Model tests on structural damage detection of railway piers

被引：0
|
作者：
Yan Y.-Z. [1 ]
Zhan J.-W. [1 ]
Zhang N. [1 ]
Xia H. [1 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
来源：
Zhan, Jia-Wang | 1600年 / Chinese Vibration Engineering Society卷 / 35期
关键词：
Damage detection; FE model updating technique; Model test; Railway pier;
D O I：
10.13465/j.cnki.jvs.2016.14.031
中图分类号：
学科分类号：
摘要：
A model pier was erected in the laboratory, the damage of foundation was simulated by regulating the base constraint springs and multiple mass units were used to simulate the superstructure mass. The model was mainly used to simulate the railway low-height piers. The influences of base constraint, beam mass and lateral pier-top constraint on the dynamic characteristics of piers were analyzed in the model tests. An optimization algorithm was used to identify the damage of model pier by using the measured mode shapes and natural frequencies as input data. The analysis results indicate that the influence of constraints on the pier top due to track and supports cannot be neglected especially for double-track bridges. The modal frequencies and mode shapes are sensitive to the condition changes of beam mass, pier-top constraints and base stiffness. Using modal parameters as objective indexes, the damage in piers can be located and quantitatively identified by the FE model updating technique. © 2016, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：188 / 194
页数：6
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