Method and system for analyzing humidity field and shrinkage stress field of concrete

Abstract

The invention discloses a method and a system for analyzing a humidity field and a shrinkage stress field of concrete. The method comprises the following steps: acquiring relative humidity data, constructing a relative humidity equation based on the relative humidity data, solving the relative humidity equation to obtain relative humidity, and calculating the relative humidity to obtain shrinkage strain. acquiring elastic strain and creep strain, creating a stress time-history analysis formula based on the shrinkage strain, the elastic strain and the creep strain, calculating the stress time-history analysis formula to acquire analysis results of the concrete humidity field and the shrinkage stress field. The coupling relation between the relative humidity and the shrinkage strain is fully considered, and finally, the stress of the reinforced concrete structure under the shrinkage action is accurately analyzed on the premise of the creep action.

Description

technical field [0001] The invention relates to the technical field of concrete stress analysis, in particular to an analysis method and system for concrete humidity field and shrinkage stress field. Background technique [0002] The shrinkage deformation of concrete mainly includes three parts: drying shrinkage deformation and autogenous shrinkage deformation caused by humidity changes. There are few studies on the autogenous shrinkage of concrete, especially the quantitative calculation of autogenous shrinkage deformation, and there are few relevant materials at home and abroad. At present, there are relatively many studies on the drying shrinkage of concrete. When the relative humidity of the external environment is low, the concrete will diffuse moisture into the external environment, which will lead to the occurrence of drying shrinkage deformation. The size of drying shrinkage deformation is affected by two aspects: one is affected by the amount of moisture loss inside...

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Problems solved by technology

[0003] In order to solve the problems existing in the above-mentioned prior art that the impact of the humidity field on concrete shrinkage deformation is not considered, resulting in inaccurate final stress analysis, etc., the present invention provides an analysis method and system for the concrete humidity field and shrinkage stress field, and establishes The relative humidity field inside the concrete, and then establish the shrinkage stress field of the concrete through the coupling relationship between the relative humidity and the shrinkage strain, and finally analyze the stress of the reinforced concrete structure under the shrinkage effect under the premise of considering the creep effect

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