Reverse Analysis for Fire Pyrolysis Parameters of Timber Buildings Based on Response Surface Method

The pyrolysis temperature and reaction heat of timber are two important parameters for fire analysis of timber buildings. For existing buildings, these parameters are influenced by many factors so that they are different from those of indoor fire test. How to get relevant parameters through full scale in-situ experiment is very important. This article relies on a full scale in-situ experiment, and combines with uniform design experiment and non-parametric regression technique to create efficient response surface based on FDS fire dynamic simulation. Then, based on response surface, the pyrolysis temperature and the reaction heat in the case of full scale in-situ experiment can be obtained through interpolation. Finally, comparing the results of inverse calculation with full scale in-situ experiment, the results show that this method can reflect the varying of scenes of timber buildings indoor fire accurately, and the results of inverse calculation can be used for numerical simulation of timber buildings fire.