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首页> 外文会议>International Congress on Recent Developments in Air- and Structure-Borne Sound and Vibration >VIBRATION MONITORING OF REINFORCED CONCRETE BEAMS
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VIBRATION MONITORING OF REINFORCED CONCRETE BEAMS

机译：钢筋混凝土梁的振动监测

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The vibration behavior of a reinforced concrete beam was studied theoretically and experimentally. A relationship between the resonance frequencies of a beam and the applied bending moment was established. A frequency criterion corresponding to the crack control criterion in the ACI Building Code was developed. It was found that resonance frequencies and damping change rapidly when cracks are initialized and start growing. The resonance frequency shift could be as large as 20-25 percent of the original value and the decay rate could change by a factor of four. To accurately estimate the frequency and damping of a cracked reinforced concrete beam, empirical formulas are proposed. This technique is promising for global nondestructive evaluation of reinforced concrete structures.
机译：理论上和实验研究了钢筋混凝土梁的振动行为。建立了梁的共振频率与应用弯矩之间的关系。开发了与ACI建筑代码中的裂缝控制标准对应的频率标准。发现当裂缝初始化并开始生长时，谐振频率和阻尼变化迅速。谐振频率偏移可能大约20-25％的原始值，衰减率可能会变为四倍。为了准确估计裂纹钢筋混凝土梁的频率和阻尼，提出了经验公式。这种技术对钢筋混凝土结构的全球无损评估有前途。

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