桥梁预警系统中两种损伤识别方法的对比分析

Comparative Analysis of Two Damage Detection Methods in Early Warning System of Bridge

损伤识别技术是桥梁安全预警系统中的关键内容,损伤识别的方法还决定着整个系统的工作性能。通过对连续箱梁桥的仿真分析,从对损伤的灵敏性、定位的准确性以及对测试误差的抗干扰性三个方面出发,结合理论设定不同的工况对曲率模态法和柔度矩阵法进行综合的对比分析,研究了曲率模态法和柔度矩阵法在桥梁安全预警系统中的适用性问题,为桥梁安全预警系统中损伤识别方法的选择提供了依据。

Damage detection technology is a key content of the early warning system of bridge safety. In this paper, based on the simulation analysis of continuous box girder bridge, comparative analysis of curvature mode method and flexibility matrix method is studied on three aspects of sensitivity on damage detection, accuracy on detection and localization and anti-influence of test error. The studies of applicability of these two methods to the damage detection of bridge provide a basis for the selection of damage detection method for the early warning system of bridge safety.