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Identified Method of Arch Bridge Modal Parameters Based on Stochastic Subspace Combined with Stabilization Diagram(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2007年01期
Page:
21-25
Research Field:
Publishing date:
2007-03-20

Info

Title:
Identified Method of Arch Bridge Modal Parameters Based on Stochastic Subspace Combined with Stabilization Diagram
Author(s):
CHANG Jun1; 2;  ZHANG Qi-wei2;  SUN Li-min2
1. Department of Management Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, Jiangsu, China; 2. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
Keywords:
parameter identification;  ambient vibration;  dynamic property;  modal analysis;  stochastic subspace;  stabilization diagram;  arch bridge
PACS:
TU375.1
DOI:
-
Abstract:
Authors presented an identified method of arch bridge modal parameters based on stochastic subspace combined with stabilization diagram for the presence methods having shortcomings for example false modes. Stochastic subspace identification(SSI)can be used to identify structural modal parameters by ambient vibration. The key work of SSI is to gain the order of the system. Stabilization diagram is a novel approach to decide the rank of the system, but this method easily yields false mode. Authors improved the stabilization diagram so that the false mode could be seeked out and the results became more precise. The improved method was evaluated by an actual steel tubular concrete bridge. The result shows that the new approach can gain more precise outcome.

References:

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[6]CHANG J,ZHANG Q W,SUN L M.Application of Improved Stabilization Diagram in Modal Parameter Identification by Stochastic Subspace Identification[C]//ISHMII.Proceedings of the 2nd International Conference on Structural Health Monitoring of Intelligent Infrastructure.London:Taylor & Francis Group,2005:863-868.

Memo

Memo:
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Last Update: 2007-03-20