空间网架结构损伤识别模型试验研究

摘要

制作了大比例的空间网架结构试验模型,并设计了包括构件损伤及支座沉降在内的6种损伤工况,通过对试验模型在损伤前后的节点位移、杆件应变和一阶频率进行对比分析,总结了大跨度空间网架结构在各种损伤状态前后结构静力响应及频率变化规律,为实际工程结构的损伤识别及健康监测提供借鉴.%A large scale space truss structure model was manufactured, and six kinds of damage cases including member damage and support settlement were simulated in test. By comparing node displacement, member strain and the 1 st frequency of the model before and after damage, several changing regularities of static response and the 1 st frequency of the model under different damage cases were concluded, which can be referenced in the damage identification and structural health monitoring of practical engineering projects.