基于挠度差值影响线的简支梁桥损伤识别研究

Damage Identification of Simply Supported Beam Bridge Based on the Influence Line of Deflection Difference

针对简支梁桥损伤识别问题,利用挠度差值影响线对简支梁桥进行了损伤位置判断,推导了挠度差值随荷载位置变化的解析式,并通过有限元软件模拟的手段对该方法进行了试验验证,从中发现该方法的局限性,提出了相关意见。

For simply supported girder bridge damage identification problem, the damage position of the simply sup ported beam bridge can be judged by the deflection difference influence line. The analytic formula of the deflection difference with the load position is derived and simulated by finite element software. The method is tested and veri fied. The limitations of the method are found out and their own views are put forward.