段红霞,李守巨,刘迎曦,袁旭东.钢框架结构两阶段损伤诊断方法[J].,2011,(1):7-13 |
钢框架结构两阶段损伤诊断方法 |
Two-stage damage diagnosis approach for steel frame structures |
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DOI:10.7511/dllgxb201101002 |
中文关键词: 钢框架结构 损伤识别 两阶段损伤诊断 不完备测试信息 |
英文关键词: steel frame structure damage identification two-stage damage diagnosis incomplete measurement information |
基金项目:国家自然科学基金资助项目(90815023);“九七三”国家重点基础研究发展计划资助项目(2007CB714006). |
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中文摘要: |
为了对实际钢结构工程进行损伤识别,提出了两阶段损伤诊断方法 第一阶段在随机少量布置测点的情况下,识别出损伤发生最大概率区域;第二阶段在损伤可能区域重新布置测点,准确识别损伤部位及其损伤程度.通过对一个3层钢框架结构的数值模拟,研究了测点位置、模态数量、测试噪声对识别精度的影响.研究结果表明,即使在不完备测试信息的情况下,两阶段损伤诊断方法也能有效识别出钢结构损伤位置及程度. |
英文摘要: |
For the purpose of identifying the damage of steel frame structure, a two-stage damage diagnosis method is presented. At the first stage, the most probable damage area is identified by randomly placing a few sensors. At the second stage, the sensors are placed in probable damage places, and the damage sites and damage extent can be accurately indentified. Using mathematical simulation of a three-layer steel frame structure, the effects of the measurement sites, number of modes, and noise on the precision of identification are assessed. The results demonstrate that even with incomplete measurement information, the two-stage damage diagnosis method can effectively identify the damage sites and extent in the steel frame structure. |
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