用振动参数识别技术对混凝土框架进行破损评估

本文提出了采用振动参数识别技术对混凝土平面框架结构进行破损评估的新方法.该方法是首先采用“残余力向量”识别结构的损伤部位,然后再用振动理论中的加权灵敏度分析的方法识别结构的物理参数,由此识别结构的损伤严重程度.经三榀钢筋混凝土框架的试验结果表明,本文的方法是可行的.

DAMAGE ASSESSMENT OF REINFORCED CONCRETES STRUCTURES BY VIBRATION PARAMETER IDENTIFICATION TECHNIQUE

In this paper, the vibration parameter indentification technique is used for damage assessment of reinforced concrete frame structures, In which, the locations of damage in the structure are first identified by vibratory residual vectors. Then the physical parameters of the structure are identified by the weighted sensitivity analysis method, so that the severity of damage in the structure is assessed. Thus, not only the locations of damage can be detected uniqely, but also the damage severity of structures by sensitivity analysis can be made simply and the caculation work reduced greatly.The results of three reinforced concrete frames from tests show that the methods set up in the paper are acceptable.