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美国新泽西州的一座四跨简支梁桥被选为Benchmark模型,作为国际旧桥性能研究和评估的新平台,国际上近十多所知名高校和测试咨询检测机构对该桥进行了系统的结构静动力试验及无损检测研究。该文简要介绍了该桥的选择过程和项目的基本情况,对该桥的南侧第2跨静动力试验结果进行了介绍。动力试验采用多参考点脉冲锤击法以得到结构的动力模态柔度,静载试验利用卡车进行加载,对比模态柔度下的弯沉与静载试验下的弯沉显示该方法能为结构损伤识别提供有效的决策支持。
A four-span simply supported girder bridge in New Jersey, USA, was chosen as the Benchmark model. As a new platform for international bridge research and evaluation, the bridge has been systematically constructed by nearly a dozen well-known international universities and testing and consulting agencies Static and dynamic tests and nondestructive testing. This paper briefly introduces the selection process of the bridge and the basic situation of the project, and presents the results of the second transonic static test on the south side of the bridge. The dynamic test adopts multi-reference point pulse hammering method to get the dynamic modal flexibility of the structure. The static load test is carried out by truck. The deflection under the modal compliance and the deflection under the static load test show that this method can be Structural damage identification provides effective decision support.