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吴加权,李红艳,叶飞,马琨*.基于应变响应的预损伤钢筋混凝土梁损伤识别研究[J].实验力学,2018,33(2):299~306
基于应变响应的预损伤钢筋混凝土梁损伤识别研究
On the damage identification of pre-damaged reinforced concrete beam based on strain response
投稿时间: 2016-11-07  最后修改时间: 2017-08-07
DOI:10.7520/1001-4888-16-237
中文关键词:  应变响应  预损伤钢筋混凝土梁  固有频率  应变模态振型  损伤识别
英文关键词:strain response  pre-damaged reinforced concrete beam  natural frequency  strain mode shape  damage identification
基金项目:国家自然科学基金资助项目(5127823);云南省教育厅重大项目资助(KKJI201507001)
作者单位
吴加权 昆明理工大学理学院 云南昆明 650093 
李红艳 昆明理工大学理学院 云南昆明 650093 
叶飞 昆明理工大学理学院 云南昆明 650093 
马琨* 昆明理工大学理学院 云南昆明 650093 
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中文摘要:
      针对大型桥梁工程结构健康检测中难以实施人工激励的实际状况,提出和推导了环境激励下由应变响应实现结构损伤识别的快速方法及原理。以应变计获取不同损伤状况下钢筋混凝土梁的应变响应信息,研究了预损伤钢筋混凝土梁结构频率、振型、模态阻尼等动力特性在不同损伤状况下的演变规律。研究结果表明,本文所提原理和方法可直接、快速实现环境激励下钢筋混凝土桥梁结构的损伤识别。
英文摘要:
      Aiming at the practical situation that artificial excitation is difficult to be carried out in health detection of large bridge engineering structure,based on strain response, the method and principle to realize structural damage rapid identification under environmental excitation are proposed and derived in this paper.Strain response information of reinforced concrete beam under different pre-damage conditions is obtained by strain gauge, the evolution of dynamic characteristics of pre-damaged reinforced concrete beam, such as frequency, vibration mode, modal damping and so on, is studied under different pre-damage conditions. Results show that the principle and method proposed in this paper can directly and quickly realize damage identification of reinforced concrete bridge structure under environmental excitation.
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