Study on earthquake damage evolution model of through-mortise joints in ancient wooden structures
In order to quantitatively evaluate the earthquake damage degree and earthquake damage evolution process of through-mortise joints in ancient wooden structures,the Kratzig earthquake damage model was improved.Based on the Diaobo earthquake damage model,Kratzig earthquake damage model and the improved Kratzig earthquake damage model,the earthquake damage analysis of three groups of through-mortise joints was carried out,and the applicability of the three models was studied.In order to evaluate the earthquake damage of through-mortise loosening in practical engineering,the influence of through-mortise loosening based on the improved Kratzig earthquake damage model was considered.The results show that the improved Kratzig earthquake damage model has the best description of earthquake damage of through-mortise joints,and can overcome the deficiency of Diaobo earthquake damage model and Kratzig earthquake damage model.With the increase of the degree of loosening,the damage index of the through-mortise joint increases slowly,and the damage index decreases at the final failure.Finally,according to the domestic seismic fortification code,and considering the earthquake damage assessment of ancient wooden structure,the performance level classification of through-mortise joint and the suggestions for strengthening in each stage were put forward.
ancient wooden structurethrough-mortise jointearthquake damage modelperformance level classificationjoint reinforcement
NETL
NSTL
万方数据
