| 高温下钢筋混凝土梁损伤识别研究 |
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| 引用本文： | 高立堂,许盼让,褚桂勋.高温下钢筋混凝土梁损伤识别研究[J].结构工程师,2020,36(1):60-66. |
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| 作者姓名： | 高立堂 许盼让 褚桂勋 |
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| 作者单位： | 青岛理工大学土木工程学院,青岛266033;青岛理工大学土木工程学院,青岛266033;青岛理工大学土木工程学院,青岛266033 |
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| 摘 要： | 以动力损伤识别理论和火灾损伤识别理论为基础,针对火灾损伤特点引入了横观各向同性梁,同时考虑到简支梁刚度与弹性模量、中性轴和配筋率的关系,建立了火灾下钢筋混凝土简支梁的自由振动方程及其解析解。提出了以刚度为转换变量、以频率为指纹参数的识别损伤的新方法,并利用ABAQUS有限元软件对其进行了模拟验证,得出理论与模拟具有高度一致性。
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| 关 键 词： | 简支梁 火灾损伤识别 频率 有限元分析 |
Research on Damage Identification of Reinforced Concrete Beams under High Temperature |
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| GAO Litang,XU Panrang,CHU Guixun.Research on Damage Identification of Reinforced Concrete Beams under High Temperature[J].Structural Engineers,2020,36(1):60-66. |
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| Authors: | GAO Litang XU Panrang CHU Guixun |
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| Affiliation: | (Qingdao University of Technological,Qingdao 266033,China) |
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| Abstract: | This paper is based on the theory of dynamic damage identification and fire damage identification theory.By introducing transverse isotropy beam according to the characteristics of fire damage,considering relationship between the stiffness and elastic modulus,the neutral axis and the reinforcement ratio as well,and established the free vibration equation and its analytical solution for the simple beam of reinforced concrete.A new identification method for simply supported beams with fire damage due to thermal mechanical coupling is proposed,which is based on the frequency as identify the fingerprint parameter,and the simulation is verified by ABAQUS finite element software.It was concluded that the theory and simulation are highly consistent. |
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| Keywords: | simple supported beam fire damage identification frequency finite element analysis |
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