Analysis for Wood Decay within Building Envelops Considering Moisture Production by Biochemical Reactions

摘要

In this study, a durability assessment model for building envelopes design based on hygrothermal and wood rot decay analysis is presented. The durability assessment model can quantitatively predict hygrothermal conditions within the building envelopes, and progress of wood rot decay of timber frame under variable conditions. The followings are characteristics of the durability assessment models in this study. One is that development of wood rot decay is represented by a differential equation with a variable of mass loss; the other is that moisture production by wood rot decay is added into moisture balance equations. Hence, the model can assess long term performance regarding both durability and drying potential for building envelopes. In this paper, sensitive analyses were implemented to better understand impact of the moisture production on the decay process. Additionally, progress of the wood rot decay within an external wooden wall is demonstrated.