Operational Modal Test of an Arch Bridge

被引：0

作者：

Zhang, Xin ^{[1
]}

Du, Xiuli ^{[2
]}

机构：

[1] Zhengzhou Univ, Zhengzhou 450001, Peoples R China

[2] Beijing Univ Technol, Beijing 100022, Peoples R China

来源：

TRENDS IN CIVIL ENGINEERING, PTS 1-4 | 2012年 / 446-449卷

关键词：

bridges; health monitoring; vibration; modal testing; NExT;

D O I：

10.4028/www.scientific.net/AMR.446-449.3233

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

A modal test was carried out on a 120m span concrete filled steel tubular arch bridge under operational conditions. The moving traffic load is considered as uncorrelated white noises at various points of the road surface and the test is of the type of multi-input multi-output (MIMO). The modal parameters are identified by Global Rational Fraction Polynomials (GRFP) method, a frequency domain method. In order to taking the mobile nature of the traffic load into consideration, a multi-input NExT method :is utilized to retrieve the frequency response function needed by GRFP. A proof of the NExT method in the case of multi-input case is also provided in this paper.

引用

页码：3233 / +

页数：3