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发布时间：2025-04-29
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| 影响因子： | 3.7 |
| DOI码： | 10.1088/1361-665X/ab1f27 |
| 所属单位： | 长江大学电子信息与电气工程学院 |
| 教研室： | 电子系 |
| 发表刊物： | Smart Materials and Structures |
| 关键字： | Lead Zirconate Titanate (PZT), ultrasonic head wave amplitude, concrete filled steel tubular member (CFSTM), debond detection, cementation index (CI) |
| 摘要： | Concrete-filled steel tubular member (CFSTM) is widely used in high-rise buildings, long-span bridges and other complex environments. Poor cementation leads to incomplete contact and even no contact between the steel tubular member and the concrete grout, which reduces the ultimate load bearing capacity and ductility of CFSTM. A method to quantitatively evaluate the debond of the CFSTM is proposed in this paper by using a pair of piezoceramic transducers respectively as actuator and sensor to emit and to receive stress wave signals. Since the gap between the steel tubular member and the concrete grout results in the change of the difference of acoustic impedance in propagating medium, the transmission coefficient of tubular decrease and the reflection coefficient increases, which leads to the increase of head wave amplitude and the decrease of cementation index (CI). In this research, numerical simulations with finite difference time domain (FDTD) method are used to demonstrate the feasibility of this method. Additionally, experiments were conducted, and experimental results also verify the effectiveness of the proposed method and show that CI based on piezoceramic is able to quantitatively evaluate the debond of the CFSTM. |
| 第一作者： | 李修权 |
| 论文类型： | SCI |
| 学科门类： | 工学 |
| 卷号： | 28 |
| 期号： | 075033 |
| 发表时间： | 2019-06-01 |
| 收录刊物： | SCI |
