Aspects Regarding Dynamic Calculation of Plan Building Elements Having Thermal Bridges

The paper presents a method used in determining the thermal performance of the building envelope components by considering the thermal bridge existence in the structure of the plan construction element. The method is based on a methodology where the real construction element will be replaced by an equivalent 1D element that will allow the calculation of the thermal behavior in unsteady thermal regime. The results obtained using the presented method are identical with the ones obtained using computer programs that use unsteady thermal regime with a plan discretization of the real construction elements. Applications were made for constructive solution used in current building design activity by Romanian structural engineers. Based on the obtained results, a model was established for calculating the unidimensional heat flow that simulates the same effect as in the case of a bi- or tri- dimensional regime.