Steam-cured concrete damp-heat elastic response prediction method, system, storage medium and program

Abstract

The invention belongs to the technical field of steam-cured concrete prefabricated parts, and discloses a steam-cured concrete damp-heat elastic response prediction method, a system, a storage mediumand a program. The steam-cured concrete damp-heat elastic response prediction method comprises the steps of establishing a fractional order generalized damp-heat coupling model; solving the model to obtain temperature and humidity in a pull-type domain; writing a Laplace inverse transformation program through Matlab software to obtain a temperature and humidity field in a time domain. According tothe model, the influence of the heat flow rate and the fractional order on heat conduction is considered, and the influence rule of the heat flow fractional order on temperature and humidity distribution under thermal shock is calculated. According to the model, the influence of the wet shunt rate and the fractional order on wet diffusion is considered, and the influence rule of the wet shunt fractional order on temperature and humidity distribution under thermal shock is calculated. By means of the fractional order generalized damp-heat coupling model established through the method, abnormaldamp-heat behaviors of the concrete in the high-temperature and high-humidity steam curing process can be accurately described.

Description

technical field [0001] The invention belongs to the technical field of steam-cured concrete prefabricated components, and in particular relates to a method, system, storage medium and program for predicting the hygrothermal elastic response of steam-cured concrete. Background technique [0002] At present, steam-cured concrete prefabricated components are widely used in structures such as sleepers, track bed slabs, and tunnel lining segments in underground rail engineering due to their low cost, short production cycle, and environmental protection. However, a large number of engineering practices at home and abroad have shown that steam-cured concrete precast components have problems such as high brittleness, easy cracking, and poor durability during service. This is because the concrete is affected by the high-temperature and high-humidity environment during the rapid steam curing process, and the internal temperature and humidity will change drastically, causing the concre...

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Problems solved by technology

It is well known that integer order time derivatives are defined by local limits, which cannot describe history-dependent processes

[0004] Through the above analysis, the existing problems and defects of the existing technology are: because it is difficult to monitor the temperature and humidity changes of concrete during the steam curing process through experiments, there are few researches on the distribution of temperature and humidity fields inside steam curing concrete at home and abroad, and it is urgent to establish Reasonable theoretical model to predict the hygrothermal elastic response of concrete in the process of high temperature and high humidity steam curing

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