 publications

(7 citation statements)

References 5 publications

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“…The developed software systems have been tested on solving test problems, with satisfactory comparison of shell calculation results with known solutions [ 46 , 47 ] and experimental data [ 48 , 49 ]. They passed the state registration of copyright in the authorized bodies of Kazakhstan [ 50 ].…”

Section: Resultsmentioning

confidence: 99%

Creep of Concrete in Shell Structures: Nonlinear Theory

Mussabayev,

Nuguzhinov,

Nemova

et al. 2023

Materials

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The creep of concrete is one of the main problems threatening concrete structural development and the stability and safety of structures. However, the nonlinear theory is the key to solving the problem of taking into account the physical and mechanical properties of concrete creep in shell structures. To create such a theory, the original shell is replaced by a continuous equivalent elastic shell. To determine the stress–strain state of the structure, the equations of nonlinear creep and crack growth are derived, and a deformation model of the section is created. The behavior of the structure at all stages of the life cycle is investigated by solving the solving systems of differential equations of equilibrium, motion, and perturbation of the equivalent shell. The values of the ratios of dependence of long-term and short-term critical loads on deformations, forces, cracks, etc., are given. The accuracy of the solution of the developed nonlinear theory is compared with the linear theory of concrete creep as well as experimental data. The results show that, according to the linear theory, for the values for the short term and long term, up to 56% and up to 39% of critical loads are overestimated, respectively. The creep process in practical engineering can be effectively controlled by the results of the proposed theory.

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Section: Resultsmentioning

confidence: 99%

Creep of Concrete in Shell Structures: Nonlinear Theory

Mussabayev,

Nuguzhinov,

Nemova

et al. 2023

Materials

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“…That is salvation of crucial historical heritage in the oldest countries of the world (Syria, Iraq, Livia etc.) [9][10][11][12][13], where terrorists systematically destroy landmark monuments including those from the UNESCO Heritage List.…”

Section: Discussionmentioning

confidence: 99%

The role of Professor Betancourt in preservation of architectural heritage in historical cities of the world

et al. 2023

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One can address an issue which generates an argument of colleagues-civil engineers, architects and mechanical engineers working with machines. Bridge engineers can also enter the discussion stating that a world-renowned scholar Augustin Betancourt belongs to their “bridge” community. He had an experience of constructing bridges and floors with large spans. His structures and ideas in all these directions of engineering thought were broadly used and even now they are applied in the modern world practice. We can give a lot of examples, as A. Betancourt’s structures and ideas have been used by many engineers including the authors of this paper in their long-term practice of reconstruction of the unique buildings in Russia. There are dozens of buildings and structures only in St. Petersburg and its closest suburbs where A. Betancourt was an author, an advisor, an expert, whose indications were implemented in many projects of urban development. A. Betancourt was actively involved as a head of the Committee for Construction and Hydraulic Works in St. Petersburg. This committee also participated in expert evaluation of development of the largest Russian cities of that time.

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“…Currently, due to changes in the composition of traffic and an increase in the load capacity of motor vehicles, the service life of road surfaces has been sharply reduced. Pavements made of asphalt concrete are considered to last up to 5-6 years and those made of cement concrete can last up to 25 years [1][2]. Also, the low rate of reconstruction and construction of new roads, according to outdated standards, designed for 20 years [3], does not allow for avoiding the annually increasing costs of road repairs.…”

Section: Introductionmentioning

confidence: 99%

Construction of Durable Roadsrom Rolled Concrete Based on Belite Slag Cement and Binders

Asmatulayev¹

2023

GEOMATE

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Roads for wheeled vehicles are one of the main types of transportation infrastructure required for economic activity. The construction of road pavements with cement concrete requires the use of modern, expensive concrete-laying machines. The complexity of this construction technology can be an impediment to using these materials. The main reason for the complexity of the technology, is the use of traditional Portland cement, with a fast-setting time. This paper presents a study of the strength properties of belite cement. The samples were investigated under normal conditions, at constant low positive and negative temperatures according to the specified curing regimes. The results of the study show that the development of the strength of belite cement can exceed conventional concrete. Concrete based on belite binder at 90 days has similar strength as conventional concrete. While the conventional concrete stopped gaining strength at 30 days, the strength of the slag concrete based on belite cement binder continued to increase for 15 months.

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Development of the Computer Program of Calculation of Concrete Bored Piles in Soil Ground of Astana City

Cited by 9 publications

References 5 publications

Creep of Concrete in Shell Structures: Nonlinear Theory

Creep of Concrete in Shell Structures: Nonlinear Theory

The role of Professor Betancourt in preservation of architectural heritage in historical cities of the world

Construction of Durable Roadsrom Rolled Concrete Based on Belite Slag Cement and Binders

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