桥梁结构损伤识别的预测模型研究

Study on Forecasting Modal for Damage Identification of Bridge Structure

多元回归分析在工程实际和科学研究中有着广泛的用途,无论是对未来的经济预测还是对结构的健康评估都将起到重要的作用。介绍了基于数理统计理论建立多元逐步回归预测模型的方法,并将其运用到损伤识别领域。根据监测系统所获得的桥梁结构健康状态下的测试数据所建立的预测模型可用于桥梁结构的损伤识别,并且这种方法可考虑各种因素对结构响应量的影响,识别效果好,适用性强。

The multi-element regression analysis method is widely used in the engineering practice and sci- ence research, it will play very important role both in future economic prediction and health state evaluation of the bridge structure. A method of setting up the multi-element regression forecasting modal is presented in this paper. The method is based on the mathematical statistics, and it can be used in the bridge structure damage identification field. The forecasting model established by making use of the data obtained by the long-term health monitoring system when the bridge structure is healthy can be used to identify the damage of bridge structure. Many factors influencing on the response variables of structure can be considered with this method. The effect of damage identification and the applicability of the method are satisfying.