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首页> 外文期刊>International journal of structural stability and dynamics >Wave Number-Based Technique for Detecting Slope Discontinuity in Simple Beams Using Moving Test Vehicle
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Wave Number-Based Technique for Detecting Slope Discontinuity in Simple Beams Using Moving Test Vehicle

机译:基于波的基于Wake Test车辆中的简单梁中的斜率不连续的技术

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摘要

The wavelength characteristic is a useful clue for locating and assessing the severity of slope discontinuity in beams. In this study, the slope discontinuity of a beam is represented by an internal hinge restrained by elastic springs, and the wavelength of the beam is calculated indirectly from the vertical response of a test vehicle during its travel over the beam. The key parameters of the problem at hand are first unveiled using an approximate, closed-form solution for the response of the vehicle moving at low speeds over the bridge. Then a two-beam element model with slope discontinuity is formulated for the vehicle-bridge interaction (VBI) system for use in numerical simulation. In the examples, the wavenumber-based response of the test vehicle is used to identify the location and severity of the discontinuity in the beam. It is demonstrated that the wavelength-based technique presented herein by using the moving test vehicle as a moving sensor system offers a promising, alternative approach for damage detection in girder type bridges.
机译:波长特性是用于定位和评估光束中斜坡不连续性的严重程度的有用线索。在该研究中,光束的斜率不连续由由弹性弹簧抑制的内部铰链表示,并且光束的波长从梁的行进过程中间接地从测试车辆的垂直响应间接计算。首先使用近似闭合的解决方案推出手头的问题的关键参数,用于在桥上的低速下移动的车辆移动的响应。然后,用于在数值模拟中使用的车辆桥接相互作用(VBI)系统具有斜率不连续的双梁元件模型。在实施例中,测试车辆的基于波数的响应用于识别光束中不连续性的位置和严重程度。据证明,通过使用移动测试车辆作为移动传感器系统提供的基于波长的技术提供了有希望的替代方法,用于梁型桥梁中的损坏检测。

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