Finite Element Analysis of the Charring Rate of Cross-Laminated Timber Floor

Abstract:

In order to study the finite element analysis method of charring rate of cross-laminated timber (CLT) floor, three groups of domestic CLT floor fire experiments were conducted under ISO834 standard temperature rising conditions. Tensile and shear tests of the adhesive layer were simulated by using the finite element method, and two kinds of finite element models of charring rate of CLT floor were established: the finite element model without considering the delamination of the laminate and that considering the delamination of the laminate. The temperature-time curve and charring depth (rate) curve obtained from the test data were compared with the simulation results of the finite element model.The results show that the longer the fire time is, the higher the charring rate is.Besides, it is feasible to simulate the adhesive in the CLT plate by using cohesive element.Moreover, the finite element simulation results of the carbonization rate considering the delamination of the laminates agree well with the results of the carbonization rate obtained by the test.