Creep of concrete under multiaxial compression

Creep, sulfate erosion resistance, fly ash content of concrete, and sustained compression load are important factors that will affect the long-term performance of concrete. It is of great interest to combine these effects together to make a comprehensive investigation of fly ash concrete. However, the concrete creep under both sustained compression load and sulfate attack conditions has rarely been reported. To obtain the creep characteristics of fly ash concrete in a sulfate environment, this paper first finishes the creep experiments of fly ash concrete under sustained compression load and sulfate attack. The test factors include the load stress level, the concentration of sulfate solution, and the content of fly ash. Based on the creep mechanism of fly ash concrete under sulfate erosion, the relationship between time-dependent section area variation and creep was carried out. After comparing different creep models, the creep calculation model of fly ash concrete under sulfate erosion was built via the B4 model combined with the cross-sectional area of the damaged layer and undamaged layer of concrete. Finally, comparing the calculated values with the test results, the calculated results were in good agreement with the test data, which is of practical significance to the practical engineering application and the improvement of structural reliability.

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“…According to the creep theory of concrete under multiaxial stress [27], the effective axial creep Poisson ratio of core concreteμ cp,1 :…”

Section: Creep Model Of Fly Ash Concrete Under Sulfate Erosionmentioning

confidence: 99%

Creep Properties of Axially Compressed Fly Ash Concrete under Sulfate Corrosion

Cao

Han

2022

Advances in Materials Science and Engineering

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“…Yu.V. Kogan [22] showed the parameters of interconnected housing stock development and SI. In his research work, D.V.…”

Section: Introductionmentioning

confidence: 99%

Social infrastructure importance for modern city and the ways of its urban development

Strashnova

2022

E3S Web Conf.

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The present study objective is to determine the importance of social infrastructure for modern city and to identify the ways of its urban development (Moscow, as an example). Statistics data (taken from official municipal and regional sources), results of systematic, typological, functional and structural analysis, sociological survey of population was used. Assessment of society development current challenges, analysis of scientific research in economy, education, culture, allowed the author to determine the importance of social infrastructure for modern city as a tool for urban environment transformation, quality improvement of human asset, strengthening the economic basis of the city. The author offered the periods of Moscow social infrastructure development from the early 20th century until present by identifying basic political and economic tasks, which determined the role and directions of cultural and consumer services sphere development. Within existing structural deformations of the system of cultural and consumer services for the population, the lack of territorial resources in the established development areas, the ways of social infrastructure improvement were proposed. These ways include planning optimization of the territory, clarifying typology and structure of public centers, working out the model of functional and spatial organization of the service system, techniques for intensifying the territory usage, sociological factor accounting, monitoring the level of social infrastructure urban development. The newness of the present study from the scientific point of view is a comprehensive approach to improvement of the city social infrastructure, including planning, sociological, architectural and spatial aspects.

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