Research on the mechanism of energy efficiency degradation and durability evaluation of exterior wall external insulation systems of existing buildings
LIU Changshun
XING Chaoyang
ZHANG Xiaotian
Abstract：The exterior wall external insulation system(ETICS)has been widely applied in new construction and existing building renovation projects in China.However,during its long-term service,it may experience problems such as detachment and cracking due to the combined effects of multiple environmental factors,which seriously affect the energy-saving effect and safety.The paper systematically reviews the research progress on the degradation mechanism and durability assessment of ETICS,analyzes the influence mechanism of environmental factors at the material-interfacial-system multi-scale level,summarizes the limitations of methods such as laboratory accelerated aging,on-site non-destructive testing,and numerical simulation,explores the integration path of risk-based comprehensive assessment models and machine learning technologies,and proposes a three-dimensional coupling theoretical framework of'environmental factors-material degradation-system failure'.The research shows that the combined effects of multiple factors exhibit significant nonlinear characteristics,and traditional assessment methods cannot accurately predict the degradation of system performance.Machine learning and digital twin technologies provide new approaches for intelligent assessment and early warning,enabling a transition from'passive assessment'to'active early warning'.
Keywords：exterior wall external insulation systemmultifactor couplingdigital twinnonlinear degradationdurability assessment
Publication Date：2026-01-31
Online Publishing Date：2026-03-11(First online date of this platform, not the publication date of the document)
Pages：5( 156-160 )