利用位移影响线对曲线桥进行损伤识别的影响因素研究

基于位移影响线的特点,首先对简支曲线梁进行模拟,通过分析得出,曲线梁位移影响线对损伤具有很好的识别效果。然后通过对车辆移动荷载进行模拟,得出荷载速度越低损伤识别效果越好,且影响线损伤识别效果受到影响线取值间距的影响,选取适当的位移取值间距能够提高损伤识别的敏感性。进一步对曲线梁不同的支撑形式进行模拟分析,得出损伤指标随着支座约束的增加而增大。研究结论可以为曲线梁桥的设计及检测研究提供方向及技术支持。

The Analysis of Influencing Factors to the Damage Identification of Curved Bridge using the Influence line of Displacement

Abstract] Based on the characteristics of the influence line of displacement, first of all make a simulation of the simply curved bridge, get the conclusion that the influence line of displacement has a good recognition effect to the damage. Then make a simulation of Vehicle moving load, get the conclusion that the effect of the damage identification will be better as the speed of the load be lower, and the distance between two points of the influence line we take has an impact on the effect of the damage identification. Getting appropriate distance of values can improve the sensitivity of damage identification. Then simulate Different support forms, through the analysis get the conclusion that the damage index increase as the increase of the constraint support. The conclusions of these studies can provide the direction and the Technical support for the design and the monitor of curved bridge.