The moisture regime calculation of single-layer enclosing structures on the basis of the discrete-continuum method application

7th International Symposium Actual Problems of Computational Simulation in Civil Engineering

土木建筑工程;计算机科学

Gagarin, V.G.^1,2 ; Akhmetov, V.K.^3 ; Zubarev, K.P.^1

Department of Heat and Gas Supply and Ventilation, Moscow State University of Civil Engineering, 26, Yaroslavskoye Shosse, Moscow

129337, Russia^1

Research Institute of Building Physics, Russian Academy of Architecture and Construction Science, 21, Locomotive travel, Moscow

127238, Russia^2

Department of Applied Mathematics, Moscow State University of Civil Engineering, 26, Yaroslavskoye Shosse, Moscow

129337, Russia^3

关键词: Aerated concrete;    Continuous control;    Continuum method;    Engineering methods;    Moisture distribution;    Moisture transfer;    Potential theory;    Unsteady-state methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/456/1/012105/pdf
DOI  :  10.1088/1757-899X/456/1/012105

来源: IOP

【 摘 要 】

The paper examines a number of moisture regime mathematical models. Engineering method for unsteady-state moisture regime calculation using discrete-continuum method based on Gagarin's moisture potential was proposed. A new formula for moisture potential determination in any section of single-layer enclosing structure, at any time, under continuous control for temperature distribution, was derived. Separate methods of moisture potential theory: Gagarin's method, Kozlov's method, and new discrete-continuum method - were compared. Single-layer enclosing structure made of aerated concrete D400 with inner and outer plastering was used as a research sample. It is shown that the proposed discrete-continuum method gives moisture distribution results for the enclosing structure similar to moisture distribution results calculated by Gagarin's unsteady-state method. Results can be obtained by a finite formula without numerical method. It was found out that the discrete-continuum method takes moisture transfer response rate into account.