Thick fireproof coatings are widely adopted for their good performance but it may be easily damaged in loadings such as earthquake and impact

which may leads to a considerable reduction in fire resistance.In this paper

finite element models are established to simulate the damage initiation and propagation of thick fireproof coatings for steel plates under monotonic axial tensile loading.The verified finite element model is then adopted for parameter analysis

in which geometric parameters

material property parameters and interface parameters are analyzed.It is found that interface debonding is mainly effected by the coating thickness

elastic modulus and bond strength of the coating material and transverse crack is mainly effected by the tensile strength and elastic modulus of the coating material.Based on the results from parameter analysis

a damage assessment method for thick fireproof coatings on steel members subjected to tensile loading is proposed and verified by comparing with test results.