【摘要】 提出在构件上增设附加质量来模拟结构损伤的试验方法,证明了质量增加与刚度降低的等价关系。以简支梁为例,给出了采用附加沙袋法、悬挂质量法两种附加质量方式模拟结构损伤的具体试验方案,完成了多工况下简支梁附加质量模拟结构损伤的动测试验。通过试验验证了本文所提方法的正确性,得出了在梁构件上采用附加沙袋法可准确模拟出不同损伤位置、不同损伤程度的结论。为结构健康诊断与损伤识别方法的验证提供了一种简便的、可重复使用同一个试验构件的实验方法,避免了不同试验构件随机性对测试结果的影响,具有较大的实用价值。更多还原

【Abstract】 A new experimental method by adding additional mass on the tested components to simulate structural damage is proposed,and the equivalence relationship between mass addition and stiffness degradation is proved in this paper.Taking a simply supported beam component as an example,two kinds of additional mass experimental method were proposed,one is the adding sandbag method,the other one is the hanging mass method.Furthermore,steel simply supported beam dynamic testing under various conditions of adding mass to simulate structural damage was carried out.Experimental results validate this method,and it is concluded that structural damage at different locations and with different degrees of beam component can be simulated by adding sandbags on it.This experiment provides a method of simulating structural damage for structural health diagnosis and damage identification.Using this method,only one test component is needed,and the operation procedure is simple and convenient.Its maximum advantage is avoiding the randomness of different tested components and has great practical value.更多还原