Flexural performance correlation with natural bending frequency of post-tensioned concrete beam: experimental investigation
Flexural performance correlation with natural bending frequency of post-tensioned concrete beam: experimental investigation
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DOI：
10.1007/s13349-019-00374-3
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发表时间：
2020-01
影响因子：
4.4
通讯作者：
O. S. Luna Vera;Y. Oshima;Chul‐Woo Kim
中科院分区：
文献类型：
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作者：
O. S. Luna Vera;Y. Oshima;Chul‐Woo Kim
本研究检验了两根后张法混凝土梁的静力和动力试验结果。利用静力试验结果来评价梁的抗弯性能水平。从动态测试中获得的数据被用来识别在不同性能水平之后发生的模态参数的变化。使用包括加速度计、位移传感器和应变片在内的多种仪器测量了梁的静态和动态响应。对每一根梁进行肌腱切断，观察其对弯曲性能的影响，并评估在切断时刻产生的振动响应。研究结果表明了梁的性能与裂缝扩展之间的相关性，并解释了抗弯性能水平对梁的固有弯曲频率的影响。
This study examines results obtained experimentally from two post-tensioned concrete beams subjected to static and dynamic tests. The static tests results were used to evaluate the level of flexural performance in the beams. Data obtained from the dynamic tests were used to identify the change in modal parameters that occurred after different performance levels. Static and dynamic responses of the beams were measured using several instruments including accelerometers, displacement transducers, and strain gauges. A tendon cut was also applied to each beam to observe its influence in the flexural performance and assess the vibration responses produced at the severing moment. Outcomes of this study demonstrate the correlation between performance and cracks propagation in the beams, and also explain the influence of the flexural performance level on the natural bending frequencies.