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基于应变响应的预损伤钢筋混凝土梁损伤识别研究
Damage identification research 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:
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:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
吴加权 吴加权 710866288@qq.com 
李红艳 昆明理工大学  
摘要点击次数: 17
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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。以应变计获取了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。研究结果表明文中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:
      In view of difficult to carry out the artificial excitation in health detection of large bridge structure damage,a direct method and principle of structural damage identification by strain response under environmental excitation are presented and derived. The strain response of reinforced concrete beams with different damage conditions are obtained by strain gauge. The frequency, vibration mode and modal damping evolution law of pre-damaged reinforced concrete beam structure’s dynamic characteristic under different damage conditions are studied. The research results show that, under environmental excitation, the method of this article can directly and quickly realize the damage identification of reinforced concrete bridge structure.
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